// $Id: CrDupParamName.java,v 1.14 2004/09/21 19:03:26 mvw Exp $
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// File: CrDupParamName.java
// Classes: CrDupParamName
// Original Author: jrobbins@ics.uci.edu
// $Id: CrDupParamName.java,v 1.14 2004/09/21 19:03:26 mvw Exp $

package org.argouml.uml.cognitive.critics;

import java.util.Iterator;
import java.util.Vector;
import org.argouml.cognitive.Designer;
import org.argouml.cognitive.critics.Critic;
import org.argouml.model.ModelFacade;

/** Well-formedness rule [1] for MBehavioralFeature. See page 28 of UML 1.1
 *  Semantics. OMG document ad/97-08-04.
 */
public class CrDupParamName extends CrUML {

    /**
     * The constructor.
     * 
     */
    public CrDupParamName() {
	setHeadline("Duplicate Parameter Name");

	addSupportedDecision(CrUML.DEC_CONTAINMENT);
	setKnowledgeTypes(Critic.KT_SYNTAX);
    }

    /**
     * @see org.argouml.uml.cognitive.critics.CrUML#predicate2(
     * java.lang.Object, org.argouml.cognitive.Designer)
     */
    public boolean predicate2(Object dm, Designer dsgr) {
	if (!ModelFacade.isABehavioralFeature(dm)) {
	    return NO_PROBLEM;
	}

	Object bf = /*(MBehavioralFeature)*/ dm;
	Vector namesSeen = new Vector();
	Iterator params = ModelFacade.getParameters(bf).iterator();
	while (params.hasNext()) {
	    Object p = /*(MParameter)*/ params.next();
	    if (ModelFacade.isReturn(p)) {
		continue;
	    }

	    String pName = ModelFacade.getName(p);
	    if (pName == null || "".equals(pName)) {
		continue;
	    }

	    if (namesSeen.contains(pName)) {
		return PROBLEM_FOUND;
	    }

	    namesSeen.addElement(pName);
	}

	return NO_PROBLEM;
    }

} /* end class CrDupParamName.java */