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Posted to dev@maven.apache.org by Kris Bravo <kr...@corridor-software.us> on 2005/07/08 07:29:41 UTC
[M2]NullPointerException on getCompileClasspathElements()
I have the following handle to the MavenProject defined in a plugin
written for maven 2.
/**
* The project whose project files to create.
*
* @parameter expression="${project}"
* @required
*/
private MavenProject project;
When I attempt to get the list of classpath elements, i.e.,
project.getCompileClasspathElements()
I receive a null pointer exception due to a call to
getArtifacts().size();
java.lang.NullPointerException
at
org.apache.maven.project.MavenProject.getCompileClasspathElements(MavenProject.java:282)
at
org.apache.maven.plugin.xmlbeans.XmlBeansPlugin.getClasspath(XmlBeansPlugin.java:271)
at
org.apache.maven.plugin.xmlbeans.ParameterAdapter.getCompilerParameters(ParameterAdapter.java:31)
at
org.apache.maven.plugin.xmlbeans.XmlBeansPlugin.execute(XmlBeansPlugin.java:203)
at
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:401)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:169)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:143)
Is there another way to retrieve a List of the classpath elements used
by the java compiler during a build? Also, the debug lists elements
(calls them constituents) in the classpath, but doesn't include those
defined in the dependencies section of the pom.
Am I barking up the wrong tree?
Kris
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Re: [M2]NullPointerException on getCompileClasspathElements()
Posted by Vincent Siveton <vi...@gmail.com>.
Already added in jira:
http://jira.codehaus.org/browse/MNG-556
Cheers,
Vincent
2005/7/8, Kris Bravo <kr...@corridor-software.us>:
> Thanks Kenney, that fixed the problem. At the same time, it would be
> helpful if the error explained this nuance.
>
> Before I add to Jira, can we assume that MavenProject.getArtifacts()
> should *never* return null for a valid project with resolved
> dependencies? If so, the method could throw an
> DependencyResolutionRequiredException instead:
>
> "Dependencies have not been resolved. If this is a plugin, verify that
> @requiresDependencyResolution is set in the mojo object. See the
> developer's documentation for more detail."
>
> Thoughts?
>
> Kris
>
> On Fri, 2005-07-08 at 09:29 +0200, Kenney Westerhof wrote:
> > On Fri, 8 Jul 2005, Kris Bravo wrote:
> >
> > You should define
> >
> > @requiresDependencyResolution compile
> >
> > in the class-level javadoc.
> >
> > > I have the following handle to the MavenProject defined in a plugin
> > > written for maven 2.
> > >
> > > /**
> > > * The project whose project files to create.
> > > *
> > > * @parameter expression="${project}"
> > > * @required
> > > */
> > > private MavenProject project;
> > >
> > > When I attempt to get the list of classpath elements, i.e.,
> > >
> > > project.getCompileClasspathElements()
> > >
> > > I receive a null pointer exception due to a call to
> > > getArtifacts().size();
> > >
> > > java.lang.NullPointerException
> > > at
> > > org.apache.maven.project.MavenProject.getCompileClasspathElements(MavenProject.java:282)
> > > at
> > > org.apache.maven.plugin.xmlbeans.XmlBeansPlugin.getClasspath(XmlBeansPlugin.java:271)
> > > at
> > > org.apache.maven.plugin.xmlbeans.ParameterAdapter.getCompilerParameters(ParameterAdapter.java:31)
> > > at
> > > org.apache.maven.plugin.xmlbeans.XmlBeansPlugin.execute(XmlBeansPlugin.java:203)
> > > at
> > > org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:401)
> > > at
> > > org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:169)
> > > at
> > > org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:143)
> > >
> > > Is there another way to retrieve a List of the classpath elements used
> > > by the java compiler during a build? Also, the debug lists elements
> > > (calls them constituents) in the classpath, but doesn't include those
> > > defined in the dependencies section of the pom.
> > >
> > > Am I barking up the wrong tree?
> > >
> > > Kris
> > >
> > >
> > >
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: dev-unsubscribe@maven.apache.org
> > > For additional commands, e-mail: dev-help@maven.apache.org
> > >
> >
> > --
> > Kenney Westerhof
> > http://www.neonics.com
> > GPG public key: http://www.gods.nl/~forge/kenneyw.key
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: dev-unsubscribe@maven.apache.org
> > For additional commands, e-mail: dev-help@maven.apache.org
> >
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: dev-unsubscribe@maven.apache.org
> For additional commands, e-mail: dev-help@maven.apache.org
>
>
---------------------------------------------------------------------
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Re: [M2]NullPointerException on getCompileClasspathElements()
Posted by Kris Bravo <kr...@corridor-software.us>.
