/*
* Copyright 2002-2006 the original author or authors.
*
* 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.springframework.aop;
import java.io.Serializable;
/**
* Canonical ClassFilter instance that matches all classes.
*
* @author Rod Johnson
*/
class TrueClassFilter implements ClassFilter, Serializable {
public static final TrueClassFilter INSTANCE = new TrueClassFilter();
/**
* Enforce Singleton pattern.
*/
private TrueClassFilter() {
}
public boolean matches(Class clazz) {
return true;
}
/**
* Required to support serialization. Replaces with canonical
* instance on deserialization, protecting Singleton pattern.
* Alternative to overriding <code>equals()</code>.
*/
private Object readResolve() {
return INSTANCE;
}
@Override
public String toString() {
return "ClassFilter.TRUE";
}
}
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