// GenericsNote: Converted.
/*
* Copyright 2001-2004 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.commons.collections15.functors;
import org.apache.commons.collections15.Transformer;
/**
* Transformer implementation that does nothing.
*
* @author Matt Hall, John Watkinson, Stephen Colebourne
* @version $Revision: 1.1 $ $Date: 2005/10/11 17:05:24 $
* @since Commons Collections 3.0
*/
public class NOPTransformer<I> implements Transformer<I, I> {
/**
* Serial version UID
*/
static final long serialVersionUID = 2133891748318574490L;
/**
* Singleton predicate instance
*/
public static final Transformer INSTANCE = new NOPTransformer();
/**
* Factory returning the singleton instance.
*
* @return the singleton instance
* @since Commons Collections 3.1
*/
public static <T> Transformer<T, T> getInstance() {
return INSTANCE;
}
/**
* Constructor
*/
private NOPTransformer() {
super();
}
/**
* Transforms the input to result by doing nothing.
*
* @param input
* the input object to transform
* @return the transformed result which is the input
*/
@Override
public I transform(I input) {
return input;
}
}