[jira] [Updated] (MRESOLVER-4) Use java.util.Objects#requireNonNull to intercept null input

["Hervé Boutemy (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MRESOLVER-4?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hervé Boutemy updated MRESOLVER-4:
----------------------------------
    Description: 
In several spots of Maven Resolver IAE is thrown where an argument is null. This should be turned into NullPointerException since JDK adheres to this, the description of this exception indicates that and Effective Java does that too. JDK 7 even provides a new [{{Objects}}|https://docs.oracle.com/javase/7/docs/api/java/util/Objects.html] class with {{requireNonNull}} method to ease checking

Most likely to be misused:
{noformat}
$ grep -r "throw new IllegalArgumentException" .
./maven-resolver-api/src/main/java/org/eclipse/aether/artifact/DefaultArtifact.java:            throw new IllegalArgumentException( "Bad artifact coordinates " + coords
./maven-resolver-api/src/main/java/org/eclipse/aether/artifact/DefaultArtifactType.java:            throw new IllegalArgumentException( "no type id specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/artifact/DefaultArtifactType.java:            throw new IllegalArgumentException( "no type id specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/collection/CollectResult.java:            throw new IllegalArgumentException( "dependency collection request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/DefaultRepositorySystemSession.java:            throw new IllegalArgumentException( "repository system session not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/DefaultSessionData.java:            throw new IllegalArgumentException( "key must not be null" );
./maven-resolver-api/src/main/java/org/eclipse/aether/DefaultSessionData.java:            throw new IllegalArgumentException( "key must not be null" );
./maven-resolver-api/src/main/java/org/eclipse/aether/DefaultSessionData.java:            throw new IllegalArgumentException( "key must not be null" );
./maven-resolver-api/src/main/java/org/eclipse/aether/deployment/DeployResult.java:            throw new IllegalArgumentException( "deploy request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/graph/DefaultDependencyNode.java:            throw new IllegalArgumentException( "key must not be null" );
./maven-resolver-api/src/main/java/org/eclipse/aether/graph/Dependency.java:            throw new IllegalArgumentException( "no artifact specified for dependency" );
./maven-resolver-api/src/main/java/org/eclipse/aether/installation/InstallResult.java:            throw new IllegalArgumentException( "install request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/metadata/DefaultMetadata.java:            throw new IllegalArgumentException( "metadata nature was not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/repository/AuthenticationContext.java:            throw new IllegalArgumentException( "repository system session missing" );
./maven-resolver-api/src/main/java/org/eclipse/aether/repository/AuthenticationContext.java:            throw new IllegalArgumentException( "authentication data key missing" );
./maven-resolver-api/src/main/java/org/eclipse/aether/repository/AuthenticationContext.java:            throw new IllegalArgumentException( "authentication data key missing" );
./maven-resolver-api/src/main/java/org/eclipse/aether/repository/LocalArtifactResult.java:            throw new IllegalArgumentException( "local artifact request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/repository/LocalMetadataResult.java:            throw new IllegalArgumentException( "local metadata request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/repository/RemoteRepository.java:                throw new IllegalArgumentException( "repository prototype missing" );
./maven-resolver-api/src/main/java/org/eclipse/aether/RepositoryEvent.java:                throw new IllegalArgumentException( "session not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/RepositoryEvent.java:                throw new IllegalArgumentException( "event type not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/ArtifactDescriptorResult.java:            throw new IllegalArgumentException( "artifact descriptor request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/ArtifactResult.java:            throw new IllegalArgumentException( "resolution request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/DependencyResult.java:            throw new IllegalArgumentException( "dependency request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/MetadataResult.java:            throw new IllegalArgumentException( "metadata request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/VersionRangeResult.java:            throw new IllegalArgumentException( "version range request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/VersionResult.java:            throw new IllegalArgumentException( "version request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "session not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "transfer resource not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "event type not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "event type not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "request type not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "number of transferred bytes cannot be negative" );
./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "number of transferred bytes cannot be negative" );
./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferResource.java:            throw new IllegalArgumentException( "resume offset cannot be negative" );
./maven-resolver-api/src/main/java/org/eclipse/aether/version/VersionRange.java:                throw new IllegalArgumentException( "version missing" );
./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnector.java:                throw new IllegalArgumentException( "destination file has not been specified" );
./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnector.java:                throw new IllegalArgumentException( "source file has not been specified" );
./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnectorFactory.java:            throw new IllegalArgumentException( "transporter provider has not been specified" );
./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnectorFactory.java:            throw new IllegalArgumentException( "repository layout provider has not been specified" );
./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnectorFactory.java:            throw new IllegalArgumentException( "checksum policy provider has not been specified" );
./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnectorFactory.java:            throw new IllegalArgumentException( "file processor has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/impl/DefaultServiceLocator.java:                throw new IllegalArgumentException( "service type not specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/impl/DefaultServiceLocator.java:                        throw new IllegalArgumentException( "service instance not specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/impl/DefaultServiceLocator.java:                throw new IllegalArgumentException( "implementation class not specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/impl/DefaultServiceLocator.java:            throw new IllegalArgumentException( "service type not specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "file processor has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "repository event dispatcher has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "version resolver has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "update check manager has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "repository connector provider has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "remote repository manager has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "sync context factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "offline controller has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDependencyCollector.java:            throw new IllegalArgumentException( "remote repository manager has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDependencyCollector.java:            throw new IllegalArgumentException( "artifact descriptor reader has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDependencyCollector.java:            throw new IllegalArgumentException( "version range resolver has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDependencyGraphTransformationContext.java:            throw new IllegalArgumentException( "key must not