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Diffstat (limited to 'guava/src/com/google/common/base/FinalizableSoftReference.java')
-rw-r--r-- | guava/src/com/google/common/base/FinalizableSoftReference.java | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/guava/src/com/google/common/base/FinalizableSoftReference.java b/guava/src/com/google/common/base/FinalizableSoftReference.java new file mode 100644 index 0000000..88607f4 --- /dev/null +++ b/guava/src/com/google/common/base/FinalizableSoftReference.java @@ -0,0 +1,42 @@ +/* + * 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 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 (imported from Google Collections Library) + */ +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(); + } +} |