01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: *
17: */
18: package org.apache.tools.ant.util;
19:
20: import java.util.Arrays;
21: import java.util.HashSet;
22: import java.util.Iterator;
23:
24: /**
25: * A <CODE>ContainerMapper</CODE> that unites the results of its constituent
26: * <CODE>FileNameMapper</CODE>s into a single set of result filenames.
27: */
28: public class CompositeMapper extends ContainerMapper {
29:
30: /** {@inheritDoc}. */
31: public String[] mapFileName(String sourceFileName) {
32: HashSet results = new HashSet();
33:
34: FileNameMapper mapper = null;
35: for (Iterator mIter = getMappers().iterator(); mIter.hasNext();) {
36: mapper = (FileNameMapper) (mIter.next());
37: if (mapper != null) {
38: String[] mapped = mapper.mapFileName(sourceFileName);
39: if (mapped != null) {
40: results.addAll(Arrays.asList(mapped));
41: }
42: }
43: }
44: return (results.size() == 0) ? null : (String[]) results
45: .toArray(new String[results.size()]);
46: }
47:
48: }
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