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001    /*
002     * Copyright (C) 2007 The Guava Authors
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package com.google.common.base;
018    
019    /**
020     * Implemented by references that have code to run after garbage collection of their referents.
021     *
022     * @see FinalizableReferenceQueue
023     * @author Bob Lee
024     * @since 2.0 (imported from Google Collections Library)
025     */
026    public interface FinalizableReference {
027      /**
028       * Invoked on a background thread after the referent has been garbage collected unless security
029       * restrictions prevented starting a background thread, in which case this method is invoked when
030       * new references are created.
031       */
032      void finalizeReferent();
033    }