com.github.stephenc.javaisotools.iso9660.impl.ISO9660Handler Maven / Gradle / Ivy

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/*
 * Copyright (c) 2013. Brad BARCLAY 
 * 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.iso9660.impl;

import java.util.HashMap;
import java.util.Stack;

import com.github.stephenc.javaisotools.iso9660.ISO9660RootDirectory;
import com.github.stephenc.javaisotools.iso9660.LayoutHelper;
import com.github.stephenc.javaisotools.iso9660.StandardHandler;
import com.github.stephenc.javaisotools.iso9660.volumedescriptors.PrimaryVolumeDescriptor;
import com.github.stephenc.javaisotools.iso9660.volumedescriptors.VolumeDescriptorSetTerminator;
import com.github.stephenc.javaisotools.sabre.Element;
import com.github.stephenc.javaisotools.sabre.HandlerException;
import com.github.stephenc.javaisotools.sabre.StreamHandler;
import com.github.stephenc.javaisotools.rockridge.impl.RockRidgeConfig;
import com.github.stephenc.javaisotools.iso9660.sabre.impl.BothWordDataReference;
import com.github.stephenc.javaisotools.sabre.Fixup;

public class ISO9660Handler extends StandardHandler {

    private Stack elements;
    private ISO9660Config config;
    private LayoutHelper helper;
    private HashMap volumeFixups;
    private ISO9660Factory factory;

    public ISO9660Handler(StreamHandler streamHandler, ISO9660RootDirectory root, ISO9660Config config,
                          RockRidgeConfig rrConfig) throws HandlerException {
        super(streamHandler, root, config);
        this.elements = new Stack();
        this.config = config;
        this.volumeFixups = new HashMap();

        checkMetadataFiles();

        // Use a copy of the original root for ISO 9660
        ISO9660RootDirectory isoRoot = (ISO9660RootDirectory) root.clone();
        this.helper = new ISO9660LayoutHelper(this, isoRoot);

        if (rrConfig != null) {
            this.factory = new ISO9660RockRidgeFactory(this, config, helper, root, isoRoot, volumeFixups, rrConfig.getPatternToModeMap());
        } else {
            this.factory = new ISO9660Factory(this, config, helper, isoRoot, volumeFixups);
        }

        if (config.dirDepthRestrictedTo8()) {
            factory.relocateDirectories();
        }

        factory.applyNamingConventions();
    }

    public void startElement(Element element) throws HandlerException {
        elements.push(element);
        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")) {
            doPVD();
        } 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 doPVD() throws HandlerException {
        super.startElement(new LogicalSectorElement("PVD"));

        PrimaryVolumeDescriptor pvd = new PrimaryVolumeDescriptor(this, helper);
        pvd.setMetadata(config);
        volumeFixups.putAll(pvd.doPVD());

        super.endElement();
    }

    public void endElement() throws HandlerException {
        Element element = (Element) elements.pop();
        if (element instanceof ISO9660Element) {
            String id = (String) element.getId();
            if (id.equals("VDS")) {
                // Add VDST
                doVDST();
            }
        }
        super.endElement();
    }

    private void doVDST() throws HandlerException {
        super.startElement(new LogicalSectorElement("VDST"));
        VolumeDescriptorSetTerminator vdst = new VolumeDescriptorSetTerminator(this, helper);
        vdst.doVDST();
        super.endElement();
    }

    public void endDocument() throws HandlerException {
        // Write and close Empty File Fixups
        factory.doEmptyFileFixups();

        // 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();
    }
}