- /*
- * Copyright 2004 The Apache Software Foundation.
- *
- * Licensed 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;
- import org.apache.tools.ant.types.Mapper;
-
- /**
- * 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 {
-
- //inherit doc
- 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()]);
- }
- }
-