Java tutorial
package org.apache.archiva.model; /* * 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.commons.lang.StringUtils; /** * Keys - utility methods for converting common objects into string keys. * * */ public class Keys { public static String toKey(String groupId, String artifactId, String version, String classifier, String type) { StringBuilder key = new StringBuilder(); key.append(groupId).append(":"); key.append(artifactId).append(":"); key.append(version).append(":"); key.append(StringUtils.defaultString(classifier)).append(":"); key.append(type); return key.toString(); } public static String toKey(ArtifactReference ref) { return toKey(ref.getGroupId(), ref.getArtifactId(), ref.getVersion(), ref.getClassifier(), ref.getType()); } public static String toKey(ProjectReference ref) { StringBuilder key = new StringBuilder(); key.append(ref.getGroupId()).append(":"); key.append(ref.getArtifactId()); return key.toString(); } public static String toKey(String groupId, String artifactId, String version) { StringBuilder key = new StringBuilder(); key.append(groupId).append(":"); key.append(artifactId).append(":"); key.append(version); return key.toString(); } public static String toKey(VersionedReference ref) { return toKey(ref.getGroupId(), ref.getArtifactId(), ref.getVersion()); } }