/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* 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 org.jnode.fs.iso9660;
import java.io.PrintStream;
import java.io.UnsupportedEncodingException;
import org.jnode.bootlog.BootLogInstance;
/**
* @author Ewout Prangsma (epr@users.sourceforge.net)
*/
public class SupplementaryVolumeDescriptor extends VolumeDescriptor {
private final int flags;
private final String encoding;
private final boolean encodingKnown;
private final String systemIdentifier;
private final String volumeIdentifier;
private final long spaceSize;
private final String escapeSequences;
private final EntryRecord rootDirectoryEntry;
/**
* @param volume
* @param buffer
*/
public SupplementaryVolumeDescriptor(ISO9660Volume volume, byte[] buffer)
throws UnsupportedEncodingException {
super(volume, buffer);
this.flags = getUInt8(buffer, 8);
this.escapeSequences = getDChars(buffer, 89, 121 - 89);
String encoding;
boolean encodingKnown;
try {
encoding = getEncoding(escapeSequences);
encodingKnown = true;
} catch (UnsupportedEncodingException ex) {
encoding = DEFAULT_ENCODING;
encodingKnown = false;
BootLogInstance.get().warn("Unsupported encoding, escapeSequences: '" + escapeSequences + "'");
}
this.encoding = encoding;
this.encodingKnown = encodingKnown;
this.systemIdentifier = getAChars(buffer, 9, 41 - 9, encoding);
this.volumeIdentifier = getDChars(buffer, 41, 73 - 41, encoding);
this.spaceSize = getUInt32Both(buffer, 81);
this.rootDirectoryEntry = new EntryRecord(volume, buffer, 157, encoding);
}
public void dump(PrintStream out) {
out.println("Supplementary Volume Descriptor");
out.println("\tFlags " + flags);
// out.println("\tEscape sequences " + escapeSequences);
// out.println("\tEncoding " + encoding);
out.println("\tSystemIdentifier " + systemIdentifier);
out.println("\tVolumeIdentifier " + volumeIdentifier);
out.println("\tVolume Space Size " + spaceSize);
}
/**
* @return Returns the escapeSequences.
*/
public final String getEscapeSequences() {
return this.escapeSequences;
}
/**
* @return Returns the flags.
*/
public final int getFlags() {
return this.flags;
}
/**
* @return Returns the spaceSize.
*/
public final long getSpaceSize() {
return this.spaceSize;
}
/**
* @return Returns the systemIdentifier.
*/
public final String getSystemIdentifier() {
return this.systemIdentifier;
}
/**
* @return Returns the volumeIdentifier.
*/
public final String getVolumeIdentifier() {
return this.volumeIdentifier;
}
/**
* Gets a derived encoding name from the given escape sequences.
*
* @param escapeSequences
* @return the encoding name
*/
private String getEncoding(String escapeSequences) throws UnsupportedEncodingException {
if (escapeSequences.equals("%/@")) {
// UCS-2 level 1
return "UTF-16BE";
} else if (escapeSequences.equals("%/C")) {
// UCS-2 level 2
return "UTF-16BE";
} else if (escapeSequences.equals("%/E")) {
// UCS-2 level 3
return "UTF-16BE";
} else {
// Unknown
throw new UnsupportedEncodingException(escapeSequences);
}
}
/**
* Is the used encoding known to this system.
*
* @return {@code true} if the encoding known, otherwise {@code false}.
*/
public final boolean isEncodingKnown() {
return encodingKnown;
}
/**
* @return Returns the encoding.
*/
public final String getEncoding() {
return this.encoding;
}
/**
* @return Returns the rootDirectoryEntry.
*/
public final EntryRecord getRootDirectoryEntry() {
return this.rootDirectoryEntry;
}
}