/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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.view.facelets;
  
  import java.io.FileNotFoundException;
  import java.io.IOException;
  import java.io.Writer;
  import java.net.URL;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Locale;
  import java.util.Map;
  import java.util.logging.Level;
  import java.util.logging.Logger;
  
  import javax.el.ELException;
  import javax.faces.FacesException;
  import javax.faces.application.ProjectStage;
  import javax.faces.application.StateManager;
  import javax.faces.application.ViewHandler;
  import javax.faces.component.UIViewRoot;
  import javax.faces.context.ExternalContext;
  import javax.faces.context.FacesContext;
  import javax.faces.context.ResponseWriter;
  import javax.faces.render.RenderKit;
  import javax.faces.view.facelets.ResourceResolver;
  import javax.faces.view.facelets.TagDecorator;
  import javax.servlet.ServletRequest;
  import javax.servlet.ServletResponse;
  import javax.servlet.http.HttpServletResponse;
  
  import org.apache.myfaces.view.facelets.compiler.Compiler;
  import org.apache.myfaces.view.facelets.compiler.SAXCompiler;
  import org.apache.myfaces.view.facelets.compiler.TagLibraryConfig;
  import org.apache.myfaces.view.facelets.impl.DefaultFaceletFactory;
  import org.apache.myfaces.view.facelets.impl.DefaultResourceResolver;
  import org.apache.myfaces.view.facelets.tag.TagLibrary;
  import org.apache.myfaces.view.facelets.tag.ui.UIDebug;
  import org.apache.myfaces.view.facelets.util.ReflectionUtil;
  
  /**
   * ViewHandler implementation for Facelets
   * 
   * @deprecated code refactored to FaceletViewDeclarationLanguage
   * @author Jacob Hookom
   * @version $Id: FaceletViewHandler.java 1300255 2012-03-13 17:38:54Z lu4242 $
   */
  @Deprecated
  public class FaceletViewHandler extends ViewHandler
  {
  
      //protected final static Logger log = Logger.getLogger("facelets.viewhandler");
      protected final static Logger log = Logger.getLogger(FaceletViewHandler.class.getName());
  
      public final static long DEFAULT_REFRESH_PERIOD = 2;
      public final static long DEFAULT_REFRESH_PERIOD_PRODUCTION = -1;
  
      public final static String PARAM_REFRESH_PERIOD = "facelets.REFRESH_PERIOD";
  
      /**
       * Spelling error, We'll remove this in a future release.
       * 
       * @deprecated
       */
      public final static String PARAM_REFRESH_PERIO = PARAM_REFRESH_PERIOD;
  
      public final static String PARAM_SKIP_COMMENTS = "facelets.SKIP_COMMENTS";
  
      /**
       * Context initialization parameter for defining what viewIds should be handled by Facelets, and what should not.
       * When left unset, all URLs will be handled by Facelets. When set, it must be a semicolon separated list of either
       * extension mappings or prefix mappings. For example:
       * 
       * <pre>
       * 
       * 
       * 
       *        &lt;context-param&gt;
       *          &lt;param-name&gt;facelets.VIEW_MAPPINGS&lt;/param-name&gt;
       *          &lt;param-value&gt;/demos/*; *.xhtml&lt;/param-value&gt;
       *        &lt;/context-param&gt;
       * 
       * 
      * 
      * </pre>
      * 
      * would use Facelets for processing all viewIds in the "/demos" directory or that end in .xhtml, and use the
      * standard JSP engine for all other viewIds.
      * <p>
      * <strong>NOTE</strong>: when using this parameter, you need to use prefix-mapping for the
      * <code>FacesServlet</code> (that is, <code>/faces/*</code>, not <code>*.jsf</code>).
      * </p>
      */
     public final static String PARAM_VIEW_MAPPINGS = "facelets.VIEW_MAPPINGS";
 
     public final static String PARAM_LIBRARIES = "facelets.LIBRARIES";
 
     public final static String PARAM_DECORATORS = "facelets.DECORATORS";
 
     public final static String PARAM_DEVELOPMENT = "facelets.DEVELOPMENT";
 
