| /* |
| * 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.google.common.base; |
| |
| import com.google.common.annotations.GwtIncompatible; |
| import java.lang.ref.ReferenceQueue; |
| import java.lang.ref.SoftReference; |
| |
| /** |
| * Soft 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}. |
| * |
| * @author Bob Lee |
| * @since 2.0 |
| */ |
| @GwtIncompatible |
| public abstract class FinalizableSoftReference<T> extends SoftReference<T> |
| implements FinalizableReference { |
| /** |
| * Constructs a new finalizable soft reference. |
| * |
| * @param referent to softly reference |
| * @param queue that should finalize the referent |
| */ |
| protected FinalizableSoftReference(T referent, FinalizableReferenceQueue queue) { |
| super(referent, queue.queue); |
| queue.cleanUp(); |
| } |
| } |