01: /**
02: * Copyright (C) 2006 Google Inc.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */package com.google.inject.util;
16:
17: import java.lang.ref.WeakReference;
18:
19: /**
20: * Weak reference with a {@link FinalizableReference#finalizeReferent()} method
21: * which a background thread invokes after the garbage collector reclaims the
22: * referent. This is a simpler alternative to using a
23: * {@link java.lang.ref.ReferenceQueue}.
24: *
25: * @author crazybob@google.com (Bob Lee)
26: */
27: public abstract class FinalizableWeakReference<T> extends
28: WeakReference<T> implements FinalizableReference {
29:
30: protected FinalizableWeakReference(T referent) {
31: super(referent, FinalizableReferenceQueue.getInstance());
32: }
33: }
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