Ptidej-v5.2-master/POM Tests/data/ArgoUML_0.28/src/org/argouml/uml/ui/foundation/extension_mechanisms/UMLMetaClassComboBoxModel.java
// $Id: UMLMetaClassComboBoxModel.java 14238 2008-03-27 16:03:28Z tfmorris $
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// software and its documentation without fee, and without a written
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// $header$
package org.argouml.uml.ui.foundation.extension_mechanisms;

import java.util.Collection;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;

import org.argouml.model.Model;
import org.argouml.uml.ui.UMLComboBoxModel2;

/**
 * A model for selecting a UML metaclass. Originally designed for use in
 * selecting the base class of stereotypes in UML 1.3, but now used to select
 * the type of a TagDefinition.
 * 
 * @author mkl
 */
public class UMLMetaClassComboBoxModel extends UMLComboBoxModel2 {

    private List<String> metaClasses;

    /**
     * Construct a default combo box model.
     */
    public UMLMetaClassComboBoxModel() {
        super("tagType", true);
        Collection<String> tmpMetaClasses =
                Model.getCoreHelper().getAllMetatypeNames();
        
        if (tmpMetaClasses instanceof List) {
            metaClasses = (List<String>) tmpMetaClasses;
        } else {
            metaClasses = new LinkedList<String>(tmpMetaClasses);
        }
        tmpMetaClasses.addAll(Model.getCoreHelper().getAllMetaDatatypeNames());
        try {
            Collections.sort(metaClasses);
        } catch (UnsupportedOperationException e) {
            // We got passed an unmodifiable List.  Copy it and sort the result
            metaClasses = new LinkedList<String>(tmpMetaClasses);
            Collections.sort(metaClasses);
        }
    }

    /*
     * @see org.argouml.uml.ui.UMLComboBoxModel2#getSelectedModelElement()
     */
    @Override
    protected Object getSelectedModelElement() {
        if (getTarget() != null) {
            return Model.getFacade().getType(getTarget());
        }
        return null;
    }

    /*
     * @see org.argouml.uml.ui.UMLComboBoxModel2#buildModelList()
     */
    protected void buildModelList() {
        setElements(metaClasses);
    }

    /*
     * @see org.argouml.uml.ui.UMLComboBoxModel2#isValidElement(Object)
     */
    protected boolean isValidElement(Object element) {
        return metaClasses.contains(element);
    }

}
