// 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;
import java.io.Serializable;
/**
* Transformer implementation that calls a Factory and returns the result.
*
* @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 FactoryTransformer<I, T>
implements Transformer<I, T>, Serializable {
/**
* Serial version UID
*/
static final long serialVersionUID = -6817674502475353160L;
/**
* The factory to wrap
*/
private final Factory<T> iFactory;
/**
* Factory method that performs validation.
*
* @param factory
* the factory to call, not null
* @return the <code>factory</code> transformer
* @throws IllegalArgumentException
* if the factory is null
*/
public static <K, T> Transformer<K, T> getInstance(Factory<T> factory) {
if (factory == null) {
throw new IllegalArgumentException("Factory must not be null");
}
return new FactoryTransformer<K, T>(factory);
}
/**
* Constructor that performs no validation. Use <code>getInstance</code> if
* you want that.
*
* @param factory
* the factory to call, not null
*/
public FactoryTransformer(Factory<T> factory) {
super();
iFactory = factory;
}
/**
* Gets the factory.
*
* @return the factory
* @since Commons Collections 3.1
*/
public Factory<T> getFactory() {
return iFactory;
}
/**
* Transforms the input by ignoring the input and returning the result of
* calling the decorated factory.
*
* @param input
* the input object to transform
* @return the transformed result
*/
@Override
public T transform(I input) {
return iFactory.create();
}
}