be null" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDependencyGraphTransformationContext.java:            throw new IllegalArgumentException( "key must not be null" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "file processor has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "repository event dispatcher has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "repository connector provider has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "remote repository manager has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "update check manager has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "metadata generator factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "sync context factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "offline controller has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:            throw new IllegalArgumentException( "file processor has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:            throw new IllegalArgumentException( "repository event dispatcher has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:            throw new IllegalArgumentException( "metadata generator factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:            throw new IllegalArgumentException( "sync context factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:                throw new IllegalArgumentException( "Cannot install " + dstFile + " to same path" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:                    throw new IllegalArgumentException( "Cannot install " + dstFile + " to same path" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultLocalRepositoryProvider.java:            throw new IllegalArgumentException( "Local repository manager factory has not been specified." );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "repository event dispatcher has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "update check manager has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "repository connector provider has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "remote repository manager has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "sync context factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "offline controller has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRemoteRepositoryManager.java:            throw new IllegalArgumentException( "update policy analyzer has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRemoteRepositoryManager.java:            throw new IllegalArgumentException( "checksum policy provider has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositoryConnectorProvider.java:            throw new IllegalArgumentException( "repository connector factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositoryConnectorProvider.java:            throw new IllegalArgumentException( "remote repository has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositoryEventDispatcher.java:            throw new IllegalArgumentException( "repository listener has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositoryLayoutProvider.java:            throw new IllegalArgumentException( "layout factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositoryLayoutProvider.java:            throw new IllegalArgumentException( "remote repository has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "version resolver has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "version range resolver has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "artifact resolver has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "metadata resolver has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "artifact descriptor reader has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "dependency collector has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "installer has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "deployer has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "local repository provider has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "sync context factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "remote repository manager has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "dependency node or collect request missing" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( e.getMessage(), e );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "Invalid repository system session: the session may not be null." );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:        throw new IllegalArgumentException( "Invalid repository system session: " + name + " is not set." );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultTransporterProvider.java:            throw new IllegalArgumentException( "transporter factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultTransporterProvider.java:            throw new IllegalArgumentException( "remote repository has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultUpdateCheckManager.java:            throw new IllegalArgumentException( "update policy analyzer has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultUpdateCheckManager.java:            throw new IllegalArgumentException( String.format( "The artifact '%s' has no file attached", artifact ) );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultUpdateCheckManager.java:            throw new IllegalArgumentException( String.format( "The metadata '%s' has no file attached", metadata ) );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/EnhancedLocalRepositoryManager.java:            throw new IllegalArgumentException( "artifact to register not specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/SimpleLocalRepositoryManager.java:            throw new IllegalArgumentException( "base directory has not been specified" );
./maven-resolver-impl/src/test/java/org/eclipse/aether/internal/impl/DefaultDependencyCollectorTest.java:            throw new IllegalArgumentException( "Illegal coordinates for child", e );
./maven-resolver-impl/src/test/java/org/eclipse/aether/internal/impl/DefaultDependencyCollectorTest.java:            throw new IllegalArgumentException( "Illegal coordinates for child", e );
./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/layout/RepositoryLayout.java:                throw new IllegalArgumentException( "resource location must not have query parameters: " + location );
./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/layout/RepositoryLayout.java:                throw new IllegalArgumentException( "resource location must not have a fragment: " + location );
./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/layout/RepositoryLayout.java:                throw new IllegalArgumentException( "checksum algorithm has not been specified" );
./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/layout/RepositoryLayout.java:                throw new IllegalArgumentException( "checksum location has not been specified" );
./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/layout/RepositoryLayout.java:                throw new IllegalArgumentException( "checksum location must be relative" );
./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/transport/TransportTask.java:            throw new IllegalArgumentException( "resource location has not been specified" );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/ArtifactDefinition.java:            throw new IllegalArgumentException( "Need definition like 'gid:aid:ext:ver[:scope]', but was: "
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/DependencyGraphParser.java:                    throw new IllegalArgumentException( "not enough substitutions to fill placeholders" );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/DependencyGraphParser.java:                    throw new IllegalArgumentException( "undefined reference " + reference );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/DependencyGraphParser.java:            throw new IllegalArgumentException( "dangling node: " + def );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/DependencyGraphParser.java:            throw new IllegalArgumentException( "inconsistent leveling (parent for level 0?): " + def );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/DependencyGraphParser.java:                throw new IllegalArgumentException( "bad version: " + e.getMessage(), e );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/IniArtifactDataReader.java:                throw new IllegalArgumentException( "Need definition like 'gid:aid:ext:ver[:scope]', but was: "