Thanks Kenney, that fixed the problem. At the same time, it would be
helpful if the error explained this nuance.
Before I add to Jira, can we assume that MavenProject.getArtifacts()
should *never* return null for a valid project with resolved
dependencies? If so, the method could throw an
DependencyResolutionRequiredException instead:
"Dependencies have not been resolved. If this is a plugin, verify that
@requiresDependencyResolution is set in the mojo object. See the
developer's documentation for more detail."
Thoughts?
Kris
On Fri, 2005-07-08 at 09:29 +0200, Kenney Westerhof wrote:
> On Fri, 8 Jul 2005, Kris Bravo wrote:
>
> You should define
>
> @requiresDependencyResolution compile
>
> in the class-level javadoc.
>
> > I have the following handle to the MavenProject defined in a plugin
> > written for maven 2.
> >
> > /**
> > * The project whose project files to create.
> > *
> > * @parameter expression="${project}"
> > * @required
> > */
> > private MavenProject project;
> >
> > When I attempt to get the list of classpath elements, i.e.,
> >
> > project.getCompileClasspathElements()
> >
> > I receive a null pointer exception due to a call to
> > getArtifacts().size();
> >
> > java.lang.NullPointerException
> > at
> > org.apache.maven.project.MavenProject.getCompileClasspathElements(MavenProject.java:282)
> > at
> > org.apache.maven.plugin.xmlbeans.XmlBeansPlugin.getClasspath(XmlBeansPlugin.java:271)
> > at
> > org.apache.maven.plugin.xmlbeans.ParameterAdapter.getCompilerParameters(ParameterAdapter.java:31)
> > at
> > org.apache.maven.plugin.xmlbeans.XmlBeansPlugin.execute(XmlBeansPlugin.java:203)
> > at
> > org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:401)
> > at
> > org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:169)
> > at
> > org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:143)
> >
> > Is there another way to retrieve a List of the classpath elements used
> > by the java compiler during a build? Also, the debug lists elements
> > (calls them constituents) in the classpath, but doesn't include those
> > defined in the dependencies section of the pom.
> >
> > Am I barking up the wrong tree?
> >
> > Kris
> >
> >
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: dev-unsubscribe@maven.apache.org
> > For additional commands, e-mail: dev-help@maven.apache.org
> >
>
> --
> Kenney Westerhof
> http://www.neonics.com
> GPG public key: http://www.gods.nl/~forge/kenneyw.key
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: dev-unsubscribe@maven.apache.org
> For additional commands, e-mail: dev-help@maven.apache.org
>
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@maven.apache.org
For additional commands, e-mail: dev-help@maven.apache.org
Re: [M2]NullPointerException on getCompileClasspathElements()
Posted by Kenney Westerhof <fo...@neonics.com>.
On Fri, 8 Jul 2005, Kris Bravo wrote:
You should define
@requiresDependencyResolution compile
in the class-level javadoc.
> I have the following handle to the MavenProject defined in a plugin
> written for maven 2.
>
> /**
> * The project whose project files to create.
> *
> * @parameter expression="${project}"
> * @required
> */
> private MavenProject project;
>
> When I attempt to get the list of classpath elements, i.e.,
>
> project.getCompileClasspathElements()
>
> I receive a null pointer exception due to a call to
> getArtifacts().size();
>
> java.lang.NullPointerException
> at
> org.apache.maven.project.MavenProject.getCompileClasspathElements(MavenProject.java:282)
> at
> org.apache.maven.plugin.xmlbeans.XmlBeansPlugin.getClasspath(XmlBeansPlugin.java:271)
> at
> org.apache.maven.plugin.xmlbeans.ParameterAdapter.getCompilerParameters(ParameterAdapter.java:31)
> at
> org.apache.maven.plugin.xmlbeans.XmlBeansPlugin.execute(XmlBeansPlugin.java:203)
> at
> org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:401)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:169)
> at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:143)
>
> Is there another way to retrieve a List of the classpath elements used
> by the java compiler during a build? Also, the debug lists elements
> (calls them constituents) in the classpath, but doesn't include those
> defined in the dependencies section of the pom.
>
> Am I barking up the wrong tree?
>
> Kris
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: dev-unsubscribe@maven.apache.org
> For additional commands, e-mail: dev-help@maven.apache.org
>
--
Kenney Westerhof
http://www.neonics.com
GPG public key: http://www.gods.nl/~forge/kenneyw.key
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