Java tutorial
/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright (c) 2010-2011 Oracle and/or its affiliates. All rights reserved. * * The contents of this file are subject to the terms of either the GNU * General Public License Version 2 only ("GPL") or the Common Development * and Distribution License("CDDL") (collectively, the "License"). You * may not use this file except in compliance with the License. You can * obtain a copy of the License at * http://glassfish.java.net/public/CDDL+GPL_1_1.html * or packager/legal/LICENSE.txt. See the License for the specific * language governing permissions and limitations under the License. * * When distributing the software, include this License Header Notice in each * file and include the License file at packager/legal/LICENSE.txt. * * GPL Classpath Exception: * Oracle designates this particular file as subject to the "Classpath" * exception as provided by Oracle in the GPL Version 2 section of the License * file that accompanied this code. * * Modifications: * If applicable, add the following below the License Header, with the fields * enclosed by brackets [] replaced by your own identifying information: * "Portions Copyright [year] [name of copyright owner]" * * Contributor(s): * If you wish your version of this file to be governed by only the CDDL or * only the GPL Version 2, indicate your decision by adding "[Contributor] * elects to include this software in this distribution under the [CDDL or GPL * Version 2] license." If you don't indicate a single choice of license, a * recipient has the option to distribute your version of this file under * either the CDDL, the GPL Version 2 or to extend the choice of license to * its licensees as provided above. However, if you add GPL Version 2 code * and therefore, elected the GPL Version 2 license, then the option applies * only if the new code is made subject to such option by the copyright * holder. */ package com.sun.jersey.wadl; import java.util.ArrayList; import java.util.Collection; import java.util.List; import org.apache.maven.artifact.Artifact; import org.apache.maven.artifact.DependencyResolutionRequiredException; import org.apache.maven.artifact.repository.ArtifactRepository; import org.apache.maven.artifact.resolver.ArtifactNotFoundException; import org.apache.maven.artifact.resolver.ArtifactResolutionException; import org.apache.maven.model.Dependency; import org.apache.maven.plugin.AbstractMojo; import org.apache.maven.plugin.MojoExecutionException; import org.apache.maven.project.MavenProject; import com.sun.jersey.wadl.util.Loader; /** * This is a base class for mojos that need to access the project classpath. * */ public abstract class AbstractMojoProjectClasspathSupport extends AbstractMojo { /** * Additional dependencies that shall be made available when running this * goal. Use this when you get e.g. <code>ClassNotFoundException</code>s. * * @parameter property="dependencies" */ private List<com.sun.jersey.wadl.Dependency> _dependencies; /** @parameter expression="${project}" */ private org.apache.maven.project.MavenProject mavenProject; /** @component */ private org.apache.maven.artifact.factory.ArtifactFactory artifactFactory; /** @component */ private org.apache.maven.artifact.resolver.ArtifactResolver resolver; /**@parameter expression="${localRepository}" */ private org.apache.maven.artifact.repository.ArtifactRepository localRepository; /** @parameter expression="${project.remoteArtifactRepositories}" */ private java.util.List<ArtifactRepository> remoteRepositories; public final void execute() throws MojoExecutionException { final List<String> classpathElements; try { classpathElements = getClasspathElements(mavenProject, _dependencies); } catch (Exception e) { getLog().error(e); throw new MojoExecutionException("Could not create the list of classpath elements.", e); } final ClassLoader cl = Thread.currentThread().getContextClassLoader(); final ClassLoader ncl = new Loader(classpathElements.toArray(new String[0]), this.getClass().getClassLoader()); Thread.currentThread().setContextClassLoader(ncl); try { executeWithClasspath(classpathElements); } catch (MojoExecutionException e) { throw e; } catch (Exception e) { getLog().error(e); throw new MojoExecutionException("Could not execute mojo", e); } finally { Thread.currentThread().setContextClassLoader(cl); } } protected abstract void executeWithClasspath(List<String> classpathElements) throws MojoExecutionException; /** * Create a list of classpath elements including declared build dependencies, the build * output directory and additionally configured dependencies. * @param mavenProject * @param additionalDependencies * @return a list of classpath elements * @throws DependencyResolutionRequiredException * @throws ArtifactResolutionException * @throws ArtifactNotFoundException * @author Martin Grotzke */ protected List<String> getClasspathElements(final MavenProject mavenProject, final List<com.sun.jersey.wadl.Dependency> additionalDependencies) throws DependencyResolutionRequiredException, ArtifactResolutionException, ArtifactNotFoundException { final List<String> paths = new ArrayList<String>(); /* Add maven compile classpath elements */ @SuppressWarnings("unchecked") final List<String> compileClasspathElements = mavenProject.getCompileClasspathElements(); paths.addAll(compileClasspathElements); /* Add build dependencies as classpath elements */ @SuppressWarnings("unchecked") final Collection<Dependency> dependencies = mavenProject.getDependencies(); if (dependencies != null) { for (Dependency dependency : dependencies) { if (dependency.getSystemPath() != null) { getLog().debug("Adding dependency with systemPath " + dependency.getSystemPath()); paths.add(dependency.getSystemPath()); } else { final Artifact artifact = artifactFactory.createArtifactWithClassifier(dependency.getGroupId(), dependency.getArtifactId(), dependency.getVersion(), dependency.getType(), dependency.getClassifier()); resolver.resolve(artifact, remoteRepositories, localRepository); getLog().debug("Adding artifact " + artifact.getFile().getPath()); paths.add(artifact.getFile().getPath()); } } } /* Add additional dependencies */ if (additionalDependencies != null) { for (com.sun.jersey.wadl.Dependency dependency : additionalDependencies) { if (dependency.getSystemPath() != null) { getLog().debug("Adding additional dependency with systemPath " + dependency.getSystemPath()); paths.add(dependency.getSystemPath()); } else { final Artifact artifact = artifactFactory.createArtifactWithClassifier(dependency.getGroupId(), dependency.getArtifactId(), dependency.getVersion(), "jar", null); resolver.resolve(artifact, remoteRepositories, localRepository); getLog().debug("Adding additional artifact " + artifact.getFile().getPath()); paths.add(artifact.getFile().getPath()); } } } return paths; } /** * @param dependencies the dependencies to set * @author Martin Grotzke */ public void setDependencies(List<com.sun.jersey.wadl.Dependency> dependencies) { _dependencies = dependencies; } }