// $Id: CrNodeInstanceWithoutClassifier.java,v 1.12 2004/09/21 19:03:26 mvw Exp $
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// File: CrNodeInstanceInsideElement.java
// Classes: CrNodeInstanceWithoutClassifier
// Original Author: jrobbins@5eichler@informatik.uni-hamburg.de

package org.argouml.uml.cognitive.critics;

import java.util.Collection;
import java.util.Iterator;
import org.argouml.cognitive.Designer;
import org.argouml.cognitive.ToDoItem;
import org.argouml.uml.cognitive.UMLToDoItem;
import org.argouml.model.ModelFacade;
import org.argouml.uml.diagram.deployment.ui.FigMNodeInstance;
import org.argouml.uml.diagram.deployment.ui.UMLDeploymentDiagram;
import org.tigris.gef.util.VectorSet;
/**
 * A critic to detect when there are node-instances that
 * are inside another element
 **/

public class CrNodeInstanceWithoutClassifier extends CrUML {

    /**
     * The constructor.
     * 
     */
    public CrNodeInstanceWithoutClassifier() {
	setHeadline("Set NodeInstance-Classifier");
	addSupportedDecision(CrUML.DEC_PATTERNS);
    }

    /**
     * @see org.argouml.uml.cognitive.critics.CrUML#predicate2(
     * java.lang.Object, org.argouml.cognitive.Designer)
     */
    public boolean predicate2(Object dm, Designer dsgr) {
	if (!(dm instanceof UMLDeploymentDiagram)) return NO_PROBLEM;
	UMLDeploymentDiagram dd = (UMLDeploymentDiagram) dm;
	VectorSet offs = computeOffenders(dd); 
	if (offs == null) return NO_PROBLEM; 
	return PROBLEM_FOUND; 
    }

    /**
     * @see org.argouml.cognitive.critics.Critic#toDoItem(j
     * ava.lang.Object, org.argouml.cognitive.Designer)
     */
    public ToDoItem toDoItem(Object dm, Designer dsgr) { 
	UMLDeploymentDiagram dd = (UMLDeploymentDiagram) dm; 
	VectorSet offs = computeOffenders(dd); 
	return new UMLToDoItem(this, offs, dsgr); 
    } 
 
    /**
     * @see org.argouml.cognitive.Poster#stillValid(
     * org.argouml.cognitive.ToDoItem, org.argouml.cognitive.Designer)
     */
    public boolean stillValid(ToDoItem i, Designer dsgr) { 
	if (!isActive()) return false; 
	VectorSet offs = i.getOffenders(); 
	UMLDeploymentDiagram dd = (UMLDeploymentDiagram) offs.firstElement(); 
	//if (!predicate(dm, dsgr)) return false; 
	VectorSet newOffs = computeOffenders(dd); 
	boolean res = offs.equals(newOffs); 
	return res; 
    } 

    /**
     * If there are node-instances that have an enclosing Fig
     * the returned vector-set is not null. Then in the vector-set
     * are the UMLDeploymentDiagram and all FigMNodeInstances with an
     * enclosing Fig
     *
     * @param dd the diagram to check
     * @return the set of offenders
     */
    public VectorSet computeOffenders(UMLDeploymentDiagram dd) { 
	Collection figs = dd.getLayer().getContents(null);
        Iterator figIter = figs.iterator();
	VectorSet offs = null;
	while (figIter.hasNext()) {
	    Object obj = figIter.next();
	    if (!(obj instanceof FigMNodeInstance)) continue;
	    FigMNodeInstance fn = (FigMNodeInstance) obj;
	    if (fn != null) {
		Object noi = /*(MNodeInstance)*/ fn.getOwner();
		if (noi != null) {
		    Collection col = ModelFacade.getClassifiers(noi);
		    if (col.size() > 0) continue;     
		}       
		if (offs == null) {
		    offs = new VectorSet();
		    offs.addElement(dd);
		}
		offs.addElement(fn);
	    }
	}
	return offs;
    } 


} /* end class CrNodeInstanceWithoutClassifier.java */