TreeViewContentProvider.java

/*******************************************************************************
 * Copyright (c) 2011 Softberries Krzysztof Grajek.
 * 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:
 *     Softberries Krzysztof Grajek - initial API and implementation
 ******************************************************************************/
package com.softberries.klerk.gui.helpers.tree;

import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;


public class TreeViewContentProvider implements IStructuredContentProvider, ITreeContentProvider {

	@Override
	public void inputChanged(Viewer v, Object oldInput, Object newInput) {
	}

	@Override
	public void dispose() {
	}

	@Override
	public Object[] getElements(Object parent) {
		return getChildren(parent);
	}

	@Override
	public Object getParent(Object child) {
		if (child instanceof TreeObject) {
			return ((TreeObject) child).getParent();
		}
		return null;
	}

	@Override
	public Object[] getChildren(Object parent) {
		if (parent instanceof TreeParent) {
			return ((TreeParent) parent).getChildren();
		}
		return new Object[0];
	}

	@Override
	public boolean hasChildren(Object parent) {
		if (parent instanceof TreeParent)
			return ((TreeParent) parent).hasChildren();
		return false;
	}
}