/* $Id: CrInvalidJoin.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) 1996-2007 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

 // agreement is hereby granted, provided that the above copyright notice

 // and this paragraph appear in all copies.  This software program and

 // documentation are copyrighted by The Regents of the University of

 // California. The software program and documentation are supplied "AS

 // IS", without any accompanying services from The Regents. The Regents

 // does not warrant that the operation of the program will be

 // uninterrupted or error-free. The end-user understands that the program

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 // exclusively on the program for any reason.  IN NO EVENT SHALL THE

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 package org.argouml.uml.cognitive.critics;

 import java.util.Collection;

 import java.util.HashSet;

 import java.util.Set;

 import org.argouml.cognitive.Designer;

 import org.argouml.model.Model;

 import org.argouml.uml.cognitive.UMLDecision;

 /**

  * A critic to detect when a join state has the wrong number of

  * transitions.  Implements constraint [4] on Pseudostate in the UML

  * Semantics v1.1, pp. 104.

  *

  * Well-formedness rule [3] for PseudoState. See page 137 of UML 1.4

  * Semantics. OMG document UML 1.4.2 formal/04-07-02.

  *

  * @author jrobbins

  */

 public class CrInvalidJoin extends CrUML {

     /**

      * The constructor.

      */

     public CrInvalidJoin() {

         setupHeadAndDesc();

         addSupportedDecision(UMLDecision.STATE_MACHINES);

         addTrigger("outgoing");

     }

     /*

      * @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().isAPseudostate(dm))) {

             return NO_PROBLEM;

         }

         Object k = Model.getFacade().getKind(dm);

         if (!Model.getFacade().equalsPseudostateKind(k,

                 Model.getPseudostateKind().getJoin())) {

             return NO_PROBLEM;

         }

         Collection outgoing = Model.getFacade().getOutgoings(dm);

         Collection incoming = Model.getFacade().getIncomings(dm);

         int nOutgoing = outgoing == null ? 0 : outgoing.size();

         int nIncoming = incoming == null ? 0 : incoming.size();

         if (nOutgoing > 1) {

             return PROBLEM_FOUND;

         }

         if (nIncoming == 1) {

             return PROBLEM_FOUND;

         }

         return NO_PROBLEM;

     }

     /*

      * @see org.argouml.uml.cognitive.critics.CrUML#getCriticizedDesignMaterials()

      */

     public Set<Object> getCriticizedDesignMaterials() {

         Set<Object> ret = new HashSet<Object>();

         ret.add(Model.getMetaTypes().getPseudostate());

         return ret;

     }

 }