| 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; |
| } |
| |
| } |