org.eclipse.viatra2.gui/src/org/eclipse/viatra2/frameworkgui/dialogs/ModelspaceContentProvider.java

/*******************************************************************************
 * Copyright (c) 2004-2008 Istvan Rath and Daniel Varro
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Istvan Rath - initial API and implementation
 *******************************************************************************/

package org.eclipse.viatra2.frameworkgui.dialogs;

import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.viatra2.core.IModelElement;
import org.eclipse.viatra2.framework.IFramework;

/**
 * Content provider used in dialogs for displaying a tree of a model space.
 * @author Istvan Rath
 *
 */
public class ModelspaceContentProvider implements ITreeContentProvider {

	public Object[] getChildren(Object parentElement) {
		if (parentElement instanceof IModelElement) {
			return ((IModelElement) parentElement).getElementsInNamespace()
					.toArray();
		} else
			return null;
	}

	public Object getParent(Object element) {
		if (element instanceof IModelElement) {
			return ((IModelElement) element).getNamespace();
		}
		return null;
	}

	public boolean hasChildren(Object element) {
		if (element instanceof IModelElement) {
			return !((IModelElement) element).getElementsInNamespace()
					.isEmpty();
		}
		return false;
	}

	public Object[] getElements(Object inputElement) {
		if (inputElement instanceof IFramework) {
			return ((IFramework) inputElement).getTopmodel()
					.getModelManager().getRoot().getContents().toArray();
		} else
			return null;
	}

	public void dispose() {
	}

	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
	}

}