// $Id: UMLUseCaseExtensionPointListModel.java 12801 2007-06-09 15:49:57Z mvw $
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package org.argouml.uml.ui.behavior.use_cases;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.argouml.model.Model;
import org.argouml.uml.ui.UMLModelElementOrderedListModel2;

/**
 * Model for the ExtensionPoints of a UseCase. <p>
 *
 * TODO: This should NOT be an ordered list, according the UML standard!
 * Shall we stop supporting the move up/down features?
 *
 * @since Oct 7, 2002
 * @author jaap.branderhorst@xs4all.nl
 */
public class UMLUseCaseExtensionPointListModel
    extends UMLModelElementOrderedListModel2 {

    /**
     * Constructor for UMLUseCaseExtensionPointListModel.
     */
    public UMLUseCaseExtensionPointListModel() {
        super("extensionPoint");
    }

    /*
     * @see org.argouml.uml.ui.UMLModelElementListModel2#buildModelList()
     */
    protected void buildModelList() {
        setAllElements(Model.getFacade().getExtensionPoints(getTarget()));
    }

    /*
     * @see org.argouml.uml.ui.UMLModelElementListModel2#isValidElement(Object)
     */
    protected boolean isValidElement(Object o) {
        return Model.getFacade().getExtensionPoints(getTarget()).contains(o);
    }

    /*
     * @see org.argouml.uml.ui.UMLModelElementOrderedListModel2#moveDown(int)
     */
    protected void moveDown(int index) {
        Object usecase = getTarget();
        List c = new ArrayList(Model.getFacade().getExtensionPoints(usecase));
        if (index < c.size() - 1) {
            Collections.swap(c, index, index + 1);
            Model.getUseCasesHelper().setExtensionPoints(usecase, c);
        }
    }

    /**
     * @see org.argouml.uml.ui.UMLModelElementOrderedListModel2#moveToBottom(int)
     */
    @Override
    protected void moveToBottom(int index) {
        Object usecase = getTarget();
        List c = new ArrayList(Model.getFacade().getExtensionPoints(usecase));
        if (index < c.size() - 1) {
            Object mem1 = c.get(index);

            c.remove(mem1);
            c.add(c.size(), mem1);
            Model.getUseCasesHelper().setExtensionPoints(usecase, c);
        }
    }

    /**
     * @see org.argouml.uml.ui.UMLModelElementOrderedListModel2#moveToTop(int)
     */
    @Override
    protected void moveToTop(int index) {
        Object usecase = getTarget();
        List c = new ArrayList(Model.getFacade().getExtensionPoints(usecase));
        if (index > 0) {
            Object mem1 = c.get(index);

            c.remove(mem1);
            c.add(0, mem1);
            Model.getUseCasesHelper().setExtensionPoints(usecase, c);
        }
    }
}