/*
* Copyright (C) 2012 Timo Vesalainen
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 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 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 org.vesalainen.parsers.sql.dsql;
import com.google.appengine.api.datastore.Key;
import org.vesalainen.parsers.sql.ObjectComparator;
/**
* @author Timo Vesalainen
*/
public class DSQLObjectComparator extends ObjectComparator
{
private DSQLEngine engine;
public DSQLObjectComparator(DSQLEngine engine)
{
this.engine = engine;
}
@Override
public int compare(Object o1, Object o2)
{
if ((o1 instanceof Key) && (o2 instanceof String))
{
String s = (String) o2;
o2 = engine.stringToKey(s);
}
if ((o1 instanceof String) && (o2 instanceof Key))
{
String s = (String) o1;
o1 = engine.stringToKey(s);
}
return super.compare(o1, o2);
}
}