/* $Id: CrUselessInterface.java 17849 2010-01-12 19:50:34Z linus $
 *****************************************************************************
 * Copyright (c) 2009 Contributors - see below
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    maurelio1234
 *****************************************************************************
 *
 * Some portions of this file was previously release using the BSD License:
 */

// Copyright (c) 1996-2006 The Regents of the University of California. All
// Rights Reserved. Permission to use, copy, modify, and distribute this
// software and its documentation without fee, and without a written
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package org.argouml.uml.cognitive.critics;

import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

import org.argouml.cognitive.Critic;
import org.argouml.cognitive.Designer;
import org.argouml.cognitive.Goal;
import org.argouml.model.Model;
import org.argouml.uml.cognitive.UMLDecision;

/**
 * A critic to detect when a class can never have instances (of
 * itself of any subclasses).
 *
 * @author jrobbins
 */
public class CrUselessInterface extends CrUML {

    /**
     * The constructor.
     */
    public CrUselessInterface() {
        setupHeadAndDesc();
	addSupportedDecision(UMLDecision.INHERITANCE);
	addSupportedGoal(Goal.getUnspecifiedGoal());
	setKnowledgeTypes(Critic.KT_COMPLETENESS);
	addTrigger("realization");
    }

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

	if (!Model.getFacade().isPrimaryObject(dm)) {
            return NO_PROBLEM;
        }


	Iterator iter =
	    Model.getFacade().getSupplierDependencies(dm).iterator();

	while (iter.hasNext()) {
	    if (Model.getFacade().isRealize(iter.next())) {
		return NO_PROBLEM;
            }
        }

	return PROBLEM_FOUND;
    }

    /*
     * @see org.argouml.uml.cognitive.critics.CrUML#getCriticizedDesignMaterials()
     */
    public Set<Object> getCriticizedDesignMaterials() {
        Set<Object> ret = new HashSet<Object>();
        ret.add(Model.getMetaTypes().getInterface());
        return ret;
    }
    
    /**
     * The UID.
     */
    private static final long serialVersionUID = -6586457111453473553L;
} /* end class CrUselessInterface */