46 lines
1.5 KiB
Java
46 lines
1.5 KiB
Java
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/*
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* Copyright (C) 2007 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.base;
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import java.lang.ref.PhantomReference;
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import java.lang.ref.ReferenceQueue;
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/**
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* Phantom reference with a {@code finalizeReferent()} method which a background
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* thread invokes after the garbage collector reclaims the referent. This is a
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* simpler alternative to using a {@link ReferenceQueue}.
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*
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* <p>
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* Unlike a normal phantom reference, this reference will be cleared
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* automatically.
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*
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* @author Bob Lee
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* @since 2.0 (imported from Google Collections Library)
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*/
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public abstract class FinalizablePhantomReference<T> extends PhantomReference<T> implements FinalizableReference {
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/**
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* Constructs a new finalizable phantom reference.
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*
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* @param referent to phantom reference
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* @param queue that should finalize the referent
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*/
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protected FinalizablePhantomReference(T referent, FinalizableReferenceQueue queue) {
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super(referent, queue.queue);
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queue.cleanUp();
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}
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}
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