Ptidej-v5.2-master/POM Tests/data/ArgoUML_0.28/src/org/argouml/ui/ChildGenSearch.java
// $Id: ChildGenSearch.java 15646 2008-08-29 08:15:40Z tfmorris $
// Copyright (c) 1996-2008 The Regents of the University of California. All
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// software and its documentation without fee, and without a written
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package org.argouml.ui;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.argouml.kernel.Project;
import org.argouml.model.Model;
import org.argouml.uml.diagram.ArgoDiagram;
import org.argouml.util.ChildGenerator;

/**
 * ChildGenerator that returns the "children" of any given part of the project.
 * It traverses a Project to Diagrams and Models, then uses
 * getModelElementContents to traverse the Models.
 * 
 * @author jrobbins
 * @author Tom Morris <tfmorris@gmail.com>
 */
public class ChildGenSearch implements ChildGenerator {
    
    /**
     * Reply a Collection of the children of the given Object
     * {@inheritDoc}
     */
    public Iterator childIterator(Object o) {
        // TODO: This could be made more efficient by working with iterators
        // directly and creating a composite iterator made up of all the 
        // various sub iterators.
        List res = new ArrayList();
        if (o instanceof Project) {
            Project p = (Project) o;
            res.addAll(p.getUserDefinedModelList());
            res.addAll(p.getDiagramList());
        } else if (o instanceof ArgoDiagram) {
            ArgoDiagram d = (ArgoDiagram) o;
            res.addAll(d.getGraphModel().getNodes());
            res.addAll(d.getGraphModel().getEdges());
        } else if (Model.getFacade().isAModelElement(o)) {
            res.addAll(Model.getFacade().getModelElementContents(o));
        }
        
	return res.iterator();
    }

}
