package org.simantics.interop.test;

import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.exception.DatabaseException;
import org.simantics.layer0.Layer0;

/**
 * * Object comparator that uses type and name of objects to check if objects are comparable. 
 * 
 * Difference value is amount of properties that have different values.
 * 
 * @author Marko Luukkainen <marko.luukkainen@vtt.fi>
 *
 */
public class NameComparator extends TypeComparator {
	
	@Override
	public int compare(ReadGraph g, Resource o1, Resource o2)
			throws DatabaseException {
		if (!compareType(g,o1, o2)) {
			return Integer.MAX_VALUE;
		}
		Layer0 l0 = Layer0.getInstance(g);
		String n1 = g.getPossibleRelatedValue(o1, l0.HasName);
		String n2 = g.getPossibleRelatedValue(o2, l0.HasName);
		if (n1 != null && n2 != null) {
			if (!n1.equals(n2))
				return Integer.MAX_VALUE;
		} else if (n1 == null && n2 == null) {
			
		} else {
			return Integer.MAX_VALUE;
		}
		return propsDiffCount(g,o1, o2);
	}

}