package geniusweb.profile.utilityspace;

import java.math.BigDecimal;

import geniusweb.issuevalue.Bid;
import geniusweb.profile.FullOrdering;

/**
 * A utilityspace defines a profile in terms of a utility of a bid. Bids with
 * higher utility are preferred over bids with less utility.
 */
public interface UtilitySpace extends FullOrdering {
	/**
	 * @param bid the {@link Bid} to be evaluated
	 * @return the utility value of this bid. This MUST return a number in the range
	 *         [0,1]. 0 means preferred the least and 1 means preferred the most.
	 */
	BigDecimal getUtility(Bid bid);

	@Override
	default boolean isPreferredOrEqual(Bid bid1, Bid bid2) {
		return getUtility(bid1).compareTo(getUtility(bid2)) >= 0;
	}

}