maven-resolver-demos/maven-resolver-demo-snippets/src/main/java/org/apache/maven/resolver/examples/ResolveTransitiveDependencies.java

/*
 * 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.
 */
package org.apache.maven.resolver.examples;

import java.util.List;

import org.apache.maven.resolver.examples.util.Booter;
import org.eclipse.aether.RepositorySystem;
import org.eclipse.aether.RepositorySystemSession.CloseableSession;
import org.eclipse.aether.artifact.Artifact;
import org.eclipse.aether.artifact.DefaultArtifact;
import org.eclipse.aether.collection.CollectRequest;
import org.eclipse.aether.graph.Dependency;
import org.eclipse.aether.graph.DependencyFilter;
import org.eclipse.aether.resolution.ArtifactResult;
import org.eclipse.aether.resolution.DependencyRequest;
import org.eclipse.aether.util.artifact.JavaScopes;
import org.eclipse.aether.util.filter.DependencyFilterUtils;

/**
 * Resolves the transitive (compile) dependencies of an artifact.
 */
public class ResolveTransitiveDependencies {

    /**
     * Main.
     * @param args
     * @throws Exception
     */
    public static void main(String[] args) throws Exception {
        System.out.println("------------------------------------------------------------");
        System.out.println(ResolveTransitiveDependencies.class.getSimpleName());

        try (RepositorySystem system = Booter.newRepositorySystem(Booter.selectFactory(args));
                CloseableSession session =
                        Booter.newRepositorySystemSession(system).build()) {
            Artifact artifact = new DefaultArtifact("org.apache.maven.resolver:maven-resolver-impl:1.3.3");

            DependencyFilter classpathFilter = DependencyFilterUtils.classpathFilter(JavaScopes.COMPILE);

            CollectRequest collectRequest = new CollectRequest();
            collectRequest.setRoot(new Dependency(artifact, JavaScopes.COMPILE));
            collectRequest.setRepositories(Booter.newRepositories(system, session));

            DependencyRequest dependencyRequest = new DependencyRequest(collectRequest, classpathFilter);

            List<ArtifactResult> artifactResults =
                    system.resolveDependencies(session, dependencyRequest).getArtifactResults();

            for (ArtifactResult artifactResult : artifactResults) {
                System.out.println(artifactResult.getArtifact() + " resolved to "
                        + artifactResult.getArtifact().getPath());
            }
        }
    }
}