jspviewhandlerimpl.java

一个使用struts+hibernate+spring开发的完的网站源代码。

/*
 * Copyright 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.myfaces.application.jsp;

import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;

import javax.faces.FacesException;
import javax.faces.application.Application;
import javax.faces.application.ViewHandler;
import javax.faces.component.UIViewRoot;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.render.RenderKitFactory;
import javax.portlet.PortletURL;
import javax.portlet.RenderResponse;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.myfaces.portlet.MyFacesGenericPortlet;
import org.apache.myfaces.portlet.PortletUtil;
import org.apache.myfaces.util.DebugUtils;
import org.apache.myfaces.webapp.webxml.ServletMapping;
import org.apache.myfaces.webapp.webxml.WebXml;

/**
 * @author Thomas Spiegl (latest modification by $Author: matzew $)
 * @version $Revision: 1.35 $ $Date: 2005/03/10 15:44:59 $
 * $Log: JspViewHandlerImpl.java,v $
 * Revision 1.35  2005/03/10 15:44:59  matzew
 * Patch for supporting Strut-Faces form Mike Traum (MYFACES-121)
 *
 * Revision 1.34  2005/02/10 20:31:21  matzew
 * organized import statements
 *
 * Revision 1.33  2005/02/10 20:24:17  matzew
 * closed MYFACES-101 in Jira; Thanks to Stan Silvert (JBoss Group)
 *
 * Revision 1.32  2005/01/27 02:38:44  svieujot
 * Remove portlet-api dependency while keeping portlet support.
 *
 * Revision 1.31  2005/01/26 17:03:12  matzew
 * MYFACES-86. portlet support provided by Stan Silver (JBoss Group)
 *
 * Revision 1.30  2004/10/13 11:50:59  matze
 * renamed packages to org.apache
 *
 * Revision 1.29  2004/10/05 08:22:55  manolito
 * #1031187 [PATCH] JspViewHandlerImpl: Remove dep on ServletRequest
 *
 * Revision 1.28  2004/09/02 09:04:14  manolito
 * typing errors in comments
 *
 * Revision 1.27  2004/09/01 18:32:55  mwessendorf
 * Organize Imports
 *
 * Revision 1.26  2004/08/11 23:09:35  o_rossmueller
 * handle character encoding as described in section 2.5.2.2 of JSF 1.1
 *
 * Revision 1.25  2004/08/11 22:56:30  o_rossmueller
 * handle character encoding as described in section 2.5.2.2 of JSF 1.1
 *
 * Revision 1.24  2004/07/16 08:34:01  manolito
 * cosmetic change
 *
 * Revision 1.23  2004/07/10 06:35:08  mwessendorf
 * is defaultRenderKitId set in faces-config.xml ?
 *
 * Revision 1.22  2004/07/01 22:05:20  mwessendorf
 * ASF switch
 *
 * Revision 1.21  2004/05/18 12:02:14  manolito
 * getActionURL and getResourceURL must not call encodeActionURL or encodeResourceURL
 *
 * Revision 1.20  2004/05/12 01:41:31  o_rossmueller
 * fix #951896: added state params to link URLs for ALLOW_JAVASCRIPT=false
 *
 * Revision 1.19  2004/04/27 07:37:56  manolito
 * bugfix: handleCharacterEncoding must be called before any request parameters are retrieved
 *
 * Revision 1.18  2004/04/05 09:16:24  manolito
 * javadoc header
 *
 */
public class JspViewHandlerImpl
        extends ViewHandler
{
    private static final Log log = LogFactory.getLog(JspViewHandlerImpl.class);
    public static final String FORM_STATE_MARKER     = "<!--@@JSF_FORM_STATE_MARKER@@-->";
    public static final int    FORM_STATE_MARKER_LEN = FORM_STATE_MARKER.length();


    public JspViewHandlerImpl()
    {
        if (log.isTraceEnabled()) log.trace("New ViewHandler instance created");
    }

    public Locale calculateLocale(FacesContext facesContext)
    {
        Iterator locales = facesContext.getExternalContext().getRequestLocales();
        while (locales.hasNext())
        {
            Locale locale = (Locale)locales.next();
            for (Iterator it = facesContext.getApplication().getSupportedLocales(); it.hasNext();)
            {
                Locale supportLocale = (Locale)it.next();
                // higher priority to a language match over an exact match
                // that occures further down (see Jstl Reference 1.0 8.3.1)
                if (locale.getLanguage().equals(supportLocale.getLanguage()) &&
                    (supportLocale.getCountry() == null ||
                     supportLocale.getCountry().length() == 0))
                {
                    return supportLocale;
                }
                else if (supportLocale.equals(locale))
                {
                    return supportLocale;
                }
            }
        }

        Locale defaultLocale = facesContext.getApplication().getDefaultLocale();
        return defaultLocale != null ? defaultLocale : Locale.getDefault();
    }

    public String calculateRenderKitId(FacesContext facesContext)
    {	
    	String renderKitId = facesContext.getApplication().getDefaultRenderKitId();
        return (renderKitId!=null) ? renderKitId : RenderKitFactory.HTML_BASIC_RENDER_KIT;
        //TODO: how to calculate from client?
    }

    /**
     */
    public UIViewRoot createView(FacesContext facesContext, String viewId)
    {
        Locale currentLocale = null;
        String currentRenderKitId = null;
        UIViewRoot uiViewRoot = facesContext.getViewRoot();
        if (uiViewRoot != null)
        {
            //Remember current locale and renderKitId
            currentLocale = uiViewRoot.getLocale();
            currentRenderKitId = uiViewRoot.getRenderKitId();
        }

        uiViewRoot = (UIViewRoot)facesContext.getApplication().createComponent(UIViewRoot.COMPONENT_TYPE);
        uiViewRoot.setViewId(viewId);

        if (currentLocale != null)
        {
            //set old locale
            uiViewRoot.setLocale(currentLocale);
        }
        else
        {
            //calculate locale
            uiViewRoot.setLocale(calculateLocale(facesContext));
        }

        if (currentRenderKitId != null)
        {
            //set old renderKit
            uiViewRoot.setRenderKitId(currentRenderKitId);
        }
        else
        {
            //calculate renderKit
            uiViewRoot.setRenderKitId(calculateRenderKitId(facesContext));
        }

        if (log.isTraceEnabled()) log.trace("Created view " + viewId);
        return uiViewRoot;
    }

    public String getActionURL(FacesContext facesContext, String viewId)
    {
        if (PortletUtil.isRenderResponse(facesContext))
        {
            RenderResponse response = (RenderResponse)facesContext.getExternalContext().getResponse();
            PortletURL url = response.createActionURL();
            url.setParameter(MyFacesGenericPortlet.VIEW_ID, viewId);
            return url.toString();
        }
        
        String path = getViewIdPath(facesContext, viewId);
        if (path.length() > 0 && path.charAt(0) == '/')
        {
            return facesContext.getExternalContext().getRequestContextPath() + path;
        }
        else
        {
            return path;
        }
    }

    public String getResourceURL(FacesContext facesContext, String path)