     public final static String PARAM_RESOURCE_RESOLVER = "facelets.RESOURCE_RESOLVER";
 
     public final static String PARAM_BUILD_BEFORE_RESTORE = "facelets.BUILD_BEFORE_RESTORE";
 
     public final static String PARAM_BUFFER_SIZE = "facelets.BUFFER_SIZE";
 
     private final static String STATE_KEY = "~facelets.VIEW_STATE~";
 
     private final static int STATE_KEY_LEN = STATE_KEY.length();
 
     private final ViewHandler parent;
 
     private boolean developmentMode = false;
 
     private boolean buildBeforeRestore = false;
 
     private int bufferSize;
 
     private String defaultSuffix;
 
     private FaceletFactory faceletFactory;
 
     // Array of viewId extensions that should be handled by Facelets
     private String[] extensionsArray;
 
     // Array of viewId prefixes that should be handled by Facelets
     private String[] prefixesArray;
 
     /**
      *
      */
     public FaceletViewHandler(ViewHandler parent)
     {
         this.parent = parent;
     }
 
     /**
      * Initialize the ViewHandler during its first request.
      */
     protected void initialize(FacesContext context)
     {
         synchronized (this)
         {
             if (this.faceletFactory == null)
             {
                 log.fine("Initializing");
                 Compiler c = this.createCompiler();
                 this.initializeCompiler(c);
                 this.faceletFactory = this.createFaceletFactory(c);
 
                 this.initializeMappings(context);
                 this.initializeMode(context);
                 this.initializeBuffer(context);
 
                 log.fine("Initialization Successful");
             }
         }
     }
 
     private void initializeMode(FacesContext context)
     {
         ExternalContext external = context.getExternalContext();
         String param = external.getInitParameter(PARAM_DEVELOPMENT);
         this.developmentMode = "true".equals(param);
 
         String restoreMode = external.getInitParameter(PARAM_BUILD_BEFORE_RESTORE);
         this.buildBeforeRestore = "true".equals(restoreMode);
     }
 
     private void initializeBuffer(FacesContext context)
     {
         ExternalContext external = context.getExternalContext();
         String param = external.getInitParameter(PARAM_BUFFER_SIZE);
         this.bufferSize = (param != null && !"".equals(param)) ? Integer.parseInt(param) : -1;
     }
 
     /**
      * Initialize mappings, during the first request.
      */
     private void initializeMappings(FacesContext context)
     {
         ExternalContext external = context.getExternalContext();
         String viewMappings = external.getInitParameter(PARAM_VIEW_MAPPINGS);
         if ((viewMappings != null) && (viewMappings.length() > 0))
         {
             String[] mappingsArray = viewMappings.split(";");
 
             List<String> extensionsList = new ArrayList<String>(mappingsArray.length);
             List<String> prefixesList = new ArrayList<String>(mappingsArray.length);
 
             for (int i = 0; i < mappingsArray.length; i++)
             {
                 String mapping = mappingsArray[i].trim();
                 int mappingLength = mapping.length();
                 if (mappingLength <= 1)
                 {
                     continue;
                 }
 
                 if (mapping.charAt(0) == '*')
                 {
                     extensionsList.add(mapping.substring(1));
                 }
                 else if (mapping.charAt(mappingLength - 1) == '*')
                 {
                     prefixesList.add(mapping.substring(0, mappingLength - 1));
                 }
             }
 
             extensionsArray = new String[extensionsList.size()];
             extensionsList.toArray(extensionsArray);
 
             prefixesArray = new String[prefixesList.size()];
             prefixesList.toArray(prefixesArray);
         }
     }
 
     protected FaceletFactory createFaceletFactory(Compiler c)
     {
 
         // refresh period
         FacesContext ctx = FacesContext.getCurrentInstance();
         long refreshPeriod;
         
         if(ctx.isProjectStage(ProjectStage.Production))
         {
             refreshPeriod = DEFAULT_REFRESH_PERIOD_PRODUCTION;
         }
         else
         {
             refreshPeriod = DEFAULT_REFRESH_PERIOD;
         }
         
