/* Copyright (C) 2004 - 2008  db4objects Inc.  http://www.db4o.com

This file is part of the db4o open source object database.

db4o is free software; you can redistribute it and/or modify it under
the terms of version 2 of the GNU General Public License as published
by the Free Software Foundation and as clarified by db4objects' GPL 
interpretation policy, available at
http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
Suite 350, San Mateo, CA 94403, USA.

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, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. */
package com.db4o.internal.marshall;

import com.db4o.foundation.*;
import com.db4o.internal.*;
import com.db4o.marshall.*;


/**
 * @exclude
 */
public class CollectIdContext extends ObjectHeaderContext {
    
    private final IdObjectCollector _collector = new IdObjectCollector();
    
    public CollectIdContext(Transaction transaction, ObjectHeader oh, ReadBuffer buffer) {
        super(transaction, buffer, oh);
    }
    

    public void addId() {
        int id = readInt();
        if(id <= 0){
            return;
        }
        addId(id);
    }

    private void addId(int id) {
        _collector.addId(id);
    }
    
    public ClassMetadata classMetadata() {
        return _objectHeader.classMetadata();
    }

    public Tree ids(){
        return _collector.ids();
    }

    public void readID(ReadsObjectIds objectIDHandler) {
        ObjectID objectID = objectIDHandler.readObjectID(this);
        if(objectID.isValid()){
            addId(objectID._id);
        }
    }
    
    public IdObjectCollector collector(){
        return _collector;
    }

}
