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/*
* 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.Iterator;
import java.util.LinkedHashSet;
/**
* A <code>ContainerMapper</code> that unites the results of its constituent
* <code>FileNameMapper</code>s into a single set of result filenames.
*/
public class CompositeMapper extends ContainerMapper {
/** {@inheritDoc}. */
public String[] mapFileName(String sourceFileName) {
LinkedHashSet results = new LinkedHashSet();
FileNameMapper mapper = null;
for (Iterator mIter = getMappers().iterator(); mIter.hasNext();) {
mapper = (FileNameMapper) (mIter.next());
if (mapper != null) {
String[] mapped = mapper.mapFileName(sourceFileName);
if (mapped != null) {
for (int i = 0; i < mapped.length; i++) {
results.add(mapped[i]);
}
}
}
}
return (results.size() == 0) ? null
: (String[]) results.toArray(new String[results.size()]);
}
}
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