         String userPeriod = ctx.getExternalContext().getInitParameter(PARAM_REFRESH_PERIOD);
         if (userPeriod != null && userPeriod.length() > 0)
         {
             refreshPeriod = Long.parseLong(userPeriod);
         }
 
         // resource resolver
         ResourceResolver resolver = new DefaultResourceResolver();
         String resolverName = ctx.getExternalContext().getInitParameter(PARAM_RESOURCE_RESOLVER);
         if (resolverName != null && resolverName.length() > 0)
         {
             try
             {
                 resolver = (ResourceResolver) ReflectionUtil.forName(resolverName).newInstance();
             }
             catch (Exception e)
             {
                 throw new FacesException("Error Initializing ResourceResolver[" + resolverName + "]", e);
             }
         }
 
         // Resource.getResourceUrl(ctx,"/")
         return new DefaultFaceletFactory(c, resolver, refreshPeriod);
     }
 
     protected Compiler createCompiler()
     {
         return new SAXCompiler();
     }
 
     protected void initializeCompiler(Compiler c)
     {
         FacesContext ctx = FacesContext.getCurrentInstance();
         ExternalContext ext = ctx.getExternalContext();
 
         // load libraries
         String libParam = ext.getInitParameter(PARAM_LIBRARIES);
         if (libParam != null)
         {
             libParam = libParam.trim();
             String[] libs = libParam.split(";");
             URL src;
             TagLibrary libObj;
             for (int i = 0; i < libs.length; i++)
             {
                 try
                 {
                     src = ext.getResource(libs[i].trim());
                     if (src == null)
                     {
                         throw new FileNotFoundException(libs[i]);
                     }
                     libObj = TagLibraryConfig.create(ctx, src);
                     c.addTagLibrary(libObj);
                     log.fine("Successfully Loaded Library: " + libs[i]);
                 }
                 catch (IOException e)
                 {
                     log.log(Level.SEVERE, "Error Loading Library: " + libs[i], e);
                 }
             }
         }
 
         // load decorators
         String decParam = ext.getInitParameter(PARAM_DECORATORS);
         if (decParam != null)
         {
             decParam = decParam.trim();
             String[] decs = decParam.split(";");
             TagDecorator decObj;
             for (int i = 0; i < decs.length; i++)
             {
                 try
                 {
                     decObj = (TagDecorator) ReflectionUtil.forName(decs[i]).newInstance();
                     c.addTagDecorator(decObj);
                     log.fine("Successfully Loaded Decorator: " + decs[i]);
                 }
                 catch (Exception e)
                 {
                     log.log(Level.SEVERE, "Error Loading Decorator: " + decs[i], e);
                 }
             }
         }
 
         // skip params?
         String skipParam = ext.getInitParameter(PARAM_SKIP_COMMENTS);
         if (skipParam != null && "true".equals(skipParam))
         {
             c.setTrimmingComments(true);
         }
     }
 
     public UIViewRoot restoreView(FacesContext context, String viewId)
     {
         if (UIDebug.debugRequest(context))
         {
             return new UIViewRoot();
         }
 
         if (!this.buildBeforeRestore || !handledByFacelets(viewId))
         {
             return this.parent.restoreView(context, viewId);
         }
 
         if (this.faceletFactory == null)
         {
             this.initialize(context);
         }
 
         // In JSF 1.2, restoreView() will only be called on postback.
         // But in JSF 1.1, it will be called for an initial request too,
         // in which case we must return null in order to fall through
         // to createView()
 
         ViewHandler outerViewHandler = context.getApplication().getViewHandler();
         String renderKitId = outerViewHandler.calculateRenderKitId(context);
 
         UIViewRoot viewRoot = createView(context, viewId);
         context.setViewRoot(viewRoot);
         try
         {
             this.buildView(context, viewRoot);
         }
         catch (IOException ioe)
         {
             log.log(Level.SEVERE, "Error Building View", ioe);
         }
         context.getApplication().getStateManager().restoreView(context, viewId, renderKitId);
         return viewRoot;
     }
 
