    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    }