/* 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.defragment;
import com.db4o.foundation.*;
import com.db4o.internal.*;
public class IDMappingCollector {
private final static int ID_BATCH_SIZE=4096;
private TreeInt _ids;
void createIDMapping(DefragmentServicesImpl context, int objectID, boolean isClassID) {
if(batchFull()) {
flush(context);
}
_ids=TreeInt.add(_ids,(isClassID ? -objectID : objectID));
}
private boolean batchFull() {
return _ids!=null&&_ids.size()==ID_BATCH_SIZE;
}
public void flush(DefragmentServicesImpl context) {
if(_ids==null) {
return;
}
Iterator4 idIter=new TreeKeyIterator(_ids);
while(idIter.moveNext()) {
int objectID=((Integer)idIter.current()).intValue();
boolean isClassID=false;
if(objectID<0) {
objectID=-objectID;
isClassID=true;
}
if(DefragmentConfig.DEBUG){
int mappedID = context.mappedID(objectID, -1);
// seen object ids don't come by here anymore - any other candidates?
if(mappedID>=0) {
throw new IllegalStateException();
}
}
context.mapIDs(objectID,context.targetNewId(), isClassID);
}
context.mapping().commit();
_ids=null;
}
}