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Apache Commons Compress software defines an API for working with compression and archive formats. These include: bzip2, gzip, pack200, lzma, xz, Snappy, traditional Unix Compress, DEFLATE, DEFLATE64, LZ4, Brotli, Zstandard and ar, cpio, jar, tar, zip, dump, 7z, arj.

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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.archivers;

/**
 * Provides information about ArchiveEntry stream offsets.
 */
public interface EntryStreamOffsets {

    /**
     * Indicates that the offset is unknown.
     */
    long OFFSET_UNKNOWN = -1;

    /**
     * Gets the offset of data stream within the archive file,
     *
     * @return the offset of entry data stream, {@code OFFSET_UNKNOWN} if not known.
     */
    long getDataOffset();

    /**
     * Tests whether the stream is contiguous, that is, not split among several archive parts, interspersed with control blocks, and so on.
     *
     * @return true if stream is contiguous, false otherwise.
     */
    boolean isStreamContiguous();
}