    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 */
    019
    020package org.apache.commons.compress.parallel;
    021
    022import java.io.InputStream;
    023
    024/**
    025 * Supplies input streams.
    026 *
    027 * Implementations are required to support thread-handover. While an instance will
    028 * not be accessed concurrently by multiple threads, it will be called by
    029 * a different thread than it was created on.
    030 *
    031 * @since 1.10
    032 */
    033public interface InputStreamSupplier {
    034
    035    /**
    036     * Supply an input stream for a resource.
    037     * @return the input stream. Should never null, but may be an empty stream.
    038     */
    039    InputStream get();
    040}