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/*
* Copyright (C) 2007 The Guava 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.glassfish.jersey.internal.guava;
import java.util.Set;
/**
* A set which forwards all its method calls to another set. Subclasses should
* override one or more methods to modify the behavior of the backing set as
* desired per the decorator pattern.
*
*
Warning: The methods of {@code ForwardingSet} forward
* indiscriminately to the methods of the delegate. For example,
* overriding {@link #add} alone will not change the behavior of {@link
* #addAll}, which can lead to unexpected behavior. In this case, you should
* override {@code addAll} as well, either providing your own implementation, or
* delegating to the provided {@code standardAddAll} method.
*
*
The {@code standard} methods are not guaranteed to be thread-safe, even
* when all of the methods that they depend on are thread-safe.
*
* @author Kevin Bourrillion
* @author Louis Wasserman
* @since 2.0 (imported from Google Collections Library)
*/
public abstract class ForwardingSet extends ForwardingCollection
implements Set {
// TODO(user): identify places where thread safety is actually lost
/**
* Constructor for use by subclasses.
*/
ForwardingSet() {
}
@Override
protected abstract Set delegate();
@Override
public boolean equals(Object object) {
return object == this || delegate().equals(object);
}
@Override
public int hashCode() {
return delegate().hashCode();
}
}