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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.commons.compress.parallel;

import java.io.InputStream;

/**
 * Supplies input streams.
 *
 * Implementations are required to support thread-handover. While an instance will
 * not be accessed concurrently by multiple threads, it will be called by
 * a different thread than it was created on.
 *
 * @since 1.10
 */
public interface InputStreamSupplier {

    /**
     * Supply an input stream for a resource.
     * @return the input stream. Should never null, but may be an empty stream.
     */
    InputStream get();
}