/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * 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.seasar.teeda.core.util;

 import javax.faces.application.ViewHandler;

 import javax.faces.context.ExternalContext;

 import javax.faces.context.FacesContext;

 import org.seasar.framework.util.AssertionUtil;

 import org.seasar.teeda.core.portlet.FacesPortlet;

 /**

  * @author higa

  * @author manhole

  */

 public class ExternalContextUtil {

     private ExternalContextUtil() {

     }

     public static String getViewId(ExternalContext externalContext) {

         // PortletSupport

         if (PortletUtil.isPortlet(FacesContext.getCurrentInstance())) {

             String viewId = (String) externalContext.getRequestMap().get(

                     FacesPortlet.VIEW_ID);

             if (viewId == null) {

                 viewId = (String) externalContext.getRequestMap().get(

                         FacesPortlet.DEFAULT_PAGE);

             }

             return viewId;

         } else {

             String viewId = externalContext.getRequestPathInfo();

             if (viewId == null) {

                 viewId = externalContext.getRequestServletPath();

                 final int dot = viewId.lastIndexOf('.');

                 if (dot >= 0) {

                     final String suffix = getSuffix(externalContext);

                     viewId = viewId.substring(0, dot) + suffix;

                 }

             }

             return viewId;

         }

     }

     private static String getSuffix(ExternalContext externalContext) {

         final String defaultSuffix = externalContext

                 .getInitParameter(ViewHandler.DEFAULT_SUFFIX_PARAM_NAME);

         if (defaultSuffix != null) {

             return defaultSuffix;

         }

         return ViewHandler.DEFAULT_SUFFIX;

     }

     public static String encodeActionURL(FacesContext context, String url) {

         AssertionUtil.assertNotNull("FacesContext", context);

         return context.getExternalContext().encodeActionURL(url);

     }

 }