     /*
      * (non-Javadoc)
      * 
      * @see javax.faces.application.ViewHandlerWrapper#getWrapped()
      */
     protected ViewHandler getWrapped()
     {
         return this.parent;
     }
 
     protected ResponseWriter createResponseWriter(FacesContext context) throws IOException, FacesException
     {
         ExternalContext extContext = context.getExternalContext();
         RenderKit renderKit = context.getRenderKit();
         // Avoid a cryptic NullPointerException when the renderkit ID
         // is incorrectly set
         if (renderKit == null)
         {
             String id = context.getViewRoot().getRenderKitId();
             throw new IllegalStateException("No render kit was available for id \"" + id + "\"");
         }
 
         ServletResponse response = (ServletResponse) extContext.getResponse();
 
         // set the buffer for content
         if (this.bufferSize != -1)
         {
             response.setBufferSize(this.bufferSize);
         }
 
         // get our content type
         String contentType = (String) context.getAttributes().get("facelets.ContentType");
 
         // get the encoding
         String encoding = (String) context.getAttributes().get("facelets.Encoding");
 
         ResponseWriter writer;
         // append */* to the contentType so createResponseWriter will succeed no matter
         // the requested contentType.
         if (contentType != null && !contentType.equals("*/*"))
         {
             contentType += ",*/*";
         }
         // Create a dummy ResponseWriter with a bogus writer,
         // so we can figure out what content type the ReponseWriter
         // is really going to ask for
         try
         {
             writer = renderKit.createResponseWriter(NullWriter.INSTANCE, contentType, encoding);
         }
         catch (IllegalArgumentException e)
         {
             // Added because of an RI bug prior to 1.2_05-b3. Might as well leave it in case other
             // impls have the same problem. https://javaserverfaces.dev.java.net/issues/show_bug.cgi?id=613
             log.fine("The impl didn't correctly handled '*/*' in the content type list.  Trying '*/*' directly.");
             writer = renderKit.createResponseWriter(NullWriter.INSTANCE, "*/*", encoding);
         }
 
         // Override the JSF provided content type if necessary
         contentType = getResponseContentType(context, writer.getContentType());
         encoding = getResponseEncoding(context, writer.getCharacterEncoding());
 
         // apply them to the response
         response.setContentType(contentType + "; charset=" + encoding);
 
         // removed 2005.8.23 to comply with J2EE 1.3
         // response.setCharacterEncoding(encoding);
 
         // Now, clone with the real writer
         writer = writer.cloneWithWriter(response.getWriter());
 
         return writer;
     }
 
     /**
      * Generate the encoding
      * 
      * @param context
      * @param orig
      * @return
      */
     protected String getResponseEncoding(FacesContext context, String orig)
     {
         String encoding = orig;
 
         // see if we need to override the encoding
         Map<Object, Object> m = context.getAttributes();
         Map<String, Object> sm = context.getExternalContext().getSessionMap();
 
         // 1. check the request attribute
         if (m.containsKey("facelets.Encoding"))
         {
             encoding = (String) m.get("facelets.Encoding");
             if (log.isLoggable(Level.FINEST))
             {
                 log.finest("Facelet specified alternate encoding '" + encoding + "'");
             }
             sm.put(CHARACTER_ENCODING_KEY, encoding);
         }
 
         // 2. get it from request
         Object request = context.getExternalContext().getRequest();
         if (encoding == null && request instanceof ServletRequest)
         {
             encoding = ((ServletRequest) request).getCharacterEncoding();
         }
 
         // 3. get it from the session
         if (encoding == null)
         {
             encoding = (String) sm.get(CHARACTER_ENCODING_KEY);
             if (log.isLoggable(Level.FINEST))
             {
                 log.finest("Session specified alternate encoding '" + encoding + "'");
             }
         }
 