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/NodeBuilder.java:                throw new IllegalArgumentException( "bad version: " + e.getMessage(), e );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/NodeDefinition.java:            throw new IllegalArgumentException( "bad syntax: " + def );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/TestDependencyGraphTransformationContext.java:            throw new IllegalArgumentException( "key must not be null" );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/TestDependencyGraphTransformationContext.java:            throw new IllegalArgumentException( "key must not be null" );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/TestVersionConstraint.java:            throw new IllegalArgumentException( "version range missing" );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/TestVersionConstraint.java:            throw new IllegalArgumentException( "version missing" );
./maven-resolver-transport-file/src/main/java/org/eclipse/aether/transport/file/FileTransporter.java:            throw new IllegalArgumentException( "Illegal resource path: " + path );
./maven-resolver-transport-wagon/src/main/java/org/eclipse/aether/internal/transport/wagon/PlexusWagonConfigurator.java:            throw new IllegalArgumentException( "plexus container has not been specified" );
./maven-resolver-transport-wagon/src/main/java/org/eclipse/aether/internal/transport/wagon/PlexusWagonConfigurator.java:            throw new IllegalArgumentException( "Unexpected configuration type: " + configuration.getClass().getName() );
./maven-resolver-transport-wagon/src/main/java/org/eclipse/aether/internal/transport/wagon/PlexusWagonProvider.java:            throw new IllegalArgumentException( "plexus container has not been specified" );
./maven-resolver-transport-wagon/src/test/java/org/eclipse/aether/transport/wagon/AbstractWagonTransporterTest.java:                throw new IllegalArgumentException( "Unknown wagon role: " + roleHint );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/artifact/DelegatingArtifact.java:            throw new IllegalArgumentException( "delegate artifact not specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/artifact/SubArtifact.java:            throw new IllegalArgumentException( "no artifact specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/concurrency/RunnableErrorForwarder.java:            throw new IllegalArgumentException( "runnable missing" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/filter/NotDependencyFilter.java:            throw new IllegalArgumentException( "no filter specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/transformer/ConflictResolver.java:            throw new IllegalArgumentException( "version selector not specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/transformer/ConflictResolver.java:            throw new IllegalArgumentException( "scope selector not specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/transformer/ConflictResolver.java:            throw new IllegalArgumentException( "scope deriver not specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/transformer/ConflictResolver.java:            throw new IllegalArgumentException( "optionality selector not specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/visitor/FilteringDependencyVisitor.java:            throw new IllegalArgumentException( "dependency visitor not specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/visitor/TreeDependencyVisitor.java:            throw new IllegalArgumentException( "no visitor delegate specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/ComponentAuthentication.java:            throw new IllegalArgumentException( "authentication key missing" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/ConservativeAuthenticationSelector.java:            throw new IllegalArgumentException( "no authentication selector specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/ConservativeProxySelector.java:            throw new IllegalArgumentException( "no proxy selector specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/DefaultProxySelector.java:            throw new IllegalArgumentException( "proxy not specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/SecretAuthentication.java:            throw new IllegalArgumentException( "authentication key missing" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/StringAuthentication.java:            throw new IllegalArgumentException( "authentication key missing" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/version/GenericVersionConstraint.java:            throw new IllegalArgumentException( "version range missing" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/version/GenericVersionConstraint.java:            throw new IllegalArgumentException( "version missing" );
./maven-resolver-util/src/test/java/org/eclipse/aether/util/graph/transformer/JavaScopeSelectorTest.java:            throw new IllegalArgumentException( "Illegal coordinates for child", e );
./maven-resolver-util/src/test/java/org/eclipse/aether/util/graph/transformer/JavaScopeSelectorTest.java:            throw new IllegalArgumentException( "Illegal coordinates for child", e );
./maven-resolver-util/src/test/java/org/eclipse/aether/util/graph/versions/AbstractVersionFilterTest.java:            throw new IllegalArgumentException( e );
./maven-resolver-util/src/test/java/org/eclipse/aether/util/version/UnionVersionRangeTest.java:            throw new IllegalArgumentException( e );
./maven-resolver-util/src/test/java/org/eclipse/aether/util/version/UnionVersionRangeTest.java:                throw new IllegalArgumentException( e );
{noformat}

  was:
In several spots of Maven Resolver IAE is thrown where an argument is null. This should be turned into NullPointerException since JDK adheres to is and the description of this exception indicates that and Effective Java does that too.

Most likely to be misused:
{noformat}
$ grep -r "throw new IllegalArgumentException" .
./maven-resolver-api/src/main/java/org/eclipse/aether/artifact/DefaultArtifact.java:            throw new IllegalArgumentException( "Bad artifact coordinates " + coords
./maven-resolver-api/src/main/java/org/eclipse/aether/artifact/DefaultArtifactType.java:            throw new IllegalArgumentException( "no type id specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/artifact/DefaultArtifactType.java:            throw new IllegalArgumentException( "no type id specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/collection/CollectResult.java:            throw new IllegalArgumentException( "dependency collection request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/DefaultRepositorySystemSession.java:            throw new IllegalArgumentException( "repository system session not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/DefaultSessionData.java:            throw new IllegalArgumentException( "key must not be null" );
./maven-resolver-api/src/main/java/org/eclipse/aether/DefaultSessionData.java:            throw new IllegalArgumentException( "key must not be null" );
./maven-resolver-api/src/main/java/org/eclipse/aether/DefaultSessionData.java:            throw new IllegalArgumentException( "key must not be null" );
./maven-resolver-api/src/main/java/org/eclipse/aether/deployment/DeployResult.java:            throw new IllegalArgumentException( "deploy request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/graph/DefaultDependencyNode.java:            throw new IllegalArgumentException( "key must not be null" );
./maven-resolver-api/src/main/java/org/eclipse/aether/graph/Dependency.java:            throw new IllegalArgumentException( "no artifact specified for dependency" );
./maven-resolver-api/src/main/java/org/eclipse/aether/installation/InstallResult.java:            throw new IllegalArgumentException( "install request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/metadata/DefaultMetadata.java:            throw new IllegalArgumentException( "metadata nature was not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/repository/AuthenticationContext.java:            throw new IllegalArgumentException( "repository system session missing" );
./maven-resolver-api/src/main/java/org/eclipse/aether/repository/AuthenticationContext.java:            throw new IllegalArgumentException( "authentication data key missing" );
./maven-resolver-api/src/main/java/org/eclipse/aether/repository/AuthenticationContext.java:            throw new IllegalArgumentException( "authentication data key missing" );
./maven-resolver-api/src/main/java/org/eclipse/aether/repository/LocalArtifactResult.java:            throw new IllegalArgumentException( "local artifact request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/repository/LocalMetadataResult.java:            throw new IllegalArgumentException( "local metadata request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/repository/RemoteRepository.java:                throw new IllegalArgumentException( "repository prototype missing" );
