/*
* $Id$
*
* Copyright (C) 2003-2015 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.index;
import org.jnode.fs.ntfs.FileRecord;
import org.jnode.fs.ntfs.NTFSStructure;
/**
* Structure accessor of an Index Entry.
*
* @author vali
* @author Ewout Prangsma (epr@users.sourceforge.net)
*/
public final class IndexEntry extends NTFSStructure {
/**
* The offset to the index entry content.
*/
public static final int CONTENT_OFFSET = 0x10;
private final FileRecord parentFileRecord;
/**
* Initialize this instance.
* @param parentFileRecord
* @param buffer
* @param offset
*/
public IndexEntry(FileRecord parentFileRecord, byte[] buffer, int offset) {
super(buffer, offset);
this.parentFileRecord = parentFileRecord;
}
/**
* Initialize this instance.
* @param parentFileRecord
* @param parent
* @param offset
*/
public IndexEntry(FileRecord parentFileRecord, NTFSStructure parent, int offset) {
super(parent, offset);
this.parentFileRecord = parentFileRecord;
}
public boolean hasSubNodes() {
return (getIndexFlags() & 0x01) != 0;
}
/**
* Gets the length of this index entry in bytes.
* @return
*/
public int getSize() {
return getUInt16(0x08);
}
/**
* Gets the content length of this index entry in bytes.
* @return
*/
public int getContentSize() {
return getUInt16(0x0A);
}
/**
* Gets the flags of this index entry.
* @return
*/
public int getIndexFlags() {
return getUInt8(0x0C);
}
public boolean isLastIndexEntryInSubnode() {
return (getIndexFlags() & 0x02) != 0;
}
public long getFileReferenceNumber() {
return getUInt48(0x00);
}
/**
* @return Returns the parentFileRecord.
*/
public FileRecord getParentFileRecord() {
return parentFileRecord;
}
public long getSubnodeVCN() {
return getInt64(getSize() - 8); // TODO: getUInt64AsInt
//return getUInt32(getSize() - 8);
}
@Override
public String toString() {
return String.format("index-entry:[flags: %d size:%d content-size:%d]", getIndexFlags(), getSize(),
getContentSize());
}
}