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Apache Commons Compress 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.sevenz;

/// Map between folders, files and streams.
class StreamMap {
    /// The first Archive.packStream index of each folder.
    int[] folderFirstPackStreamIndex;
    /// Offset to beginning of this pack stream's data, relative to the beginning of the first pack stream.
    long[] packStreamOffsets;
    /// Index of first file for each folder.
    int[] folderFirstFileIndex;
    /// Index of folder for each file.
    int[] fileFolderIndex;

    @Override
    public String toString() {
        return "StreamMap with indices of " + folderFirstPackStreamIndex.length
            + " folders, offsets of " + packStreamOffsets.length + " packed streams,"
            + " first files of " + folderFirstFileIndex.length + " folders and"
            + " folder indices for " + fileFolderIndex.length + " files";
    }
}