./maven-resolver-api/src/main/java/org/eclipse/aether/RepositoryEvent.java:                throw new IllegalArgumentException( "session not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/RepositoryEvent.java:                throw new IllegalArgumentException( "event type not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/ArtifactDescriptorResult.java:            throw new IllegalArgumentException( "artifact descriptor request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/ArtifactResult.java:            throw new IllegalArgumentException( "resolution request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/DependencyResult.java:            throw new IllegalArgumentException( "dependency request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/MetadataResult.java:            throw new IllegalArgumentException( "metadata request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/VersionRangeResult.java:            throw new IllegalArgumentException( "version range request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/VersionResult.java:            throw new IllegalArgumentException( "version request has not been specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "session not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "transfer resource not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "event type not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "event type not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "request type not specified" );
./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "number of transferred bytes cannot be negative" );
./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "number of transferred bytes cannot be negative" );
./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferResource.java:            throw new IllegalArgumentException( "resume offset cannot be negative" );
./maven-resolver-api/src/main/java/org/eclipse/aether/version/VersionRange.java:                throw new IllegalArgumentException( "version missing" );
./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnector.java:                throw new IllegalArgumentException( "destination file has not been specified" );
./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnector.java:                throw new IllegalArgumentException( "source file has not been specified" );
./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnectorFactory.java:            throw new IllegalArgumentException( "transporter provider has not been specified" );
./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnectorFactory.java:            throw new IllegalArgumentException( "repository layout provider has not been specified" );
./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnectorFactory.java:            throw new IllegalArgumentException( "checksum policy provider has not been specified" );
./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnectorFactory.java:            throw new IllegalArgumentException( "file processor has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/impl/DefaultServiceLocator.java:                throw new IllegalArgumentException( "service type not specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/impl/DefaultServiceLocator.java:                        throw new IllegalArgumentException( "service instance not specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/impl/DefaultServiceLocator.java:                throw new IllegalArgumentException( "implementation class not specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/impl/DefaultServiceLocator.java:            throw new IllegalArgumentException( "service type not specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "file processor has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "repository event dispatcher has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "version resolver has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "update check manager has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "repository connector provider has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "remote repository manager has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "sync context factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "offline controller has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDependencyCollector.java:            throw new IllegalArgumentException( "remote repository manager has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDependencyCollector.java:            throw new IllegalArgumentException( "artifact descriptor reader has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDependencyCollector.java:            throw new IllegalArgumentException( "version range resolver has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDependencyGraphTransformationContext.java:            throw new IllegalArgumentException( "key must not be null" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDependencyGraphTransformationContext.java:            throw new IllegalArgumentException( "key must not be null" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "file processor has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "repository event dispatcher has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "repository connector provider has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "remote repository manager has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "update check manager has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "metadata generator factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "sync context factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "offline controller has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:            throw new IllegalArgumentException( "file processor has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:            throw new IllegalArgumentException( "repository event dispatcher has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:            throw new IllegalArgumentException( "metadata generator factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:            throw new IllegalArgumentException( "sync context factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:                throw new IllegalArgumentException( "Cannot install " + dstFile + " to same path" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:                    throw new IllegalArgumentException( "Cannot install " + dstFile + " to same path" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultLocalRepositoryProvider.java:            throw new IllegalArgumentException( "Local repository manager factory has not been specified." );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "repository event dispatcher has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "update check manager has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "repository connector provider has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "remote repository manager has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "sync context factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "offline controller has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRemoteRepositoryManager.java:            throw new IllegalArgumentException( "update policy analyzer has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRemoteRepositoryManager.java:            throw new IllegalArgumentException( "checksum policy provider has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositoryConnectorProvider.java:            throw new IllegalArgumentException( "repository connector factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositoryConnectorProvider.java:            throw new IllegalArgumentException( "remote repository has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositoryEventDispatcher.java:            throw new IllegalArgumentException( "repository listener has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositoryLayoutProvider.java:            throw new IllegalArgumentException( "layout factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositoryLayoutProvider.java:            throw new IllegalArgumentException( "remote repository has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "version resolver has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "version range resolver has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "artifact resolver has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "metadata resolver