OfflineScreenFactory.java

/*
 * Copyright 2013 cruxframework.org.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.cruxframework.crux.core.rebind.screen;

import org.apache.commons.lang.StringUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

/**
 * @author Thiago da Rosa de Bustamante
 *
 */
public class OfflineScreenFactory
{
	private static OfflineScreenFactory instance = new OfflineScreenFactory();
	
	/**
	 * Singleton Constructor
	 */
	private OfflineScreenFactory() 
	{
	}
	
	/**
	 * Singleton method
	 * @return
	 */
	public static OfflineScreenFactory getInstance()
	{
		return instance;
	}
	
	public OfflineScreen getOfflineScreen(String id, Document screen) throws ScreenConfigException
	{
		Element screenElement = screen.getDocumentElement();
		String moduleName = screenElement.getAttribute("moduleName");
		String screenId = screenElement.getAttribute("screenId");

//		Module mod = Modules.getInstance().getModule(moduleName);
//		if (mod == null)
//		{
//			throw new ScreenConfigException("No module declared on screen ["+id+"].");
//		}
		String relativeScreenId = null;//Modules.getInstance().getRelativeScreenId(mod, id).replace(".offline.xml", ".html");
		
		OfflineScreen result = new OfflineScreen(relativeScreenId, moduleName, screenId);

		NodeList nodes = screenElement.getChildNodes();
		for (int i = 0; i < nodes.getLength(); i++)
		{
			Node item = nodes.item(i);
			if (item instanceof Element)
			{
				String nodeName = item.getNodeName();
				if(!StringUtils.isEmpty(nodeName))
				{
					if (nodeName.equals("includes"))
					{
						processIncludes(result, item);
					}
					else if (nodeName.equals("excludes"))
					{
						processExcludes(result, item);
					} 
				}
			}
		}
	    
    return result;
  }

	private void processExcludes(OfflineScreen result, Node item)
  {
		NodeList children = item.getChildNodes();
		for (int i = 0; i < children.getLength(); i++)
		{
			Node child = children.item(i);
			if (child instanceof Element)
			{
				String exclude = ((Element) child).getAttribute("path");
				result.addExclude(exclude);
			}
		}
  }

	private void processIncludes(OfflineScreen result, Node item)
  {
		NodeList children = item.getChildNodes();
		for (int i = 0; i < children.getLength(); i++)
		{
			Node child = children.item(i);
			if (child instanceof Element)
			{
				String include = ((Element) child).getAttribute("path");
				result.addInclude(include);
			}
		}
  }
}