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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.arj;

import java.util.Arrays;

class LocalFileHeader {
    int archiverVersionNumber;
    int minVersionToExtract;
    int hostOS;
    int arjFlags;
    int method;
    int fileType;
    int reserved;
    int dateTimeModified;
    long compressedSize;
    long originalSize;
    long originalCrc32;
    int fileSpecPosition;
    int fileAccessMode;
    int firstChapter;
    int lastChapter;
    
    int extendedFilePosition;
    int dateTimeAccessed;
    int dateTimeCreated;
    int originalSizeEvenForVolumes;
    
    String name;
    String comment;
    
    byte[][] extendedHeaders = null;
    
    static class Flags {
        static final int GARBLED = 0x01;
        static final int VOLUME = 0x04;
        static final int EXTFILE = 0x08;
        static final int PATHSYM = 0x10;
        static final int BACKUP = 0x20;
    }
    
    static class FileTypes {
        static final int BINARY = 0;
        static final int SEVEN_BIT_TEXT = 1;
        static final int DIRECTORY = 3;
        static final int VOLUME_LABEL = 4;
        static final int CHAPTER_LABEL = 5;
    }
    
    static class Methods {
        static final int STORED = 0;
        static final int COMPRESSED_MOST = 1;
        static final int COMPRESSED_FASTEST = 4;
        static final int NO_DATA_NO_CRC = 8;
        static final int NO_DATA = 9;
    }

    @Override
    public String toString() {
        StringBuilder builder = new StringBuilder();
        builder.append("LocalFileHeader [archiverVersionNumber=");
        builder.append(archiverVersionNumber);
        builder.append(", minVersionToExtract=");
        builder.append(minVersionToExtract);
        builder.append(", hostOS=");
        builder.append(hostOS);
        builder.append(", arjFlags=");
        builder.append(arjFlags);
        builder.append(", method=");
        builder.append(method);
        builder.append(", fileType=");
        builder.append(fileType);
        builder.append(", reserved=");
        builder.append(reserved);
        builder.append(", dateTimeModified=");
        builder.append(dateTimeModified);
        builder.append(", compressedSize=");
        builder.append(compressedSize);
        builder.append(", originalSize=");
        builder.append(originalSize);
        builder.append(", originalCrc32=");
        builder.append(originalCrc32);
        builder.append(", fileSpecPosition=");
        builder.append(fileSpecPosition);
        builder.append(", fileAccessMode=");
        builder.append(fileAccessMode);
        builder.append(", firstChapter=");
        builder.append(firstChapter);
        builder.append(", lastChapter=");
        builder.append(lastChapter);
        builder.append(", extendedFilePosition=");
        builder.append(extendedFilePosition);
        builder.append(", dateTimeAccessed=");
        builder.append(dateTimeAccessed);
        builder.append(", dateTimeCreated=");
        builder.append(dateTimeCreated);
        builder.append(", originalSizeEvenForVolumes=");
        builder.append(originalSizeEvenForVolumes);
        builder.append(", name=");
        builder.append(name);
        builder.append(", comment=");
        builder.append(comment);
        builder.append(", extendedHeaders=");
        builder.append(Arrays.toString(extendedHeaders));
        builder.append("]");
        return builder.toString();
    }
}