| /* |
| * 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. |
| * |
| */ |
| package org.apache.ivy.plugins.circular; |
| |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.apache.ivy.core.module.descriptor.ModuleDescriptor; |
| import org.apache.ivy.core.module.id.ModuleRevisionId; |
| |
| public final class CircularDependencyHelper { |
| |
| /** CircularDependencyHelper is not designed to be an instance */ |
| private CircularDependencyHelper() { |
| |
| } |
| |
| /** |
| * Returns a string representation of this circular dependency graph |
| * |
| * @param descriptors |
| * in order of circular dependency |
| * @return a string representation of this circular dependency graph |
| */ |
| public static String formatMessage(final ModuleRevisionId[] mrids) { |
| Set alreadyAdded = new HashSet(); |
| StringBuffer buff = new StringBuffer(); |
| buff.append(mrids[0]); |
| alreadyAdded.add(mrids[0]); |
| for (int i = 1; i < mrids.length; i++) { |
| buff.append("->"); |
| if (alreadyAdded.add(mrids[i])) { |
| buff.append(mrids[i]); |
| } else { |
| buff.append("..."); |
| break; |
| } |
| } |
| return buff.toString(); |
| } |
| |
| public static String formatMessage(final ModuleDescriptor[] descriptors) { |
| return formatMessage(toMrids(descriptors)); |
| } |
| |
| /** |
| * @param loopElements |
| * a List<ModuleDescriptor> |
| */ |
| public static String formatMessageFromDescriptors(List loopElements) { |
| ModuleRevisionId[] mrids = new ModuleRevisionId[loopElements.size()]; |
| int pos = 0; |
| for (Iterator it = loopElements.iterator(); it.hasNext();) { |
| ModuleDescriptor descriptor = (ModuleDescriptor) it.next(); |
| mrids[pos] = descriptor.getModuleRevisionId(); |
| pos++; |
| } |
| return formatMessage(mrids); |
| } |
| |
| public static ModuleRevisionId[] toMrids(ModuleDescriptor[] descriptors) { |
| ModuleRevisionId[] mrids = new ModuleRevisionId[descriptors.length]; |
| for (int i = 0; i < descriptors.length; i++) { |
| mrids[i] = descriptors[i].getModuleRevisionId(); |
| } |
| return mrids; |
| } |
| |
| } |