| /* |
| * 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.tools.ant.util; |
| |
| import java.util.List; |
| import java.util.Arrays; |
| import java.util.Iterator; |
| import java.util.ArrayList; |
| |
| /** |
| * A <CODE>ContainerMapper</CODE> that chains the results of the first |
| * nested <CODE>FileNameMapper</CODE>s into sourcefiles for the second, |
| * the second to the third, and so on, returning the resulting mapped |
| * filenames from the last nested <CODE>FileNameMapper</CODE>. |
| */ |
| public class ChainedMapper extends ContainerMapper { |
| |
| /** {@inheritDoc}. */ |
| public String[] mapFileName(String sourceFileName) { |
| List inputs = new ArrayList(); |
| List results = new ArrayList(); |
| results.add(sourceFileName); |
| FileNameMapper mapper = null; |
| |
| for (Iterator mIter = getMappers().iterator(); mIter.hasNext();) { |
| mapper = (FileNameMapper) (mIter.next()); |
| if (mapper != null) { |
| inputs.clear(); |
| inputs.addAll(results); |
| results.clear(); |
| |
| for (Iterator it = inputs.iterator(); it.hasNext();) { |
| String[] mapped = mapper.mapFileName((String) (it.next())); |
| if (mapped != null) { |
| results.addAll(Arrays.asList(mapped)); |
| } |
| } |
| } |
| } |
| return (results.size() == 0) ? null |
| : (String[]) results.toArray(new String[results.size()]); |
| } |
| } |
| |