has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "artifact descriptor reader has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "dependency collector has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "installer has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "deployer has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "local repository provider has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "sync context factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "remote repository manager has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "dependency node or collect request missing" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( e.getMessage(), e );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "Invalid repository system session: the session may not be null." );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:        throw new IllegalArgumentException( "Invalid repository system session: " + name + " is not set." );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultTransporterProvider.java:            throw new IllegalArgumentException( "transporter factory has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultTransporterProvider.java:            throw new IllegalArgumentException( "remote repository has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultUpdateCheckManager.java:            throw new IllegalArgumentException( "update policy analyzer has not been specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultUpdateCheckManager.java:            throw new IllegalArgumentException( String.format( "The artifact '%s' has no file attached", artifact ) );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultUpdateCheckManager.java:            throw new IllegalArgumentException( String.format( "The metadata '%s' has no file attached", metadata ) );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/EnhancedLocalRepositoryManager.java:            throw new IllegalArgumentException( "artifact to register not specified" );
./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/SimpleLocalRepositoryManager.java:            throw new IllegalArgumentException( "base directory has not been specified" );
./maven-resolver-impl/src/test/java/org/eclipse/aether/internal/impl/DefaultDependencyCollectorTest.java:            throw new IllegalArgumentException( "Illegal coordinates for child", e );
./maven-resolver-impl/src/test/java/org/eclipse/aether/internal/impl/DefaultDependencyCollectorTest.java:            throw new IllegalArgumentException( "Illegal coordinates for child", e );
./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/layout/RepositoryLayout.java:                throw new IllegalArgumentException( "resource location must not have query parameters: " + location );
./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/layout/RepositoryLayout.java:                throw new IllegalArgumentException( "resource location must not have a fragment: " + location );
./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/layout/RepositoryLayout.java:                throw new IllegalArgumentException( "checksum algorithm has not been specified" );
./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/layout/RepositoryLayout.java:                throw new IllegalArgumentException( "checksum location has not been specified" );
./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/layout/RepositoryLayout.java:                throw new IllegalArgumentException( "checksum location must be relative" );
./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/transport/TransportTask.java:            throw new IllegalArgumentException( "resource location has not been specified" );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/ArtifactDefinition.java:            throw new IllegalArgumentException( "Need definition like 'gid:aid:ext:ver[:scope]', but was: "
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/DependencyGraphParser.java:                    throw new IllegalArgumentException( "not enough substitutions to fill placeholders" );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/DependencyGraphParser.java:                    throw new IllegalArgumentException( "undefined reference " + reference );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/DependencyGraphParser.java:            throw new IllegalArgumentException( "dangling node: " + def );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/DependencyGraphParser.java:            throw new IllegalArgumentException( "inconsistent leveling (parent for level 0?): " + def );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/DependencyGraphParser.java:                throw new IllegalArgumentException( "bad version: " + e.getMessage(), e );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/IniArtifactDataReader.java:                throw new IllegalArgumentException( "Need definition like 'gid:aid:ext:ver[:scope]', but was: "
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/NodeBuilder.java:                throw new IllegalArgumentException( "bad version: " + e.getMessage(), e );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/NodeDefinition.java:            throw new IllegalArgumentException( "bad syntax: " + def );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/TestDependencyGraphTransformationContext.java:            throw new IllegalArgumentException( "key must not be null" );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/TestDependencyGraphTransformationContext.java:            throw new IllegalArgumentException( "key must not be null" );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/TestVersionConstraint.java:            throw new IllegalArgumentException( "version range missing" );
./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/TestVersionConstraint.java:            throw new IllegalArgumentException( "version missing" );
./maven-resolver-transport-file/src/main/java/org/eclipse/aether/transport/file/FileTransporter.java:            throw new IllegalArgumentException( "Illegal resource path: " + path );
./maven-resolver-transport-wagon/src/main/java/org/eclipse/aether/internal/transport/wagon/PlexusWagonConfigurator.java:            throw new IllegalArgumentException( "plexus container has not been specified" );
./maven-resolver-transport-wagon/src/main/java/org/eclipse/aether/internal/transport/wagon/PlexusWagonConfigurator.java:            throw new IllegalArgumentException( "Unexpected configuration type: " + configuration.getClass().getName() );
./maven-resolver-transport-wagon/src/main/java/org/eclipse/aether/internal/transport/wagon/PlexusWagonProvider.java:            throw new IllegalArgumentException( "plexus container has not been specified" );
./maven-resolver-transport-wagon/src/test/java/org/eclipse/aether/transport/wagon/AbstractWagonTransporterTest.java:                throw new IllegalArgumentException( "Unknown wagon role: " + roleHint );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/artifact/DelegatingArtifact.java:            throw new IllegalArgumentException( "delegate artifact not specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/artifact/SubArtifact.java:            throw new IllegalArgumentException( "no artifact specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/concurrency/RunnableErrorForwarder.java:            throw new IllegalArgumentException( "runnable missing" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/filter/NotDependencyFilter.java:            throw new IllegalArgumentException( "no filter specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/transformer/ConflictResolver.java:            throw new IllegalArgumentException( "version selector not specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/transformer/ConflictResolver.java:            throw new IllegalArgumentException( "scope selector not specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/transformer/ConflictResolver.java:            throw new IllegalArgumentException( "scope deriver not specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/transformer/ConflictResolver.java:            throw new IllegalArgumentException( "optionality selector not specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/visitor/FilteringDependencyVisitor.java:            throw new IllegalArgumentException( "dependency visitor not specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/visitor/TreeDependencyVisitor.java:            throw new IllegalArgumentException( "no visitor delegate specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/ComponentAuthentication.java:            throw new IllegalArgumentException( "authentication key missing" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/ConservativeAuthenticationSelector.java:            throw new IllegalArgumentException( "no authentication selector specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/ConservativeProxySelector.java:            throw new IllegalArgumentException( "no proxy selector specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/DefaultProxySelector.java:            throw new IllegalArgumentException( "proxy not specified" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/SecretAuthentication.java:            throw new IllegalArgumentException( "authentication key missing" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/StringAuthentication.java:            throw new IllegalArgumentException( "authentication key missing" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/version/GenericVersionConstraint.java:            throw new IllegalArgumentException( "version range missing" );
