com.github.stephenc.javaisotools.joliet.impl.JolietHandler Maven / Gradle / Ivy

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/*
 * Copyright (c) 2010. Stephen Connolly.
 * Copyright (C) 2007. Jens Hatlak 
 *
 * 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.joliet.impl;

import java.util.HashMap;

import com.github.stephenc.javaisotools.iso9660.ISO9660RootDirectory;
import com.github.stephenc.javaisotools.iso9660.StandardHandler;
import com.github.stephenc.javaisotools.iso9660.impl.FileElement;
import com.github.stephenc.javaisotools.iso9660.volumedescriptors.SupplementaryVolumeDescriptor;
import com.github.stephenc.javaisotools.sabre.Element;
import com.github.stephenc.javaisotools.sabre.Fixup;
import com.github.stephenc.javaisotools.sabre.StreamHandler;
import com.github.stephenc.javaisotools.sabre.impl.ByteDataReference;
import com.github.stephenc.javaisotools.iso9660.LayoutHelper;
import com.github.stephenc.javaisotools.iso9660.impl.ISO9660Constants;
import com.github.stephenc.javaisotools.iso9660.impl.ISO9660Element;
import com.github.stephenc.javaisotools.iso9660.impl.ISO9660Factory;
import com.github.stephenc.javaisotools.iso9660.impl.LogicalSectorElement;
import com.github.stephenc.javaisotools.iso9660.sabre.impl.BothWordDataReference;
import com.github.stephenc.javaisotools.sabre.HandlerException;

public class JolietHandler extends StandardHandler {

    private JolietConfig config;
    private LayoutHelper helper;
    private HashMap volumeFixups;
    private ISO9660Factory factory;

    public JolietHandler(StreamHandler streamHandler, ISO9660RootDirectory root, JolietConfig config)
            throws HandlerException {
        super(streamHandler, root, config);
        this.config = config;
        this.volumeFixups = new HashMap();

        checkMetadataFiles();

        // Use a copy of the original root for Joliet
        ISO9660RootDirectory jolietRoot = (ISO9660RootDirectory) root.clone();
        this.helper = new JolietLayoutHelper(this, jolietRoot, config.getMaxCharsInFilename(), config.getFailOnTruncation());
        this.factory = new ISO9660Factory(this, config, helper, jolietRoot, volumeFixups);

        factory.applyNamingConventions();
    }

    public void startElement(Element element) throws HandlerException {
        if (element instanceof ISO9660Element) {
            String id = (String) element.getId();
            process(id);
        } else if (element instanceof FileElement) {
            FileElement fileElement = (FileElement) element;
            factory.doFileFixup(fileElement.getFile());
        }
        super.startElement(element);
    }

    private void process(String id) throws HandlerException {
        if (id.equals("VDS")) {
            doSVD();
        } else if (id.equals("PTA")) {
            factory.doPT(ISO9660Constants.TYPE_L_PT);
            factory.doPT(ISO9660Constants.TYPE_M_PT);
        } else if (id.equals("DRA")) {
            factory.doDRA();
        }
    }

    private void doSVD() throws HandlerException {
        super.startElement(new LogicalSectorElement("SVD"));

        SupplementaryVolumeDescriptor svd = new SupplementaryVolumeDescriptor(this, helper);
        svd.setMetadata(config);
        volumeFixups.putAll(svd.doSVD());

        // Set Volume Flags to 0 (Unused Field)
        Fixup volumeFlags = (Fixup) volumeFixups.get("volumeFlagsFixup");
        volumeFlags.data(new ByteDataReference(0));
        volumeFlags.close();
        volumeFixups.remove("volumeFlagsFixup");

        // Set Escape Sequences for UCS-2 level
        Fixup escapeSequences = (Fixup) volumeFixups.get("escapeSequencesFixup");
        escapeSequences.data(config.getUCS2LevelEscapeSequence());
        escapeSequences.close();
        volumeFixups.remove("escapeSequencesFixup");

        super.endElement();
    }

    public void endDocument() throws HandlerException {
        // Write and close Volume Space Size Fixup
        Fixup volumeSpaceSizeFixup = (Fixup) volumeFixups.get("volumeSpaceSizeFixup");
        volumeSpaceSizeFixup.data(new BothWordDataReference(helper.getCurrentLocation()));
        volumeSpaceSizeFixup.close();
        volumeFixups.remove("volumeSpaceSizeFixup");

        super.endDocument();
    }
}