// $Id: CrSeqInstanceWithoutClassifier.java,v 1.13 2004/09/21 19:03:25 mvw Exp $
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// File: CrSeqInstanceWithoutClassifier.java
// Classes: CrSeqInstanceWithoutClassifier
// Original Author: 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.sequence.ui.UMLSequenceDiagram;
import org.argouml.uml.diagram.ui.FigNodeModelElement;
import org.tigris.gef.util.VectorSet;

/**
 * A critic to detect when an object in a deployment-diagram
 * is not inside a component or a component-instance
 **/

public class CrSeqInstanceWithoutClassifier extends CrUML {

    /**
     * The constructor.
     * 
     */
    public CrSeqInstanceWithoutClassifier() {
	setHeadline("Set 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 UMLSequenceDiagram)) return NO_PROBLEM;
	UMLSequenceDiagram sd = (UMLSequenceDiagram) dm;
	VectorSet offs = computeOffenders(sd);
	if (offs == null) return NO_PROBLEM;
	return PROBLEM_FOUND;
    }

    /**
     * @see org.argouml.cognitive.critics.Critic#toDoItem(
     * java.lang.Object, org.argouml.cognitive.Designer)
     */
    public ToDoItem toDoItem(Object dm, Designer dsgr) {
	UMLSequenceDiagram sd = (UMLSequenceDiagram) dm;
	VectorSet offs = computeOffenders(sd);
	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();
	UMLSequenceDiagram sd = (UMLSequenceDiagram) offs.firstElement();
	//if (!predicate(dm, dsgr)) return false;
	VectorSet newOffs = computeOffenders(sd);
	boolean res = offs.equals(newOffs);
	return res;
    }

    /**
     * If there are instances that have no classifiers they belong to
     * the returned vector-set is not null. Then in the vector-set
     * are the UMLSequenceDiagram and all FigObjects, FigComponentInstances
     * and FigMNodeInstances with no classifier.
     *
     * @param sd the diagram to check
     * @return the set of offenders
     */
    public VectorSet computeOffenders(UMLSequenceDiagram sd) { 
	Collection figs = sd.getLayer().getContents(null);
        Iterator figIter = figs.iterator();
	VectorSet offs = null;
	while (figIter.hasNext()) {
	    Object obj = figIter.next();
	    if (!(obj instanceof FigNodeModelElement)) continue;
	    FigNodeModelElement fn = (FigNodeModelElement) obj;
	    if (fn != null && (ModelFacade.isAInstance(fn.getOwner()))) {
		Object minst = /*(MInstance)*/ fn.getOwner();
		if (minst != null) {
		    Collection col = ModelFacade.getClassifiers(minst);
		    if (col.size() > 0) continue;     
		}       
		if (offs == null) {
		    offs = new VectorSet();
		    offs.addElement(sd);
		}
		offs.addElement(fn);
	    }
	}
	return offs;
    } 
 
} /* end class CrSeqInstanceWithoutClassifier.java */