/***********************************************************************
 * Copyright (c) 2008 by SAP AG, Walldorf. 
 * 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:
 *     SAP AG - initial API and implementation
 ***********************************************************************/
package org.eclipse.jst.jee.ui.internal.navigator.web;

import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jst.j2ee.internal.plugin.J2EEPlugin;
import org.eclipse.jst.javaee.web.WebApp;
import org.eclipse.jst.javaee.web.WelcomeFileList;
import org.eclipse.jst.jee.ui.internal.Messages;
import org.eclipse.jst.jee.ui.internal.navigator.AbstractGroupProvider;
import org.eclipse.jst.jee.ui.plugin.JEEUIPluginIcons;
import org.eclipse.swt.graphics.Image;

/**
 * Welcome pages group in Deployment Descriptor node. 
 * 
 * @author Dimitar Giormov
 *
 */
public class GroupWelcomePagesItemProvider extends AbstractGroupProvider{

    private static Image WELCOME_PAGES;

    private static Image WELCOME_PAGE;
    
    private List children = null;

    public GroupWelcomePagesItemProvider(WebApp webApp) {
        super(webApp);
        text = Messages.WELCOME_PAGES_ITEM_PROVIDER;
    }

    @Override
    public List getChildren() {
      if (children != null){
        return children;
      }
        if (javaee != null){
          List welcomeFileLists = ((WebApp) javaee).getWelcomeFileLists();
          if (welcomeFileLists.size()>0){
            children =  new ArrayList();
            for (Object object : welcomeFileLists) {
              List welcomeFiles = ((WelcomeFileList)object).getWelcomeFiles();
              for (Object object2 : welcomeFiles) {
                if(object2 != null && !"".equals( ((String)object2).trim())){ //$NON-NLS-1$
                  children.add(new WebArtifactNode((String) object2, getWelcomePageImage()));
                }
              }
            }
            return children;
          }
            return null;
        }
        return null;
    }

    @Override
    public Image getImage() {
        return getWelcomePagesImage();
    }

    @Override
    public boolean hasChildren() {
        return !getChildren().isEmpty();
    }

    public static Image getWelcomePagesImage() {
        if (WELCOME_PAGES == null) {
            URL url = (URL) J2EEPlugin.getPlugin().getImage(JEEUIPluginIcons.GROUP_WELCOME_PAGES);
            ImageDescriptor imageDescriptor = ImageDescriptor.createFromURL(url); 
            WELCOME_PAGES = imageDescriptor.createImage();
        }
        return WELCOME_PAGES;
    }
    
    public static Image getWelcomePageImage() {
      if (WELCOME_PAGE == null) {
          URL url = (URL) J2EEPlugin.getPlugin().getImage(JEEUIPluginIcons.GROUP_WELCOME_PAGE);
          ImageDescriptor imageDescriptor = ImageDescriptor.createFromURL(url); 
          WELCOME_PAGE = imageDescriptor.createImage();
      }
      return WELCOME_PAGE;
  }

}