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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.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.apache.tools.ant.types.Mapper;
/**
* A <code>FileNameMapper</code> that contains
* other <code>FileNameMapper</code>s.
* @see FileNameMapper
*/
public abstract class ContainerMapper implements FileNameMapper {
private List mappers = new ArrayList();
/**
* Add a <code>Mapper</code>.
* @param mapper the <code>Mapper</code> to add.
*/
public void addConfiguredMapper(Mapper mapper) {
add(mapper.getImplementation());
}
/**
* An add configured version of the add method.
* This class used to contain an add method and an
* addConfiguredMapper method. Dur to ordering,
* the add method was always called first. This
* addConfigured method has been added to allow
* chaining to work correctly.
* @param fileNameMapper a <code>FileNameMapper</code>.
*/
public void addConfigured(FileNameMapper fileNameMapper) {
add(fileNameMapper);
}
/**
* Add a <code>FileNameMapper</code>.
* @param fileNameMapper a <code>FileNameMapper</code>.
* @throws IllegalArgumentException if attempting to add this
* <code>ContainerMapper</code> to itself, or if the specified
* <code>FileNameMapper</code> is itself a <code>ContainerMapper</code>
* that contains this <code>ContainerMapper</code>.
*/
public synchronized void add(FileNameMapper fileNameMapper) {
if (this == fileNameMapper
|| (fileNameMapper instanceof ContainerMapper
&& ((ContainerMapper) fileNameMapper).contains(this))) {
throw new IllegalArgumentException(
"Circular mapper containment condition detected");
} else {
mappers.add(fileNameMapper);
}
}
/**
* Return <code>true</code> if this <code>ContainerMapper</code> or any of
* its sub-elements contains the specified <code>FileNameMapper</code>.
* @param fileNameMapper the <code>FileNameMapper</code> to search for.
* @return <code>boolean</code>.
*/
protected synchronized boolean contains(FileNameMapper fileNameMapper) {
boolean foundit = false;
for (Iterator iter = mappers.iterator(); iter.hasNext() && !foundit;) {
FileNameMapper next = (FileNameMapper) (iter.next());
foundit = (next == fileNameMapper
|| (next instanceof ContainerMapper
&& ((ContainerMapper) next).contains(fileNameMapper)));
}
return foundit;
}
/**
* Get the <code>List</code> of <code>FileNameMapper</code>s.
* @return <code>List</code>.
*/
public synchronized List getMappers() {
return Collections.unmodifiableList(mappers);
}
/**
* Empty implementation.
* @param ignore ignored.
*/
public void setFrom(String ignore) {
//Empty
}
/**
* Empty implementation.
* @param ignore ignored.
*/
public void setTo(String ignore) {
//Empty
}
}
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