• Home
• com.github.stephenc.java-iso-tools
• sabre
• 2.1.0
• source code
• FileSetDescriptor.java

×

Project download

Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $

You can buy this project and download/modify it how often you want.

com.github.stephenc.javaisotools.udflib.structures.FileSetDescriptor Maven / Gradle / Ivy

/*
 * Copyright (c) 2010. Stephen Connolly.
 * Copyright (c) 2006. Björn Stickler .
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

package com.github.stephenc.javaisotools.udflib.structures;

import java.io.IOException;
import java.io.RandomAccessFile;

import com.github.stephenc.javaisotools.udflib.tools.Checksum;
import com.github.stephenc.javaisotools.udflib.tools.OSTAUnicode;
import com.github.stephenc.javaisotools.udflib.tools.BinaryTools;

public class FileSetDescriptor {

    public Tag DescriptorTag;                            // struct tag
    public Timestamp RecordingDateandTime;                    // struct timestamp
    public int InterchangeLevel;                        // Uint16
    public int MaximumInterchangeLevel;                // Uint16
    public long CharacterSetList;                        // Uint32
    public long MaximumCharacterSetList;                // Uint32
    public long FileSetNumber;                            // Uint32
    public long FileSetDescriptorNumber;                // Uint32
    public CharSpec LogicalVolumeIdentifierCharacterSet;    // struct charspec
    public byte LogicalVolumeIdentifier[];                // dstring[128]
    public CharSpec FileSetCharacterSet;                    // struct charspec
    public byte FileSetIdentifier[];                    // dstring[32]
    public byte CopyrightFileIdentifier[];                // dstring[32]
    public byte AbstractFileIdentifier[];                // dstring[32]
    public Long_ad RootDirectoryICB;                        // struct long_ad
    public EntityID DomainIdentifier;                        // struct EntityID
    public Long_ad NextExtent;                                // struct long_ad
    public byte Reserved[];                                // byte[48]

    public FileSetDescriptor() {
        DescriptorTag = new Tag();
        DescriptorTag.TagIdentifier = 256;

        RecordingDateandTime = new Timestamp();
        LogicalVolumeIdentifierCharacterSet = new CharSpec();
        LogicalVolumeIdentifier = new byte[128];
        FileSetCharacterSet = new CharSpec();
        FileSetIdentifier = new byte[32];
        CopyrightFileIdentifier = new byte[32];
        AbstractFileIdentifier = new byte[32];
        RootDirectoryICB = new Long_ad();
        DomainIdentifier = new EntityID();
        NextExtent = new Long_ad();
        Reserved = new byte[48];
    }

    public void setLogicalVolumeIdentifier(String logicalVolumeIdentifier) {
        LogicalVolumeIdentifier = new byte[128];

        try {
            byte logicalVolumeIdentifierBytes[] = logicalVolumeIdentifier.getBytes("UTF-16");

            int compId = OSTAUnicode.getBestCompressionId(logicalVolumeIdentifierBytes);

            byte tmpIdentifier[] = OSTAUnicode.CompressUnicodeByte(logicalVolumeIdentifierBytes, compId);

            int length = (tmpIdentifier.length < 127) ? tmpIdentifier.length : 127;

            System.arraycopy(tmpIdentifier, 0, LogicalVolumeIdentifier, 0, length);

            LogicalVolumeIdentifier[LogicalVolumeIdentifier.length - 1] = (byte) length;
        }
        catch (Exception ex) { /* never happens */ }
    }

    public void setFileSetIdentifier(String fileSetIdentifier) {
        FileSetIdentifier = new byte[32];

        try {
            byte fileSetIdentifierBytes[] = fileSetIdentifier.getBytes("UTF-16");

            int compId = OSTAUnicode.getBestCompressionId(fileSetIdentifierBytes);

            byte tmpIdentifier[] = OSTAUnicode.CompressUnicodeByte(fileSetIdentifierBytes, compId);

            int length = (tmpIdentifier.length < 31) ? tmpIdentifier.length : 31;

            System.arraycopy(tmpIdentifier, 0, FileSetIdentifier, 0, length);

