package org.simantics.interop.test;

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

/**
 * 
 * @author Marko Luukkainen <marko.luukkainen@vtt.fi>
 *
 */
public abstract class ObjectComparator {
	
	private GraphComparator comparator;
	
	void setComparator(GraphComparator comparator) {
		this.comparator = comparator;
	}
	
	public GraphComparator getComparator() {
		return comparator;
	}
	
	/**
	 * Compares two resources and returns numeric value of differences. Result value is Integer.MAX_VALUE if objects are not comparable. 
	 * @param g
	 * @param o1
	 * @param o2
	 * @return
	 * @throws DatabaseException
	 */
	public abstract int compare(ReadGraph g, Resource o1, Resource o2) throws DatabaseException;

}