/*
* $Id$
*
* 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.ntfs;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import org.jnode.driver.Device;
import org.jnode.fs.FSDirectory;
import org.jnode.fs.FSEntry;
import org.jnode.fs.FSFile;
import org.jnode.fs.FileSystemException;
import org.jnode.fs.ntfs.attribute.NTFSAttribute;
import org.jnode.fs.ntfs.attribute.NTFSResidentAttribute;
import org.jnode.fs.spi.AbstractFileSystem;
/**
* NTFS filesystem implementation.
*
* @author Chira
* @author Ewout Prangsma (epr@users.sourceforge.net)
*/
public class NTFSFileSystem extends AbstractFileSystem<FSEntry> {
private final NTFSVolume volume;
private FSEntry root;
/**
* @see org.jnode.fs.FileSystem#getDevice()
*/
public NTFSFileSystem(Device device, boolean readOnly, NTFSFileSystemType type) throws FileSystemException {
super(device, readOnly, type);
try {
// initialize the NTFE volume
volume = new NTFSVolume(getApi());
} catch (IOException e) {
throw new FileSystemException(e);
}
}
/**
* @see org.jnode.fs.FileSystem#getRootEntry()
*/
public FSEntry getRootEntry() throws IOException {
if (root == null) {
root = new NTFSDirectory(this, volume.getRootDirectory()).getEntry(".");
}
return root;
}
/**
* @return Returns the volume.
*/
public NTFSVolume getNTFSVolume() {
return this.volume;
}
@Override
public String getVolumeName() throws IOException {
NTFSEntry entry = (NTFSEntry) getRootEntry().getDirectory().getEntry("$Volume");
if (entry == null) {
return "";
}
NTFSAttribute attribute = entry.getFileRecord().findAttributeByType(NTFSAttribute.Types.VOLUME_NAME);
if (attribute instanceof NTFSResidentAttribute) {
NTFSResidentAttribute residentAttribute = (NTFSResidentAttribute) attribute;
byte[] nameBuffer = new byte[residentAttribute.getAttributeLength()];
residentAttribute.getData(residentAttribute.getAttributeOffset(), nameBuffer, 0, nameBuffer.length);
try {
// XXX: For Java 6, should use the version that accepts a Charset.
return new String(nameBuffer, "UTF-16LE");
} catch (UnsupportedEncodingException e) {
throw new IllegalStateException("UTF-16LE charset missing from JRE", e);
}
}
return "";
}
/**
* Flush all data.
*/
public void flush() throws IOException {
// TODO Auto-generated method stub
}
/**
*
*/
protected FSFile createFile(FSEntry entry) throws IOException {
// TODO Auto-generated method stub
return null;
}
/**
*
*/
protected FSDirectory createDirectory(FSEntry entry) throws IOException {
// TODO Auto-generated method stub
return null;
}
/**
*
*/
protected NTFSEntry createRootEntry() throws IOException {
// TODO Auto-generated method stub
return null;
}
public long getFreeSpace() throws IOException {
FileRecord bitmapRecord = volume.getMFT().getRecord(MasterFileTable.SystemFiles.BITMAP);
int bitmapSize = (int) bitmapRecord.getAttributeTotalSize(NTFSAttribute.Types.DATA, null);
byte[] buffer = new byte[bitmapSize];
bitmapRecord.readData(0, buffer, 0, buffer.length);
int usedBlocks = 0;
for (byte b : buffer) {
for (int i = 0; i < 8; i++) {
if ((b & 0x1) != 0) {
usedBlocks++;
}
b >>= 1;
}
}
long usedSpace = (long) usedBlocks * volume.getClusterSize();
return getTotalSpace() - usedSpace;
}
public long getTotalSpace() throws IOException {
FileRecord bitmapRecord = volume.getMFT().getRecord(MasterFileTable.SystemFiles.BITMAP);
long bitmapSize = bitmapRecord.getFileNameAttribute().getRealSize();
return bitmapSize * 8 * volume.getClusterSize();
}
public long getUsableSpace() {
// TODO implement me
return -1;
}
}