            FileSetIdentifier[FileSetIdentifier.length - 1] = (byte) length;
        }
        catch (Exception ex) { /* never happens */ }
    }

    public void setAbstractFileIdentifier(String abstractFileIdentifier) {
        AbstractFileIdentifier = new byte[32];

        try {
            byte abstractFileIdentifierBytes[] = abstractFileIdentifier.getBytes("UTF-16");

            int compId = OSTAUnicode.getBestCompressionId(abstractFileIdentifierBytes);

            byte tmpIdentifier[] = OSTAUnicode.CompressUnicodeByte(abstractFileIdentifierBytes, compId);

            int length = (tmpIdentifier.length < 31) ? tmpIdentifier.length : 31;

            System.arraycopy(tmpIdentifier, 0, AbstractFileIdentifier, 0, length);

            AbstractFileIdentifier[AbstractFileIdentifier.length - 1] = (byte) length;
        }
        catch (Exception ex) { /* never happens */ }
    }

    public void setCopyrightFileIdentifier(String copyrightFileIdentifier) {
        CopyrightFileIdentifier = new byte[32];

        try {
            byte copyrightFileIdentifierBytes[] = copyrightFileIdentifier.getBytes("UTF-16");

            int compId = OSTAUnicode.getBestCompressionId(copyrightFileIdentifierBytes);

            byte tmpIdentifier[] = OSTAUnicode.CompressUnicodeByte(copyrightFileIdentifierBytes, compId);

            int length = (tmpIdentifier.length < 31) ? tmpIdentifier.length : 31;

            System.arraycopy(tmpIdentifier, 0, CopyrightFileIdentifier, 0, length);

            CopyrightFileIdentifier[CopyrightFileIdentifier.length - 1] = (byte) length;
        }
        catch (Exception ex) { /* never happens */ }
    }

    public void Load(RandomAccessFile myRandomAccessFile)
            throws IOException {
        DescriptorTag = new Tag();
        DescriptorTag.read(myRandomAccessFile);

        RecordingDateandTime = new Timestamp();
        RecordingDateandTime.read(myRandomAccessFile);

        InterchangeLevel = BinaryTools.readUInt16AsInt(myRandomAccessFile);
        MaximumInterchangeLevel = BinaryTools.readUInt16AsInt(myRandomAccessFile);
        CharacterSetList = BinaryTools.readUInt32AsLong(myRandomAccessFile);
        MaximumCharacterSetList = BinaryTools.readUInt32AsLong(myRandomAccessFile);
        FileSetNumber = BinaryTools.readUInt32AsLong(myRandomAccessFile);
        FileSetDescriptorNumber = BinaryTools.readUInt32AsLong(myRandomAccessFile);

        LogicalVolumeIdentifierCharacterSet = new CharSpec();
        LogicalVolumeIdentifierCharacterSet.read(myRandomAccessFile);

        LogicalVolumeIdentifier = new byte[128];
        myRandomAccessFile.read(LogicalVolumeIdentifier);

        FileSetCharacterSet = new CharSpec();
        FileSetCharacterSet.read(myRandomAccessFile);

        FileSetIdentifier = new byte[32];
        myRandomAccessFile.read(FileSetIdentifier);

        CopyrightFileIdentifier = new byte[32];
        myRandomAccessFile.read(CopyrightFileIdentifier);

        AbstractFileIdentifier = new byte[32];
        myRandomAccessFile.read(AbstractFileIdentifier);

        RootDirectoryICB = new Long_ad();
        RootDirectoryICB.read(myRandomAccessFile);

        DomainIdentifier = new EntityID();
        DomainIdentifier.read(myRandomAccessFile);

        NextExtent = new Long_ad();
        NextExtent.read(myRandomAccessFile);

        Reserved = new byte[48];
        myRandomAccessFile.read(Reserved);
    }

    public void write(RandomAccessFile myRandomAccessFile, int blockSize)
            throws IOException {
        byte rawBytes[] = getBytesWithoutDescriptorTag();

        DescriptorTag.DescriptorCRCLength = rawBytes.length;
        DescriptorTag.DescriptorCRC = Checksum.cksum(rawBytes);