./maven-resolver-util/src/main/java/org/eclipse/aether/util/version/GenericVersionConstraint.java:            throw new IllegalArgumentException( "version missing" );
./maven-resolver-util/src/test/java/org/eclipse/aether/util/graph/transformer/JavaScopeSelectorTest.java:            throw new IllegalArgumentException( "Illegal coordinates for child", e );
./maven-resolver-util/src/test/java/org/eclipse/aether/util/graph/transformer/JavaScopeSelectorTest.java:            throw new IllegalArgumentException( "Illegal coordinates for child", e );
./maven-resolver-util/src/test/java/org/eclipse/aether/util/graph/versions/AbstractVersionFilterTest.java:            throw new IllegalArgumentException( e );
./maven-resolver-util/src/test/java/org/eclipse/aether/util/version/UnionVersionRangeTest.java:            throw new IllegalArgumentException( e );
./maven-resolver-util/src/test/java/org/eclipse/aether/util/version/UnionVersionRangeTest.java:                throw new IllegalArgumentException( e );
{noformat}


> Use java.util.Objects#requireNonNull to intercept null input
> ------------------------------------------------------------
>
>                 Key: MRESOLVER-4
>                 URL: https://issues.apache.org/jira/browse/MRESOLVER-4
>             Project: Maven Resolver
>          Issue Type: Improvement
>    Affects Versions: Maven Artifact Resolver 1.2.0 pre-reset
>            Reporter: Michael Osipov
>            Assignee: Michael Osipov
>            Priority: Minor
>             Fix For: Maven Artifact Resolver 1.2.0 pre-reset
>
>
> In several spots of Maven Resolver IAE is thrown where an argument is null. This should be turned into NullPointerException since JDK adheres to this, the description of this exception indicates that and Effective Java does that too. JDK 7 even provides a new [{{Objects}}|https://docs.oracle.com/javase/7/docs/api/java/util/Objects.html] class with {{requireNonNull}} method to ease checking
> Most likely to be misused:
> {noformat}
> $ grep -r "throw new IllegalArgumentException" .
> ./maven-resolver-api/src/main/java/org/eclipse/aether/artifact/DefaultArtifact.java:            throw new IllegalArgumentException( "Bad artifact coordinates " + coords
> ./maven-resolver-api/src/main/java/org/eclipse/aether/artifact/DefaultArtifactType.java:            throw new IllegalArgumentException( "no type id specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/artifact/DefaultArtifactType.java:            throw new IllegalArgumentException( "no type id specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/collection/CollectResult.java:            throw new IllegalArgumentException( "dependency collection request has not been specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/DefaultRepositorySystemSession.java:            throw new IllegalArgumentException( "repository system session not specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/DefaultSessionData.java:            throw new IllegalArgumentException( "key must not be null" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/DefaultSessionData.java:            throw new IllegalArgumentException( "key must not be null" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/DefaultSessionData.java:            throw new IllegalArgumentException( "key must not be null" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/deployment/DeployResult.java:            throw new IllegalArgumentException( "deploy request has not been specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/graph/DefaultDependencyNode.java:            throw new IllegalArgumentException( "key must not be null" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/graph/Dependency.java:            throw new IllegalArgumentException( "no artifact specified for dependency" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/installation/InstallResult.java:            throw new IllegalArgumentException( "install request has not been specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/metadata/DefaultMetadata.java:            throw new IllegalArgumentException( "metadata nature was not specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/repository/AuthenticationContext.java:            throw new IllegalArgumentException( "repository system session missing" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/repository/AuthenticationContext.java:            throw new IllegalArgumentException( "authentication data key missing" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/repository/AuthenticationContext.java:            throw new IllegalArgumentException( "authentication data key missing" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/repository/LocalArtifactResult.java:            throw new IllegalArgumentException( "local artifact request has not been specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/repository/LocalMetadataResult.java:            throw new IllegalArgumentException( "local metadata request has not been specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/repository/RemoteRepository.java:                throw new IllegalArgumentException( "repository prototype missing" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/RepositoryEvent.java:                throw new IllegalArgumentException( "session not specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/RepositoryEvent.java:                throw new IllegalArgumentException( "event type not specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/ArtifactDescriptorResult.java:            throw new IllegalArgumentException( "artifact descriptor request has not been specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/ArtifactResult.java:            throw new IllegalArgumentException( "resolution request has not been specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/DependencyResult.java:            throw new IllegalArgumentException( "dependency request has not been specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/MetadataResult.java:            throw new IllegalArgumentException( "metadata request has not been specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/VersionRangeResult.java:            throw new IllegalArgumentException( "version range request has not been specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/resolution/VersionResult.java:            throw new IllegalArgumentException( "version request has not been specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "session not specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "transfer resource not specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "event type not specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "event type not specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "request type not specified" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "number of transferred bytes cannot be negative" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferEvent.java:                throw new IllegalArgumentException( "number of transferred bytes cannot be negative" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/transfer/TransferResource.java:            throw new IllegalArgumentException( "resume offset cannot be negative" );
> ./maven-resolver-api/src/main/java/org/eclipse/aether/version/VersionRange.java:                throw new IllegalArgumentException( "version missing" );
> ./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnector.java:                throw new IllegalArgumentException( "destination file has not been specified" );
> ./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnector.java:                throw new IllegalArgumentException( "source file has not been specified" );
