/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-04 The eXist Project
* 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.index;
import java.nio.ByteBuffer;
import org.exist.storage.DBBroker;
import org.exist.storage.journal.LogException;
import org.exist.storage.txn.Txn;
import org.exist.util.ByteArray;
import org.exist.util.FixedByteArray;
/**
* @author wolf
*
*/
public class StoreValueLoggable extends AbstractBFileLoggable {
protected long page;
protected short tid;
protected ByteArray value;
/**
*
*
* @param transaction
* @param fileId
* @param page
* @param tid
* @param value
*/
public StoreValueLoggable(Txn transaction, byte fileId, long page, short tid, ByteArray value) {
super(BFile.LOG_STORE_VALUE, fileId, transaction);
this.page = page;
this.tid = tid;
this.value = value;
}
public StoreValueLoggable(DBBroker broker, long transactionId) {
super(broker, transactionId);
}
/* (non-Javadoc)
* @see org.exist.storage.log.Loggable#write(java.nio.ByteBuffer)
*/
@Override
public void write(ByteBuffer out) {
super.write(out);
out.putInt((int) page);
out.putShort(tid);
out.putShort((short) value.size());
value.copyTo(out);
}
/* (non-Javadoc)
* @see org.exist.storage.log.Loggable#read(java.nio.ByteBuffer)
*/
@Override
public void read(ByteBuffer in) {
super.read(in);
page = in.getInt();
tid = in.getShort();
final int len = in.getShort();
final byte[] data = new byte[len];
in.get(data);
value = new FixedByteArray(data, 0, len);
}
/* (non-Javadoc)
* @see org.exist.storage.log.Loggable#getLogSize()
*/
@Override
public int getLogSize() {
return super.getLogSize() + 8 + value.size();
}
@Override
public void redo() throws LogException {
getIndexFile().redoStoreValue(this);
}
@Override
public void undo() throws LogException {
getIndexFile().undoStoreValue(this);
}
@Override
public String dump() {
return super.dump() + " - stored value with tid " + tid + " on page " + page;
}
}