| /* |
| * $Id$ |
| * |
| * Copyright 1999-2004 The Apache Software Foundation. |
| * |
| * 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.apache.struts.webapp.tiles.dynPortal; |
| |
| import java.util.List; |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import javax.servlet.http.HttpSession; |
| import org.apache.struts.action.Action; |
| import org.apache.struts.action.ActionForm; |
| import org.apache.struts.action.ActionForward; |
| import org.apache.struts.action.ActionMapping; |
| import org.apache.struts.tiles.ComponentContext; |
| |
| |
| /** |
| * Implementation of <strong>Action</strong> that populates an instance of |
| * <code>SubscriptionForm</code> from the currently specified subscription. |
| * |
| */ |
| |
| public final class RetrievePortalAction extends Action { |
| |
| /** Name use to store settings in session context */ |
| public static String USER_PORTAL_SETTINGS = "DynamicPortal.USER_PORTAL_SETTINGS"; |
| /** Tile parameter name */ |
| public static String PARAM_NUMCOLS = "numCols"; |
| /** Tile parameter name */ |
| public static String PARAM_LIST = "list"; |
| /** Tile parameter name */ |
| public static String PARAM_LIST_LABELS = "listLabels"; |
| // --------------------------------------------------------- Public Methods |
| |
| |
| /** |
| * Process the specified HTTP request, and create the corresponding HTTP |
| * response (or forward to another web component that will create it). |
| * Return an <code>ActionForward</code> instance describing where and how |
| * control should be forwarded, or <code>null</code> if the response has |
| * already been completed. |
| * |
| * @param mapping The ActionMapping used to select this instance |
| * @param actionForm The optional ActionForm bean for this request (if any) |
| * @param request The HTTP request we are processing |
| * @param response The HTTP response we are creating |
| * |
| * @exception Exception if the application business logic throws |
| * an exception |
| */ |
| public ActionForward execute( |
| ActionMapping mapping, |
| ActionForm form, |
| HttpServletRequest request, |
| HttpServletResponse response) |
| throws Exception { |
| System.out.println("Enter action RetrievePortalAction"); |
| // Get current session. |
| HttpSession session = request.getSession(); |
| |
| // Try to retrieve tile context |
| ComponentContext context = ComponentContext.getContext( request ); |
| if( context == null ) |
| { |
| throw new ServletException( "This action must be called by a Tile, not directly" ); |
| } |
| |
| // Get user portal list from user context |
| PortalSettings settings = getSettings( context, session ); |
| |
| // Set parameters for tiles |
| context.putAttribute( "numCols", Integer.toString(settings.getNumCols()) ); |
| for( int i=0; i<settings.getNumCols(); i++ ) |
| context.putAttribute( "list"+i, settings.getListAt(i) ); |
| |
| System.out.println("Exit action RetrievePortalAction"); |
| return (mapping.findForward("success")); |
| } |
| |
| /** |
| * Retrieve user setting from session. |
| * If settings are not found, initialized them. |
| */ |
| public static PortalSettings getSettings( ComponentContext context, HttpSession session ) |
| { |
| // Get user portal list from user context |
| PortalSettings settings = (PortalSettings)session.getAttribute( USER_PORTAL_SETTINGS ); |
| |
| if( settings == null ) |
| { // List doesn't exist, create it and initialize it from Tiles parameters |
| settings = new PortalSettings(); |
| settings.setNumCols( (String)context.getAttribute( PARAM_NUMCOLS ) ); |
| for( int i=0; i<settings.getNumCols(); i++ ) |
| { |
| List col = (List)context.getAttribute( ((String)PARAM_LIST+i) ); |
| List labels = (List)context.getAttribute( ((String)PARAM_LIST_LABELS+i) ); |
| settings.addChoices( col, labels ); |
| settings.addList( col ); |
| } // end loop |
| |
| // Save user settings in session |
| session.setAttribute( USER_PORTAL_SETTINGS, settings); |
| } // end if |
| |
| return settings; |
| } |
| |
| |
| } |
| |