/*
* Copyright (c) 2010. Stephen Connolly.
* Copyright (C) 2007. Jens Hatlak <hatlak@rbg.informatik.tu-darmstadt.de>
*
* 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.rockridge.impl;
import java.util.Stack;
import com.github.stephenc.javaisotools.sabre.ContentHandler;
import com.github.stephenc.javaisotools.sabre.DataReference;
import com.github.stephenc.javaisotools.sabre.Element;
import com.github.stephenc.javaisotools.sabre.Fixup;
import com.github.stephenc.javaisotools.sabre.HandlerException;
import com.github.stephenc.javaisotools.sabre.impl.ByteDataReference;
import com.github.stephenc.javaisotools.sabre.impl.ChainingStreamHandler;
import com.github.stephenc.javaisotools.sabre.StructureHandler;
import com.github.stephenc.javaisotools.sabre.impl.ByteArrayDataReference;
public class SystemUseEntryHandler extends ChainingStreamHandler {
private Stack elements;
private int length = 0;
private Fixup lengthFixup;
public SystemUseEntryHandler(StructureHandler chainingStructureHandler, ContentHandler chainingContentHandler) {
super(chainingStructureHandler, chainingContentHandler);
this.elements = new Stack();
}
public void startElement(Element element) throws HandlerException {
elements.push(element);
if (element instanceof SystemUseEntryElement) {
SystemUseEntryElement sue = (SystemUseEntryElement) element;
// Reset byte counter
length = 0;
// Signature Word
data(new ByteArrayDataReference(sue.getSignatureWord()));
// Length (including Signature Word, Length, Version and Data)
lengthFixup = fixup(new ByteDataReference(0));
// Version
data(new ByteDataReference(sue.getVersion()));
}
super.startElement(element);
}
public void data(DataReference reference) throws HandlerException {
length += reference.getLength();
super.data(reference);
}
public Fixup fixup(DataReference reference) throws HandlerException {
length += reference.getLength();
return super.fixup(reference);
}
public void endElement() throws HandlerException {
Element element = (Element) elements.pop();
if (element instanceof SystemUseEntryElement) {
// Write and close Entry Length Fixup
if (length > 255) {
throw new RuntimeException("Invalid System Use Entry length: " + length);
}
lengthFixup.data(new ByteDataReference(length));
lengthFixup.close();
}
super.endElement();
}
}