content: /*
   * Copyright (c) 2016, Alex Blewitt, Bandlem Ltd
   * Copyright (c) 2016, Packt Publishing Ltd
   *
   * 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
   */
  package com.packtpub.e4.clock.ui.views;
  
  import java.util.Collection;
  import java.util.Map;
  
  import org.eclipse.jface.viewers.ITreeContentProvider;
  import org.eclipse.jface.viewers.Viewer;
  
  public class TimeZoneContentProvider implements ITreeContentProvider {
  	@SuppressWarnings("rawtypes")
  	public boolean hasChildren(Object element) {
  		if (element instanceof Map) {
  			return !((Map) element).isEmpty();
  		} else if (element instanceof Map.Entry) {
  			return hasChildren(((Map.Entry) element).getValue());
  		} else if (element instanceof Collection) {
  			return !((Collection) element).isEmpty();
  		} else {
  			return false;
  		}
  	}
  
  	@SuppressWarnings("rawtypes")
  	public Object[] getChildren(Object parentElement) {
  		if (parentElement instanceof Map) {
  			return ((Map) parentElement).entrySet().toArray();
  		} else if (parentElement instanceof Map.Entry) {
  			return getChildren(((Map.Entry) parentElement).getValue());
  		} else if (parentElement instanceof Collection) {
  			return ((Collection) parentElement).toArray();
  		} else {
  			return new Object[0];
  		}
  	}
  
  	public Object[] getElements(Object inputElement) {
  		if (inputElement instanceof Object[]) {
  			return (Object[]) inputElement;
  		} else {
  			return new Object[0];
  		}
  	}
  
  	public Object getParent(Object element) {
  		return null;
  	}
  
  	public void dispose() {
  	}
  
  	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
  	}
  }