package OT;

import java.util.*;

/**
 * Abstract alignment constraint.
 * @version 1999-03-31
 * @author Andrea Heiberg, University of Arizona
*/
abstract public class Align extends Constraint {

	public Align(FeatureType featureType, Edge edge) {
		super(featureType, null, edge, true);
	} //end constructor
	
	/** Culls *all* operations for featureType (we have applied all operations on featureType to completion, since Align is a "global" constraint. **/
	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();) {
			Operation op = (Operation)e.nextElement();
			if (!(op.featureType.toString().equals(featureType1.toString()))) {
				newGen.addElement(op);
			} else {
				sb.append(this.toString() + ": culled " + op + "\n");
			} //end if
		} //end for

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

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

}