package OT;

import java.util.*;

/**
 * MAX constraint for associations. Penalizes removing associations to features of featureType1.
 * @version 1999-03-31
 * @author Andrea Heiberg, University of Arizona
*/
public class MaxA extends CorrespondAssociation {

	public MaxA(FeatureType featureType1) {
		super(featureType1);
	} //end constructor

	/** Removes all DeleteAssociation operations on featureType1 from gen. **/
	public Gen cullGen(Gen gen) {
		Gen newGen = new Gen(gen.input, gen.languageFeatureTypeSet, gen.debug);
		StringBuffer sb = new StringBuffer();

		for (Enumeration e = gen.elements(); e.hasMoreElements();) {
			boolean match = false;
			Operation op = (Operation)e.nextElement();
			if (op instanceof DeleteAssociation) {
				if (op.featureType.toString().equals(featureType1.toString())) {
					match = true;
					sb.append(this.toString() + ": culled " + op + "\n");
				} //end if
			} //end if
			if (!match) newGen.addElement(op);
		} //end for

		gen.debug.write(sb.toString());
		sb = null;

		return newGen;
	} //end cullGen

	/** Returns the number of times that candidate violates this constraint. **/
	public Integer evaluate(Representation candidate, Representation input) {
		return super.evaluate(candidate, input);
	} //end evaluate

	public String toString() {
		return ("MAX-A(" + featureType1 + ")");
	} //end toString
	
	}