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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 com.facebook.presto.jdbc.internal.guava.base;

import com.facebook.presto.jdbc.internal.guava.annotations.GwtIncompatible;
import java.lang.ref.PhantomReference;
import java.lang.ref.ReferenceQueue;

/**
 * Phantom reference with a {@code finalizeReferent()} method which a background thread invokes
 * after the garbage collector reclaims the referent. This is a simpler alternative to using a
 * {@link ReferenceQueue}.
 *
 * 

Unlike a normal phantom reference, this reference will be cleared automatically. * * @author Bob Lee * @since 2.0 */ @GwtIncompatible public abstract class FinalizablePhantomReference extends PhantomReference implements FinalizableReference { /** * Constructs a new finalizable phantom reference. * * @param referent to phantom reference * @param queue that should finalize the referent */ protected FinalizablePhantomReference(T referent, FinalizableReferenceQueue queue) { super(referent, queue.queue); queue.cleanUp(); } }





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