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 org.apache.maven.artifact.Artifact; import org.apache.maven.artifact.metadata.ArtifactMetadataRetrievalException; import org.apache.maven.artifact.versioning.ArtifactVersion; import org.apache.maven.artifact.versioning.InvalidVersionSpecificationException; import org.apache.maven.artifact.versioning.VersionRange; import org.apache.maven.plugin.MojoExecutionException; import org.apache.maven.plugin.MojoFailureException; import org.codehaus.mojo.versions.api.PomHelper; import org.codehaus.mojo.versions.rewriting.ModifiedPomXMLEventReader; import javax.xml.stream.XMLStreamException; /** * Sets the parent version to the latest parent version. * * @author Stephen Connolly * @goal update-parent * @requiresProject true * @requiresDirectInvocation true * @since 1.0-alpha-1 */ public class UpdateParentMojo extends AbstractVersionsUpdaterMojo { // ------------------------------ FIELDS ------------------------------ /** * Version specification to control artifact resolution. * * @parameter property="parentVersion" * @since 1.0-alpha-1 */ protected String parentVersion = null; // -------------------------- OTHER METHODS -------------------------- /** * @param pom the pom to update. * @throws MojoExecutionException when things go wrong * @throws MojoFailureException when things go wrong in a very bad way * @throws XMLStreamException when things go wrong with XML streaming * @see AbstractVersionsUpdaterMojo#update(ModifiedPomXMLEventReader) * @since 1.0-alpha-1 */ protected void update(ModifiedPomXMLEventReader pom) throws MojoExecutionException, MojoFailureException, XMLStreamException { if (getProject().getParent() == null) { getLog().info("Project does not have a parent"); return; } if (reactorProjects.contains(getProject().getParent())) { getLog().info("Project's parent is part of the reactor"); return; } String currentVersion = getProject().getParent().getVersion(); String version = currentVersion; if (parentVersion != null) { version = parentVersion; } VersionRange versionRange; try { versionRange = VersionRange.createFromVersionSpec(version); } catch (InvalidVersionSpecificationException e) { throw new MojoExecutionException("Invalid version range specification: " + version, e); } Artifact artifact = artifactFactory.createDependencyArtifact(getProject().getParent().getGroupId(), getProject().getParent().getArtifactId(), versionRange, "pom", null, null); ArtifactVersion artifactVersion; try { artifactVersion = findLatestVersion(artifact, versionRange, null, false); } catch (ArtifactMetadataRetrievalException e) { throw new MojoExecutionException(e.getMessage(), e); } if (!shouldApplyUpdate(artifact, currentVersion, artifactVersion)) { return; } getLog().info("Updating parent from " + currentVersion + " to " + artifactVersion.toString()); if (PomHelper.setProjectParentVersion(pom, artifactVersion.toString())) { getLog().debug("Made an update from " + currentVersion + " to " + artifactVersion.toString()); } } }