Java tutorial
package org.apache.maven.repository.internal; /* * 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.Properties; import org.eclipse.aether.DefaultRepositorySystemSession; import org.eclipse.aether.artifact.DefaultArtifactType; import org.eclipse.aether.collection.DependencyGraphTransformer; import org.eclipse.aether.collection.DependencyManager; import org.eclipse.aether.collection.DependencySelector; import org.eclipse.aether.collection.DependencyTraverser; import org.eclipse.aether.impl.ArtifactDescriptorReader; import org.eclipse.aether.impl.DefaultServiceLocator; import org.eclipse.aether.impl.MetadataGeneratorFactory; import org.eclipse.aether.impl.VersionRangeResolver; import org.eclipse.aether.impl.VersionResolver; import org.eclipse.aether.util.artifact.DefaultArtifactTypeRegistry; import org.eclipse.aether.util.graph.manager.ClassicDependencyManager; import org.eclipse.aether.util.graph.selector.AndDependencySelector; import org.eclipse.aether.util.graph.selector.ExclusionDependencySelector; import org.eclipse.aether.util.graph.selector.OptionalDependencySelector; import org.eclipse.aether.util.graph.selector.ScopeDependencySelector; import org.eclipse.aether.util.graph.transformer.ChainedDependencyGraphTransformer; import org.eclipse.aether.util.graph.transformer.ConflictResolver; import org.eclipse.aether.util.graph.transformer.JavaDependencyContextRefiner; import org.eclipse.aether.util.graph.transformer.JavaScopeDeriver; import org.eclipse.aether.util.graph.transformer.JavaScopeSelector; import org.eclipse.aether.util.graph.transformer.NearestVersionSelector; import org.eclipse.aether.util.graph.transformer.SimpleOptionalitySelector; import org.eclipse.aether.util.graph.traverser.FatArtifactTraverser; import org.eclipse.aether.util.repository.SimpleArtifactDescriptorPolicy; /** * A utility class to assist in setting up a Maven-like repository system. <em>Note:</em> This component is meant to * assist those clients that employ the repository system outside of an IoC container, Maven plugins should instead * always use regular dependency injection to acquire the repository system. * * @author Benjamin Bentmann */ public final class MavenRepositorySystemUtils { private MavenRepositorySystemUtils() { // hide constructor } /** * Creates a new service locator that already knows about all service implementations included in this library. To * acquire a complete repository system, clients need to add some repository connectors for remote transfers. * * @return The new service locator, never {@code null}. */ public static DefaultServiceLocator newServiceLocator() { DefaultServiceLocator locator = new DefaultServiceLocator(); locator.addService(ArtifactDescriptorReader.class, DefaultArtifactDescriptorReader.class); locator.addService(VersionResolver.class, DefaultVersionResolver.class); locator.addService(VersionRangeResolver.class, DefaultVersionRangeResolver.class); locator.addService(MetadataGeneratorFactory.class, SnapshotMetadataGeneratorFactory.class); locator.addService(MetadataGeneratorFactory.class, VersionsMetadataGeneratorFactory.class); return locator; } /** * Creates a new Maven-like repository system session by initializing the session with values typical for * Maven-based resolution. In more detail, this method configures settings relevant for the processing of dependency * graphs, most other settings remain at their generic default value. Use the various setters to further configure * the session with authentication, mirror, proxy and other information required for your environment. * * @return The new repository system session, never {@code null}. */ public static DefaultRepositorySystemSession newSession() { DefaultRepositorySystemSession session = new DefaultRepositorySystemSession(); DependencyTraverser depTraverser = new FatArtifactTraverser(); session.setDependencyTraverser(depTraverser); DependencyManager depManager = new ClassicDependencyManager(); session.setDependencyManager(depManager); DependencySelector depFilter = new AndDependencySelector(new ScopeDependencySelector("test", "provided"), new OptionalDependencySelector(), new ExclusionDependencySelector()); session.setDependencySelector(depFilter); DependencyGraphTransformer transformer = new ConflictResolver(new NearestVersionSelector(), new JavaScopeSelector(), new SimpleOptionalitySelector(), new JavaScopeDeriver()); transformer = new ChainedDependencyGraphTransformer(transformer, new JavaDependencyContextRefiner()); session.setDependencyGraphTransformer(transformer); DefaultArtifactTypeRegistry stereotypes = new DefaultArtifactTypeRegistry(); stereotypes.add(new DefaultArtifactType("pom")); stereotypes.add(new DefaultArtifactType("maven-plugin", "jar", "", "java")); stereotypes.add(new DefaultArtifactType("jar", "jar", "", "java")); stereotypes.add(new DefaultArtifactType("ejb", "jar", "", "java")); stereotypes.add(new DefaultArtifactType("ejb-client", "jar", "client", "java")); stereotypes.add(new DefaultArtifactType("test-jar", "jar", "tests", "java")); stereotypes.add(new DefaultArtifactType("javadoc", "jar", "javadoc", "java")); stereotypes.add(new DefaultArtifactType("java-source", "jar", "sources", "java", false, false)); stereotypes.add(new DefaultArtifactType("war", "war", "", "java", false, true)); stereotypes.add(new DefaultArtifactType("ear", "ear", "", "java", false, true)); stereotypes.add(new DefaultArtifactType("rar", "rar", "", "java", false, true)); stereotypes.add(new DefaultArtifactType("par", "par", "", "java", false, true)); session.setArtifactTypeRegistry(stereotypes); session.setArtifactDescriptorPolicy(new SimpleArtifactDescriptorPolicy(true, true)); final Properties systemProperties = new Properties(); // MNG-5670 guard against ConcurrentModificationException // MNG-6053 guard against key without value Properties sysProp = System.getProperties(); synchronized (sysProp) { systemProperties.putAll(sysProp); } session.setSystemProperties(systemProperties); session.setConfigProperties(systemProperties); return session; } }