Java tutorial
package org.codehaus.mojo.versions; /* * 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.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.Collections; import java.util.Iterator; import java.util.LinkedHashSet; import java.util.List; import java.util.Map; import java.util.Set; import javax.xml.stream.XMLStreamException; import org.apache.maven.artifact.ArtifactUtils; import org.apache.maven.model.Dependency; import org.apache.maven.model.Model; import org.apache.maven.model.Parent; import org.apache.maven.plugin.MojoExecutionException; import org.apache.maven.plugin.MojoFailureException; import org.apache.maven.project.MavenProject; import org.codehaus.mojo.versions.api.PomHelper; import org.codehaus.mojo.versions.change.VersionChange; import org.codehaus.mojo.versions.change.VersionChanger; import org.codehaus.mojo.versions.change.VersionChangerFactory; import org.codehaus.mojo.versions.ordering.ReactorDepthComparator; import org.codehaus.mojo.versions.rewriting.ModifiedPomXMLEventReader; import org.codehaus.mojo.versions.utils.ContextualLog; import org.codehaus.mojo.versions.utils.DelegatingContextualLog; import org.codehaus.plexus.util.StringUtils; /** * Sets the current projects version, updating the details of any child modules as necessary. * * @author axet based on Stephen Connolly */ public class SwitchMojo extends AbstractVersionsUpdaterMojo { /** * The new version number to set. * * @parameter expression="${newVersion}" * @since 1.0-beta-1 */ private String newVersion; /** * The changes to module coordinates. Guarded by this. */ final transient List sourceChanges = new ArrayList(); synchronized void addChange(String groupId, String artifactId, String oldVersion, String newVersion) { if (!newVersion.equals(oldVersion)) { VersionChange vv = new VersionChange(groupId, artifactId, oldVersion, newVersion); for (Object v : sourceChanges) { VersionChange q = (VersionChange) v; if (q.getGroupId().equals(groupId) && q.getArtifactId().equals(artifactId) && q.getOldVersion().equals(oldVersion)) return; } sourceChanges.add(vv); } } static String incrementVersion(String version) { String[] vv = version.split("\\."); Integer v = Integer.parseInt(vv[vv.length - 1]); v++; String newVersion = ""; for (int i = 0; i < vv.length - 1; i++) { newVersion += vv[i] + "."; } newVersion += v; return newVersion; } synchronized String updateSuffix(String groupId, String artifactId, String version) { return version; } synchronized String incrementModuleVersion(String groupId, String artifactId, String version) { return version; } /** * Called when this mojo is executed. * * @throws org.apache.maven.plugin.MojoExecutionException * when things go wrong. * @throws org.apache.maven.plugin.MojoFailureException * when things go wrong. */ public void execute() throws MojoExecutionException, MojoFailureException { if (!StringUtils.isEmpty(getNewVersion())) { addChange(getProject().getGroupId(), getProject().getArtifactId(), getProject().getVersion(), getNewVersion()); processAllDeps(getProject().getGroupId(), getProject().getArtifactId(), getProject().getVersion()); updateModuleVersion(getProject().getGroupId(), getProject().getArtifactId(), getProject().getVersion(), getNewVersion()); } processAllModules(); processAll(); } public void processAllDeps(String groupId, String artifactId, String version) throws MojoExecutionException, MojoFailureException { try { final MavenProject project = PomHelper.getLocalRoot(projectBuilder, getProject(), localRepository, null, getLog()); getLog().info("Process All Modules Local aggregation root: " + project.getBasedir()); final Map<String, Model> reactor = PomHelper.getReactorModels(project, getLog()); final List<String> order = new ArrayList<String>(reactor.keySet()); Collections.sort(order, new ReactorDepthComparator(reactor)); final Iterator i = order.iterator(); while (i.hasNext()) { final String sourcePath = (String) i.next(); final Model sourceModel = (Model) reactor.get(sourcePath); getLog().debug(sourcePath.length() == 0 ? "Process All Modules Processing root module as parent" : "Processing " + sourcePath + " as a parent."); final String sourceGroupId = PomHelper.getGroupId(sourceModel); if (sourceGroupId == null) { getLog().warn("Module " + sourcePath + " is missing a groupId."); continue; } final String sourceArtifactId = PomHelper.getArtifactId(sourceModel); if (sourceArtifactId == null) { getLog().warn("Module " + sourcePath + " is missing an artifactId."); continue; } final String sourceVersion = PomHelper.getVersion(sourceModel); if (sourceVersion == null) { getLog().warn("Module " + sourcePath + " is missing a version."); continue; } if (PomHelper.isExplicitVersion(sourceModel)) { List<Dependency> dd = sourceModel.getDependencies(); for (Dependency d : dd) { if (d.getArtifactId().equals(artifactId) && d.getGroupId().equals(groupId) && d.getVersion().equals(version)) { String newVersion2 = incrementModuleVersion(PomHelper.getGroupId(sourceModel), PomHelper.getArtifactId(sourceModel), PomHelper.getVersion(sourceModel)); if (!newVersion2.equals(sourceModel.getVersion())) { updateModuleVersion(PomHelper.getGroupId(sourceModel), PomHelper.getArtifactId(sourceModel), PomHelper.getVersion(sourceModel), newVersion2); } } } } } } catch (IOException e) { throw new MojoExecutionException(e.getMessage(), e); } } public void processAllModules() throws MojoExecutionException, MojoFailureException { try { final MavenProject project = PomHelper.getLocalRoot(projectBuilder, getProject(), localRepository, null, getLog()); getLog().info("Process All Modules Local aggregation root: " + project.getBasedir()); final Map<String, Model> reactor = PomHelper.getReactorModels(project, getLog()); final List<String> order = new ArrayList<String>(reactor.keySet()); Collections.sort(order, new ReactorDepthComparator(reactor)); final Iterator i = order.iterator(); while (i.hasNext()) { final String sourcePath = (String) i.next(); final Model sourceModel = (Model) reactor.get(sourcePath); getLog().debug(sourcePath.length() == 0 ? "Process All Modules Processing root module as parent" : "Processing " + sourcePath + " as a parent."); final String sourceGroupId = PomHelper.getGroupId(sourceModel); if (sourceGroupId == null) { getLog().warn("Module " + sourcePath + " is missing a groupId."); continue; } final String sourceArtifactId = PomHelper.getArtifactId(sourceModel); if (sourceArtifactId == null) { getLog().warn("Module " + sourcePath + " is missing an artifactId."); continue; } final String sourceVersion = PomHelper.getVersion(sourceModel); if (sourceVersion == null) { getLog().warn("Module " + sourcePath + " is missing a version."); continue; } String newVersion = updateSuffix(PomHelper.getGroupId(sourceModel), PomHelper.getArtifactId(sourceModel), PomHelper.getVersion(sourceModel)); updateModuleVersion(PomHelper.getGroupId(sourceModel), PomHelper.getArtifactId(sourceModel), PomHelper.getVersion(sourceModel), newVersion); } } catch (IOException e) { throw new MojoExecutionException(e.getMessage(), e); } } final Set<File> files = new LinkedHashSet<File>(); public void updateModuleVersion(String groupId, String artifactId, String version, String newVersion) throws MojoExecutionException, MojoFailureException { // this is the triggering change addChange(groupId, artifactId, version, newVersion); try { final MavenProject project = PomHelper.getLocalRoot(projectBuilder, getProject(), localRepository, null, getLog()); getLog().info("Local aggregation root: " + project.getBasedir()); final Map<String, Model> reactor = PomHelper.getReactorModels(project, getLog()); // now fake out the triggering change final Model current = PomHelper.getModel(reactor, getProject().getGroupId(), getProject().getArtifactId()); current.setVersion(newVersion); files.add(getProject().getFile()); final List<String> order = new ArrayList<String>(reactor.keySet()); Collections.sort(order, new ReactorDepthComparator(reactor)); final Iterator i = order.iterator(); while (i.hasNext()) { final String sourcePath = (String) i.next(); final Model sourceModel = (Model) reactor.get(sourcePath); getLog().debug(sourcePath.length() == 0 ? "Processing root module as parent" : "Processing " + sourcePath + " as a parent."); final String sourceGroupId = PomHelper.getGroupId(sourceModel); if (sourceGroupId == null) { getLog().warn("Module " + sourcePath + " is missing a groupId."); continue; } final String sourceArtifactId = PomHelper.getArtifactId(sourceModel); if (sourceArtifactId == null) { getLog().warn("Module " + sourcePath + " is missing an artifactId."); continue; } final String sourceVersion = PomHelper.getVersion(sourceModel); if (sourceVersion == null) { getLog().warn("Module " + sourcePath + " is missing a version."); continue; } final File moduleDir = new File(project.getBasedir(), sourcePath); final File moduleProjectFile; if (moduleDir.isDirectory()) { moduleProjectFile = new File(moduleDir, "pom.xml"); } else { // i don't think this should ever happen... but just in case // the module references the file-name moduleProjectFile = moduleDir; } files.add(moduleProjectFile); getLog().debug("Looking for modules which use " + ArtifactUtils.versionlessKey(sourceGroupId, sourceArtifactId) + " as their parent"); final Iterator j = PomHelper.getChildModels(reactor, sourceGroupId, sourceArtifactId).entrySet() .iterator(); while (j.hasNext()) { final Map.Entry target = (Map.Entry) j.next(); final String targetPath = (String) target.getKey(); final Model targetModel = (Model) target.getValue(); final Parent parent = targetModel.getParent(); getLog().debug("Module: " + targetPath); if (sourceVersion.equals(parent.getVersion())) { getLog().debug(" parent already is " + ArtifactUtils.versionlessKey(sourceGroupId, sourceArtifactId) + ":" + sourceVersion); } else { getLog().debug( " parent is " + ArtifactUtils.versionlessKey(sourceGroupId, sourceArtifactId) + ":" + parent.getVersion()); getLog().debug( " will become " + ArtifactUtils.versionlessKey(sourceGroupId, sourceArtifactId) + ":" + sourceVersion); } final boolean targetExplicit = PomHelper.isExplicitVersion(targetModel); Boolean updateMatchingVersions = true; if ((updateMatchingVersions.booleanValue() || !targetExplicit) && StringUtils.equals(parent.getVersion(), PomHelper.getVersion(targetModel))) { getLog().debug(" module is " + ArtifactUtils.versionlessKey(PomHelper.getGroupId(targetModel), PomHelper.getArtifactId(targetModel)) + ":" + PomHelper.getVersion(targetModel)); getLog().debug( " will become " + ArtifactUtils.versionlessKey(PomHelper.getGroupId(targetModel), PomHelper.getArtifactId(targetModel)) + ":" + sourceVersion); addChange(PomHelper.getGroupId(targetModel), PomHelper.getArtifactId(targetModel), PomHelper.getVersion(targetModel), sourceVersion); targetModel.setVersion(sourceVersion); } else { getLog().debug(" module is " + ArtifactUtils.versionlessKey(PomHelper.getGroupId(targetModel), PomHelper.getArtifactId(targetModel)) + ":" + PomHelper.getVersion(targetModel)); } } } } catch (IOException e) { throw new MojoExecutionException(e.getMessage(), e); } } void processAll() throws MojoExecutionException, MojoFailureException { // now process all the updates final Iterator k = files.iterator(); while (k.hasNext()) { process((File) k.next()); } } /** * Updates the pom file. * * @param pom * The pom file to update. * @throws org.apache.maven.plugin.MojoExecutionException * when things go wrong. * @throws org.apache.maven.plugin.MojoFailureException * when things go wrong. * @throws javax.xml.stream.XMLStreamException * when things go wrong. */ protected synchronized void update(ModifiedPomXMLEventReader pom) throws MojoExecutionException, MojoFailureException, XMLStreamException { ContextualLog log = new DelegatingContextualLog(getLog()); try { Model model = PomHelper.getRawModel(pom); log.setContext("Processing " + PomHelper.getGroupId(model) + ":" + PomHelper.getArtifactId(model)); VersionChangerFactory versionChangerFactory = new VersionChangerFactory(); versionChangerFactory.setPom(pom); versionChangerFactory.setLog(log); versionChangerFactory.setModel(model); boolean processParent = true; boolean processProject = true; boolean processDependencies = true; boolean processPlugins = true; VersionChanger changer = versionChangerFactory.newVersionChanger(processParent, processProject, processDependencies, processPlugins); Iterator i = sourceChanges.iterator(); while (i.hasNext()) { VersionChange versionChange = (VersionChange) i.next(); changer.apply(versionChange); } } catch (IOException e) { throw new MojoExecutionException(e.getMessage(), e); } log.clearContext(); } public String getNewVersion() { return newVersion; } public void setNewVersion(String newVersion) { this.newVersion = newVersion; } }