/* 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.slots;
import com.db4o.foundation.*;
import com.db4o.internal.freespace.*;
import com.db4o.internal.ids.*;
/**
* @exclude
*/
public class IdSystemSlotChange extends SystemSlotChange {
private Collection4 _freed;
public IdSystemSlotChange(int id) {
super(id);
}
@Override
protected void free(FreespaceManager freespaceManager, Slot slot) {
if(slot.isNull()){
return;
}
if(_freed == null){
_freed = new Collection4();
}
_freed.add(slot);
}
@Override
public void accumulateFreeSlot(TransactionalIdSystemImpl idSystem, FreespaceCommitter freespaceCommitter, boolean forFreespace) {
if( forFreespace() != forFreespace){
return;
}
super.accumulateFreeSlot(idSystem, freespaceCommitter, forFreespace);
if(_freed == null){
return;
}
Iterator4 iterator = _freed.iterator();
while(iterator.moveNext()){
freespaceCommitter.delayedFree((Slot) iterator.current(), freeToSystemFreespaceSystem());
}
}
protected boolean freeToSystemFreespaceSystem(){
return true;
}
}