package OT;

import java.util.*;

/**
 * Constraint penalizing floating features.
 * @version 1999-03-31
 * @author Andrea Heiberg, University of Arizona
*/
public class NoFloat extends Constraint {

	public NoFloat(FeatureType featureType1) {
		super(featureType1, null, null, false);
	} //end constructor 

	/** Returns the number of times that candidate violates this constraint. For each floating feature of featureType1, increment the violation count. **/
	public Integer evaluate(Representation rep, Representation nullRep) {
		int violations = 0;
		
		for (Enumeration e = rep.floatingFeatures.elements(); e.hasMoreElements();) {
			Feature f = (Feature)e.nextElement();
			if (featureType1.equals(f.featureType)) {
				violations++;
			} //end if
		} //end for

		return new Integer(violations);
	} //end evaluate

	/** Removes all InsertFeature 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 InsertFeature) {
				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 if
		} //end for
	
		gen.debug.write(sb.toString());
		sb = null;

		newGen.trimToSize();
		return newGen;
	} //end cullGen


	public String toString() {
		return ("*Float(" + featureType1 + ")");
	} //end toString

}