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Posted to commits@maven.apache.org by sc...@apache.org on 2016/07/01 17:24:30 UTC
maven-aether git commit: Feature: Addition of JavaDependencyMediator.
Blocks MNG-5988.
Repository: maven-aether
Updated Branches:
refs/heads/master 1ee92862c -> 1b4370b1a
Feature: Addition of JavaDependencyMediator. Blocks MNG-5988.
Project: http://git-wip-us.apache.org/repos/asf/maven-aether/repo
Commit: http://git-wip-us.apache.org/repos/asf/maven-aether/commit/1b4370b1
Tree: http://git-wip-us.apache.org/repos/asf/maven-aether/tree/1b4370b1
Diff: http://git-wip-us.apache.org/repos/asf/maven-aether/diff/1b4370b1
Branch: refs/heads/master
Commit: 1b4370b1a4e82ce5dfaaea133b40a7fce801fc52
Parents: 1ee9286
Author: Christian Schulte <sc...@apache.org>
Authored: Fri Jul 1 16:35:43 2016 +0200
Committer: Christian Schulte <sc...@apache.org>
Committed: Fri Jul 1 18:18:00 2016 +0200
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.../transformer/JavaDependencyMediator.java | 124 +++++++++++++++++++
1 file changed, 124 insertions(+)
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http://git-wip-us.apache.org/repos/asf/maven-aether/blob/1b4370b1/aether-util/src/main/java/org/eclipse/aether/util/graph/transformer/JavaDependencyMediator.java
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diff --git a/aether-util/src/main/java/org/eclipse/aether/util/graph/transformer/JavaDependencyMediator.java b/aether-util/src/main/java/org/eclipse/aether/util/graph/transformer/JavaDependencyMediator.java
new file mode 100644
index 0000000..ae385e6
--- /dev/null
+++ b/aether-util/src/main/java/org/eclipse/aether/util/graph/transformer/JavaDependencyMediator.java
@@ -0,0 +1,124 @@
+package org.eclipse.aether.util.graph.transformer;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import java.util.Iterator;
+
+import org.eclipse.aether.RepositoryException;
+import org.eclipse.aether.collection.DependencyGraphTransformationContext;
+import org.eclipse.aether.collection.DependencyGraphTransformer;
+import org.eclipse.aether.graph.DependencyNode;
+import org.eclipse.aether.util.artifact.JavaScopes;
+
+/**
+ * A {@code DependencyGraphTransformer} applying the Maven dependency mediation mechanism.
+ *
+ * @author Christian Schulte
+ * @since 1.2
+ * @see <a href="http://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html#Dependency_Scope">Introduction to the Dependency Mechanism</a>
+ */
+public final class JavaDependencyMediator
+ implements DependencyGraphTransformer
+{
+
+ @Override
+ public DependencyNode transformGraph( final DependencyNode node,
+ final DependencyGraphTransformationContext context )
+ throws RepositoryException
+ {
+ return this.recurse( node );
+ }
+
+ private DependencyNode recurse( final DependencyNode parent )
+ {
+ final String parentScope = parent.getDependency() != null
+ ? parent.getDependency().getScope() != null
+ && parent.getDependency().getScope().length() >= 0
+ ? parent.getDependency().getScope()
+ : JavaScopes.COMPILE
+ : null;
+
+ for ( final Iterator<DependencyNode> it = parent.getChildren().iterator(); it.hasNext(); )
+ {
+ final DependencyNode child = it.next();
+ boolean removed = false;
+
+ if ( parentScope != null )
+ {
+ String childScope = child.getDependency().getScope() != null
+ && child.getDependency().getScope().length() >= 0
+ ? child.getDependency().getScope()
+ : JavaScopes.COMPILE;
+
+ if ( ( child.getManagedBits() & DependencyNode.MANAGED_SCOPE ) == 0 )
+ {
+ // Non-managed child scopes are updated according to the table in the "Dependency Scope" section
+ // of the "Introduction to the Dependency Mechanism" document.
+
+ if ( JavaScopes.PROVIDED.equals( parentScope ) )
+ {
+ // Compile and runtime become provided.
+ if ( JavaScopes.COMPILE.equals( childScope )
+ || JavaScopes.RUNTIME.equals( childScope ) )
+ {
+ childScope = JavaScopes.PROVIDED;
+ child.getDependency().setScope( childScope );
+ }
+ }
+ else if ( JavaScopes.RUNTIME.equals( parentScope ) )
+ {
+ // Compile becomes runtime.
+ if ( JavaScopes.COMPILE.equals( childScope ) )
+ {
+ childScope = JavaScopes.RUNTIME;
+ child.getDependency().setScope( childScope );
+ }
+ }
+ else if ( JavaScopes.TEST.equals( parentScope ) )
+ {
+ // Compile and runtime become test.
+ if ( JavaScopes.COMPILE.equals( childScope )
+ || JavaScopes.RUNTIME.equals( childScope ) )
+ {
+ childScope = JavaScopes.TEST;
+ child.getDependency().setScope( childScope );
+ }
+ }
+ }
+
+ // Provided and test scopes are non-transitive.
+ if ( JavaScopes.PROVIDED.equals( childScope )
+ || JavaScopes.TEST.equals( childScope ) )
+ {
+ it.remove();
+ removed = true;
+ }
+ }
+
+ if ( !removed )
+ {
+ this.recurse( child );
+ }
+ }
+
+ return parent;
+ }
+
+}