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/*
* EmptyMatcher.java May 2007
*
* Copyright (C) 2007, Niall Gallagher
*
* 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.simpleframework.xml.core;
import org.simpleframework.xml.transform.Matcher;
import org.simpleframework.xml.transform.Transform;
/**
* The EmptyMatcher
object is used as a delegate type
* that is used when no user specific matcher is specified. This
* ensures that no transform is resolved for a specified type, and
* allows the normal resolution of the stock transforms.
*
* @author Niall Gallagher
*
* @see org.simpleframework.xml.transform.Transformer
*/
class EmptyMatcher implements Matcher {
/**
* This method is used to return a null value for the transform.
* Returning a null value allows the normal resolution of the
* stock transforms to be used when no matcher is specified.
*
* @param type this is the type that is expecting a transform
*
* @return this transform will always return a null value
*/
public Transform match(Class type) throws Exception {
return null;
}
}