001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.maven.resolver.examples;
020
021import java.util.List;
022
023import org.apache.maven.resolver.examples.util.Booter;
024import org.eclipse.aether.RepositorySystem;
025import org.eclipse.aether.RepositorySystemSession.CloseableSession;
026import org.eclipse.aether.artifact.Artifact;
027import org.eclipse.aether.artifact.DefaultArtifact;
028import org.eclipse.aether.collection.CollectRequest;
029import org.eclipse.aether.graph.Dependency;
030import org.eclipse.aether.graph.DependencyFilter;
031import org.eclipse.aether.resolution.ArtifactResult;
032import org.eclipse.aether.resolution.DependencyRequest;
033import org.eclipse.aether.util.artifact.JavaScopes;
034import org.eclipse.aether.util.filter.DependencyFilterUtils;
035
036/**
037 * Resolves the transitive (compile) dependencies of an artifact.
038 */
039public class ResolveTransitiveDependencies {
040
041    /**
042     * Main.
043     * @param args
044     * @throws Exception
045     */
046    public static void main(String[] args) throws Exception {
047        System.out.println("------------------------------------------------------------");
048        System.out.println(ResolveTransitiveDependencies.class.getSimpleName());
049
050        try (RepositorySystem system = Booter.newRepositorySystem(Booter.selectFactory(args));
051                CloseableSession session = Booter.newRepositorySystemSession(system, Booter.selectFs(args))
052                        .build()) {
053            // An "interesting" artifact that depends on itself (different version). All Maven versions
054            // released so far contained dom4j:dom4j:1.5.2 on classpath for dom4j:dom4j:1.6.1
055            // In Resolver 2.0.19+ this is fixed.
056            Artifact artifact = new DefaultArtifact("dom4j:dom4j:1.6.1");
057
058            DependencyFilter classpathFilter = DependencyFilterUtils.classpathFilter(JavaScopes.COMPILE);
059
060            CollectRequest collectRequest = new CollectRequest();
061            collectRequest.setRoot(new Dependency(artifact, JavaScopes.COMPILE));
062            collectRequest.setRepositories(Booter.newRepositories(system, session));
063
064            DependencyRequest dependencyRequest = new DependencyRequest(collectRequest, classpathFilter);
065
066            List<ArtifactResult> artifactResults =
067                    system.resolveDependencies(session, dependencyRequest).getArtifactResults();
068
069            for (ArtifactResult artifactResult : artifactResults) {
070                System.out.println(artifactResult.getArtifact() + " resolved to "
071                        + artifactResult.getArtifact().getPath());
072            }
073        }
074    }
075}