> ./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnectorFactory.java:            throw new IllegalArgumentException( "transporter provider has not been specified" );
> ./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnectorFactory.java:            throw new IllegalArgumentException( "repository layout provider has not been specified" );
> ./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnectorFactory.java:            throw new IllegalArgumentException( "checksum policy provider has not been specified" );
> ./maven-resolver-connector-basic/src/main/java/org/eclipse/aether/connector/basic/BasicRepositoryConnectorFactory.java:            throw new IllegalArgumentException( "file processor has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/impl/DefaultServiceLocator.java:                throw new IllegalArgumentException( "service type not specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/impl/DefaultServiceLocator.java:                        throw new IllegalArgumentException( "service instance not specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/impl/DefaultServiceLocator.java:                throw new IllegalArgumentException( "implementation class not specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/impl/DefaultServiceLocator.java:            throw new IllegalArgumentException( "service type not specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "file processor has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "repository event dispatcher has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "version resolver has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "update check manager has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "repository connector provider has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "remote repository manager has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "sync context factory has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultArtifactResolver.java:            throw new IllegalArgumentException( "offline controller has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDependencyCollector.java:            throw new IllegalArgumentException( "remote repository manager has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDependencyCollector.java:            throw new IllegalArgumentException( "artifact descriptor reader has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDependencyCollector.java:            throw new IllegalArgumentException( "version range resolver has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDependencyGraphTransformationContext.java:            throw new IllegalArgumentException( "key must not be null" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDependencyGraphTransformationContext.java:            throw new IllegalArgumentException( "key must not be null" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "file processor has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "repository event dispatcher has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "repository connector provider has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "remote repository manager has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "update check manager has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "metadata generator factory has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "sync context factory has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultDeployer.java:            throw new IllegalArgumentException( "offline controller has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:            throw new IllegalArgumentException( "file processor has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:            throw new IllegalArgumentException( "repository event dispatcher has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:            throw new IllegalArgumentException( "metadata generator factory has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:            throw new IllegalArgumentException( "sync context factory has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:                throw new IllegalArgumentException( "Cannot install " + dstFile + " to same path" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultInstaller.java:                    throw new IllegalArgumentException( "Cannot install " + dstFile + " to same path" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultLocalRepositoryProvider.java:            throw new IllegalArgumentException( "Local repository manager factory has not been specified." );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "repository event dispatcher has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "update check manager has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "repository connector provider has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "remote repository manager has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "sync context factory has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultMetadataResolver.java:            throw new IllegalArgumentException( "offline controller has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRemoteRepositoryManager.java:            throw new IllegalArgumentException( "update policy analyzer has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRemoteRepositoryManager.java:            throw new IllegalArgumentException( "checksum policy provider has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositoryConnectorProvider.java:            throw new IllegalArgumentException( "repository connector factory has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositoryConnectorProvider.java:            throw new IllegalArgumentException( "remote repository has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositoryEventDispatcher.java:            throw new IllegalArgumentException( "repository listener has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositoryLayoutProvider.java:            throw new IllegalArgumentException( "layout factory has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositoryLayoutProvider.java:            throw new IllegalArgumentException( "remote repository has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "version resolver has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "version range resolver has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "artifact resolver has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "metadata resolver has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "artifact descriptor reader has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "dependency collector has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "installer has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "deployer has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "local repository provider has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "sync context factory has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "remote repository manager has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "dependency node or collect request missing" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( e.getMessage(), e );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:            throw new IllegalArgumentException( "Invalid repository system session: the session may not be null." );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultRepositorySystem.java:        throw new IllegalArgumentException( "Invalid repository system session: " + name + " is not set." );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultTransporterProvider.java:            throw new IllegalArgumentException( "transporter factory has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultTransporterProvider.java:            throw new IllegalArgumentException( "remote repository has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultUpdateCheckManager.java:            throw new IllegalArgumentException( "update policy analyzer has not been specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultUpdateCheckManager.java:            throw new IllegalArgumentException( String.format( "The artifact '%s' has no file attached", artifact ) );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/DefaultUpdateCheckManager.java:            throw new IllegalArgumentException( String.format( "The metadata '%s' has no file attached", metadata ) );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/EnhancedLocalRepositoryManager.java:            throw new IllegalArgumentException( "artifact to register not specified" );
> ./maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/SimpleLocalRepositoryManager.java:            throw new IllegalArgumentException( "base directory has not been specified" );