        DescriptorTag.write(myRandomAccessFile);

        myRandomAccessFile.write(rawBytes);

        int bytesWritten = rawBytes.length + 16;

        byte emptyBytesInBlock[] = new byte[blockSize - bytesWritten];
        myRandomAccessFile.write(emptyBytesInBlock);
    }

    public byte[] getBytesWithoutDescriptorTag() {
        byte RecordingDateandTimeBytes[] = RecordingDateandTime.getBytes();
        byte LogicalVolumeIdentifierCharacterSetBytes[] = LogicalVolumeIdentifierCharacterSet.getBytes();
        byte FileSetCharacterSetBytes[] = FileSetCharacterSet.getBytes();
        byte RootDirectoryICBBytes[] = RootDirectoryICB.getBytes();
        byte DomainIdentifierBytes[] = DomainIdentifier.getBytes();
        byte NextExtentBytes[] = NextExtent.getBytes();

        byte rawBytes[] = new byte[292
                + RecordingDateandTimeBytes.length
                + LogicalVolumeIdentifierCharacterSetBytes.length
                + FileSetCharacterSetBytes.length
                + RootDirectoryICBBytes.length
                + DomainIdentifierBytes.length
                + NextExtentBytes.length];

        int pos = 0;

        System.arraycopy(RecordingDateandTimeBytes, 0, rawBytes, pos, RecordingDateandTimeBytes.length);
        pos += RecordingDateandTimeBytes.length;

        pos = BinaryTools.getUInt16BytesFromInt(InterchangeLevel, rawBytes, pos);
        pos = BinaryTools.getUInt16BytesFromInt(MaximumInterchangeLevel, rawBytes, pos);
        pos = BinaryTools.getUInt32BytesFromLong(CharacterSetList, rawBytes, pos);
        pos = BinaryTools.getUInt32BytesFromLong(MaximumCharacterSetList, rawBytes, pos);
        pos = BinaryTools.getUInt32BytesFromLong(FileSetNumber, rawBytes, pos);
        pos = BinaryTools.getUInt32BytesFromLong(FileSetDescriptorNumber, rawBytes, pos);

        System.arraycopy(LogicalVolumeIdentifierCharacterSetBytes, 0, rawBytes, pos,
                LogicalVolumeIdentifierCharacterSetBytes.length);
        pos += LogicalVolumeIdentifierCharacterSetBytes.length;

        System.arraycopy(LogicalVolumeIdentifier, 0, rawBytes, pos, LogicalVolumeIdentifier.length);
        pos += LogicalVolumeIdentifier.length;

        System.arraycopy(FileSetCharacterSetBytes, 0, rawBytes, pos, FileSetCharacterSetBytes.length);
        pos += FileSetCharacterSetBytes.length;

        System.arraycopy(FileSetIdentifier, 0, rawBytes, pos, FileSetIdentifier.length);
        pos += FileSetIdentifier.length;

        System.arraycopy(CopyrightFileIdentifier, 0, rawBytes, pos, CopyrightFileIdentifier.length);
        pos += CopyrightFileIdentifier.length;

        System.arraycopy(AbstractFileIdentifier, 0, rawBytes, pos, AbstractFileIdentifier.length);
        pos += AbstractFileIdentifier.length;

        System.arraycopy(RootDirectoryICBBytes, 0, rawBytes, pos, RootDirectoryICBBytes.length);
        pos += RootDirectoryICBBytes.length;

        System.arraycopy(DomainIdentifierBytes, 0, rawBytes, pos, DomainIdentifierBytes.length);
        pos += DomainIdentifierBytes.length;

        System.arraycopy(NextExtentBytes, 0, rawBytes, pos, NextExtentBytes.length);
        pos += NextExtentBytes.length;

        System.arraycopy(Reserved, 0, rawBytes, pos, Reserved.length);
        pos += Reserved.length;

        return rawBytes;
    }

    public byte[] getBytes(int blockSize) {
        byte bytesWithoutDescriptorTag[] = getBytesWithoutDescriptorTag();

        DescriptorTag.DescriptorCRCLength = bytesWithoutDescriptorTag.length;
        DescriptorTag.DescriptorCRC = Checksum.cksum(bytesWithoutDescriptorTag);

        byte descriptorTagBytes[] = DescriptorTag.getBytes();

        int paddedLength = descriptorTagBytes.length + bytesWithoutDescriptorTag.length;
        if (paddedLength % blockSize != 0) {
            paddedLength += blockSize - (paddedLength % blockSize);
        }

        byte[] rawBytes = new byte[paddedLength];

        int pos = 0;

        System.arraycopy(descriptorTagBytes, 0, rawBytes, pos, descriptorTagBytes.length);
        pos += descriptorTagBytes.length;

        System.arraycopy(bytesWithoutDescriptorTag, 0, rawBytes, pos, bytesWithoutDescriptorTag.length);
        pos += bytesWithoutDescriptorTag.length;

        return rawBytes;
    }

}