    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one
    003 * or more contributor license agreements.  See the NOTICE file
    004 * distributed with this work for additional information
    005 * regarding copyright ownership.  The ASF licenses this file
    006 * to you under the Apache License, Version 2.0 (the
    007 * "License"); you may not use this file except in compliance
    008 * with the License.  You may obtain a copy of the License at
    009 *
    010 * http://www.apache.org/licenses/LICENSE-2.0
    011 *
    012 * Unless required by applicable law or agreed to in writing,
    013 * software distributed under the License is distributed on an
    014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    015 * KIND, either express or implied.  See the License for the
    016 * specific language governing permissions and limitations
    017 * under the License.
    018 */
    019package org.apache.commons.compress.archivers.examples;
    020
    021import java.io.Closeable;
    022import java.io.IOException;
    023
    024/**
    025 * Callback that is informed about a closable resource that has been
    026 * wrapped around a passed in stream or channel by Expander or
    027 * Archiver when Expander or Archiver no longer need them.
    028 *
    029 * <p>This provides a way to close said resources in the calling code.</p>
    030 *
    031 * @since 1.19
    032 */
    033public interface CloseableConsumer {
    034
    035    /**
    036     * Closes the passed in Closeable immediately.
    037     */
    038    CloseableConsumer CLOSING_CONSUMER = Closeable::close;
    039
    040    /**
    041     * Ignores the passed in Closeable.
    042     */
    043    CloseableConsumer NULL_CONSUMER = c -> { };
    044
    045    /**
    046     * Callback that is informed about a Closeable resource that has
    047     * been wrapped around a passed in stream or channel by Expander
    048     * or Archiver when Expander or Archiver no longer need them.
    049     *
    050     * @param c Closeable created by Expander or Archiver that is now
    051     * no longer used
    052     *
    053     * @throws IOException on error
    054     */
    055    void accept(Closeable c) throws IOException;
    056}