// $Id: CrNoGuard.java,v 1.9 2004/09/21 19:03:26 mvw Exp $
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// software and its documentation without fee, and without a written
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// File: CrNoGuard.java
// Classes: CrNoGuard.java
// Original Author: jrobbins@ics.uci.edu
// $Id: CrNoGuard.java,v 1.9 2004/09/21 19:03:26 mvw Exp $

package org.argouml.uml.cognitive.critics;

import org.argouml.cognitive.Designer;
import org.argouml.cognitive.critics.Critic;
import org.argouml.model.ModelFacade;


/**
 * Critic that fires when there is no guard.
 *
 */
public class CrNoGuard extends CrUML {

    /**
     * The constructor.
     * 
     */
    public CrNoGuard() {
	setHeadline("Add MGuard to Transistion");
	addSupportedDecision(CrUML.DEC_STATE_MACHINES);
	setKnowledgeTypes(Critic.KT_COMPLETENESS);
	addTrigger("guard");
    }

    /**
     * @see org.argouml.uml.cognitive.critics.CrUML#predicate2(
     * java.lang.Object, org.argouml.cognitive.Designer)
     */
    public boolean predicate2(Object dm, Designer dsgr) {
	if (!(ModelFacade.isATransition(dm))) return NO_PROBLEM;
	Object sv = ModelFacade.getSource(dm);
	if (!(ModelFacade.isAPseudostate(sv))) return NO_PROBLEM;
	if (!ModelFacade.
	    equalsPseudostateKind(ModelFacade.getPseudostateKind(sv),
				  ModelFacade.BRANCH_PSEUDOSTATEKIND))
	    return NO_PROBLEM;
	Object g = /*(MGuard)*/ ModelFacade.getGuard(dm);
	boolean noGuard = (g == null 
            || ModelFacade.getExpression(g) == null 
            || ModelFacade.getBody(ModelFacade.getExpression(g)) == null 
            || ((String) ModelFacade.getBody(ModelFacade.getExpression(g)))
                                                    .length() == 0);
	if (noGuard) return PROBLEM_FOUND;
	return NO_PROBLEM;
    }

} /* end class CrNoGuard */