/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o 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 General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see http://www.gnu.org/licenses/. */
package com.db4o.internal.btree;
import com.db4o.foundation.*;
import com.db4o.internal.*;
/**
* @exclude
*/
public class BTreeRemove extends BTreeUpdate {
public BTreeRemove(Transaction transaction, Object obj) {
super(transaction, obj);
}
protected void committed(BTree btree){
btree.notifyRemoveListener(new TransactionContext(_transaction, getObject()));
}
public String toString() {
return "(-) " + super.toString();
}
public boolean isRemove() {
return true;
}
protected Object getCommittedObject() {
return No4.INSTANCE;
}
protected void adjustSizeOnRemovalByOtherTransaction(BTree btree, BTreeNode node) {
// The size was reduced for this entry, let's change back.
btree.sizeChanged(_transaction, node, +1);
}
protected int sizeDiff() {
return 0;
}
}