> ./maven-resolver-impl/src/test/java/org/eclipse/aether/internal/impl/DefaultDependencyCollectorTest.java:            throw new IllegalArgumentException( "Illegal coordinates for child", e );
> ./maven-resolver-impl/src/test/java/org/eclipse/aether/internal/impl/DefaultDependencyCollectorTest.java:            throw new IllegalArgumentException( "Illegal coordinates for child", e );
> ./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/layout/RepositoryLayout.java:                throw new IllegalArgumentException( "resource location must not have query parameters: " + location );
> ./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/layout/RepositoryLayout.java:                throw new IllegalArgumentException( "resource location must not have a fragment: " + location );
> ./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/layout/RepositoryLayout.java:                throw new IllegalArgumentException( "checksum algorithm has not been specified" );
> ./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/layout/RepositoryLayout.java:                throw new IllegalArgumentException( "checksum location has not been specified" );
> ./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/layout/RepositoryLayout.java:                throw new IllegalArgumentException( "checksum location must be relative" );
> ./maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/transport/TransportTask.java:            throw new IllegalArgumentException( "resource location has not been specified" );
> ./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/ArtifactDefinition.java:            throw new IllegalArgumentException( "Need definition like 'gid:aid:ext:ver[:scope]', but was: "
> ./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/DependencyGraphParser.java:                    throw new IllegalArgumentException( "not enough substitutions to fill placeholders" );
> ./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/DependencyGraphParser.java:                    throw new IllegalArgumentException( "undefined reference " + reference );
> ./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/DependencyGraphParser.java:            throw new IllegalArgumentException( "dangling node: " + def );
> ./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/DependencyGraphParser.java:            throw new IllegalArgumentException( "inconsistent leveling (parent for level 0?): " + def );
> ./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/DependencyGraphParser.java:                throw new IllegalArgumentException( "bad version: " + e.getMessage(), e );
> ./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/IniArtifactDataReader.java:                throw new IllegalArgumentException( "Need definition like 'gid:aid:ext:ver[:scope]', but was: "
> ./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/NodeBuilder.java:                throw new IllegalArgumentException( "bad version: " + e.getMessage(), e );
> ./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/NodeDefinition.java:            throw new IllegalArgumentException( "bad syntax: " + def );
> ./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/TestDependencyGraphTransformationContext.java:            throw new IllegalArgumentException( "key must not be null" );
> ./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/TestDependencyGraphTransformationContext.java:            throw new IllegalArgumentException( "key must not be null" );
> ./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/TestVersionConstraint.java:            throw new IllegalArgumentException( "version range missing" );
> ./maven-resolver-test-util/src/main/java/org/eclipse/aether/internal/test/util/TestVersionConstraint.java:            throw new IllegalArgumentException( "version missing" );
> ./maven-resolver-transport-file/src/main/java/org/eclipse/aether/transport/file/FileTransporter.java:            throw new IllegalArgumentException( "Illegal resource path: " + path );
> ./maven-resolver-transport-wagon/src/main/java/org/eclipse/aether/internal/transport/wagon/PlexusWagonConfigurator.java:            throw new IllegalArgumentException( "plexus container has not been specified" );
> ./maven-resolver-transport-wagon/src/main/java/org/eclipse/aether/internal/transport/wagon/PlexusWagonConfigurator.java:            throw new IllegalArgumentException( "Unexpected configuration type: " + configuration.getClass().getName() );
> ./maven-resolver-transport-wagon/src/main/java/org/eclipse/aether/internal/transport/wagon/PlexusWagonProvider.java:            throw new IllegalArgumentException( "plexus container has not been specified" );
> ./maven-resolver-transport-wagon/src/test/java/org/eclipse/aether/transport/wagon/AbstractWagonTransporterTest.java:                throw new IllegalArgumentException( "Unknown wagon role: " + roleHint );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/artifact/DelegatingArtifact.java:            throw new IllegalArgumentException( "delegate artifact not specified" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/artifact/SubArtifact.java:            throw new IllegalArgumentException( "no artifact specified" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/concurrency/RunnableErrorForwarder.java:            throw new IllegalArgumentException( "runnable missing" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/filter/NotDependencyFilter.java:            throw new IllegalArgumentException( "no filter specified" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/transformer/ConflictResolver.java:            throw new IllegalArgumentException( "version selector not specified" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/transformer/ConflictResolver.java:            throw new IllegalArgumentException( "scope selector not specified" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/transformer/ConflictResolver.java:            throw new IllegalArgumentException( "scope deriver not specified" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/transformer/ConflictResolver.java:            throw new IllegalArgumentException( "optionality selector not specified" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/visitor/FilteringDependencyVisitor.java:            throw new IllegalArgumentException( "dependency visitor not specified" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/graph/visitor/TreeDependencyVisitor.java:            throw new IllegalArgumentException( "no visitor delegate specified" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/ComponentAuthentication.java:            throw new IllegalArgumentException( "authentication key missing" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/ConservativeAuthenticationSelector.java:            throw new IllegalArgumentException( "no authentication selector specified" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/ConservativeProxySelector.java:            throw new IllegalArgumentException( "no proxy selector specified" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/DefaultProxySelector.java:            throw new IllegalArgumentException( "proxy not specified" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/SecretAuthentication.java:            throw new IllegalArgumentException( "authentication key missing" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/repository/StringAuthentication.java:            throw new IllegalArgumentException( "authentication key missing" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/version/GenericVersionConstraint.java:            throw new IllegalArgumentException( "version range missing" );
> ./maven-resolver-util/src/main/java/org/eclipse/aether/util/version/GenericVersionConstraint.java:            throw new IllegalArgumentException( "version missing" );
> ./maven-resolver-util/src/test/java/org/eclipse/aether/util/graph/transformer/JavaScopeSelectorTest.java:            throw new IllegalArgumentException( "Illegal coordinates for child", e );
> ./maven-resolver-util/src/test/java/org/eclipse/aether/util/graph/transformer/JavaScopeSelectorTest.java:            throw new IllegalArgumentException( "Illegal coordinates for child", e );
> ./maven-resolver-util/src/test/java/org/eclipse/aether/util/graph/versions/AbstractVersionFilterTest.java:            throw new IllegalArgumentException( e );
> ./maven-resolver-util/src/test/java/org/eclipse/aether/util/version/UnionVersionRangeTest.java:            throw new IllegalArgumentException( e );
> ./maven-resolver-util/src/test/java/org/eclipse/aether/util/version/UnionVersionRangeTest.java:                throw new IllegalArgumentException( e );
> {noformat}



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