/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-04 The eXist Team
*
* http://exist-db.org
*
* This program 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
* of the License, or (at your option) any later version.
*
* This program 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 program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id$
*/
package org.exist.storage.dom;
import java.nio.ByteBuffer;
import org.exist.storage.DBBroker;
import org.exist.storage.NativeBroker;
import org.exist.storage.journal.AbstractLoggable;
import org.exist.storage.journal.LogException;
import org.exist.storage.txn.Txn;
public class AddValueLoggable extends AbstractLoggable {
protected DOMFile domDb;
protected long pageNum;
protected short tid;
protected byte[] value;
public AddValueLoggable() {
super(DOMFile.LOG_ADD_VALUE, 0);
}
public AddValueLoggable(Txn transaction, long pageNum, short tid, byte[] value) {
this(DOMFile.LOG_ADD_VALUE, transaction, pageNum, tid, value);
}
protected AddValueLoggable(byte id, Txn transaction, long pageNum, short tid, byte[] value) {
super(id, transaction.getId());
this.pageNum = pageNum;
this.tid = tid;
this.value = value;
}
public AddValueLoggable(DBBroker broker, long transactionId) {
this(DOMFile.LOG_ADD_VALUE, broker, transactionId);
}
protected AddValueLoggable(byte id, DBBroker broker, long transactionId) {
super(id, transactionId);
this.domDb = ((NativeBroker)broker).getDOMFile();
}
public void clear(Txn transaction, long pageNum, short tid, byte[] value) {
super.clear(transaction.getId());
this.pageNum = pageNum;
this.tid = tid;
this.value = value;
}
public void write(ByteBuffer out) {
out.putInt((int)pageNum);
out.putShort(tid);
out.putShort((short)value.length);
out.put(value);
}
public void read(ByteBuffer in) {
pageNum = in.getInt();
tid = in.getShort();
value = new byte[in.getShort()];
in.get(value);
}
public int getLogSize() {
return 8 + value.length;
}
public void redo() throws LogException {
domDb.redoAddValue(this);
}
public void undo() throws LogException {
domDb.undoAddValue(this);
}
public String dump() {
return super.dump() + " - added value; tid = " + tid + " to page " + pageNum;
}
}