         // 4. default it
         if (encoding == null)
         {
             encoding = "UTF-8";
             if (log.isLoggable(Level.FINEST))
             {
                 log.finest("ResponseWriter created had a null CharacterEncoding, defaulting to UTF-8");
             }
         }
 
         return encoding;
     }
 
     /**
      * Generate the content type
      * 
      * @param context
      * @param orig
      * @return
      */
     protected String getResponseContentType(FacesContext context, String orig)
     {
         String contentType = orig;
 
         // see if we need to override the contentType
         Map<Object, Object> m = context.getAttributes();
         if (m.containsKey("facelets.ContentType"))
         {
             contentType = (String) m.get("facelets.ContentType");
             if (log.isLoggable(Level.FINEST))
             {
                 log.finest("Facelet specified alternate contentType '" + contentType + "'");
             }
         }
 
         // safety check
         if (contentType == null)
         {
             contentType = "text/html";
             if (log.isLoggable(Level.FINEST))
             {
                 log.finest("ResponseWriter created had a null ContentType, defaulting to text/html");
             }
         }
 
         return contentType;
     }
 
     protected void buildView(FacesContext context, UIViewRoot viewToRender) throws IOException, FacesException
     {
         // setup our viewId
         String renderedViewId = this.getRenderedViewId(context, viewToRender.getViewId());
         viewToRender.setViewId(renderedViewId);
 
         if (log.isLoggable(Level.FINE))
         {
             log.fine("Building View: " + renderedViewId);
         }
 
         // grab our FaceletFactory and create a Facelet
         Facelet f = null;
         FaceletFactory.setInstance(this.faceletFactory);
         try
         {
             f = this.faceletFactory.getFacelet(viewToRender.getViewId());
         }
         finally
         {
             FaceletFactory.setInstance(null);
         }
 
         // populate UIViewRoot
         long time = System.currentTimeMillis();
         f.apply(context, viewToRender);
         time = System.currentTimeMillis() - time;
         if (log.isLoggable(Level.FINE))
         {
             log.fine("Took " + time + "ms to build view: " + viewToRender.getViewId());
         }
     }
 
     public void renderView(FacesContext context, UIViewRoot viewToRender) throws IOException, FacesException
     {
 
         // lazy initialize so we have a FacesContext to use
         if (this.faceletFactory == null)
         {
             this.initialize(context);
         }
 
         // exit if the view is not to be rendered
         if (!viewToRender.isRendered())
         {
             return;
         }
 
         // if facelets is not supposed to handle this request
         if (!handledByFacelets(viewToRender.getViewId()))
         {
             this.parent.renderView(context, viewToRender);
             return;
         }
 
         // log request
         if (log.isLoggable(Level.FINE))
         {
             log.fine("Rendering View: " + viewToRender.getViewId());
         }
 
         StateWriter stateWriter = null;
         try
         {
             // build view - but not if we're in "buildBeforeRestore"
             // land and we've already got a populated view. Note
             // that this optimizations breaks if there's a "c:if" in
             // the page that toggles as a result of request processing -
             // should that be handled? Or
             // is this optimization simply so minor that it should just
             // be trimmed altogether?
             if (!this.buildBeforeRestore || viewToRender.getChildren().isEmpty())
             {
                 this.buildView(context, viewToRender);
             }
 
             // setup writer and assign it to the context
             ResponseWriter origWriter = this.createResponseWriter(context);
 
             ExternalContext extContext = context.getExternalContext();
             Writer outputWriter = extContext.getResponseOutputWriter();
 
             // QUESTION: should we use bufferSize? Or, since the
             // StateWriter usually only needs a small bit at the end,
             // should we always use a much smaller size?
             stateWriter = new StateWriter(outputWriter, this.bufferSize != -1 ? this.bufferSize : 1024);
 
             ResponseWriter writer = origWriter.cloneWithWriter(stateWriter);
             context.setResponseWriter(writer);
 
             // force creation of session if saving state there
             StateManager stateMgr = context.getApplication().getStateManager();
             if (!stateMgr.isSavingStateInClient(context))
             {
                 extContext.getSession(true);
             }
 
             long time = System.currentTimeMillis();
 
             // render the view to the response
             writer.startDocument();
             viewToRender.encodeAll(context);
             writer.endDocument();
 
             // finish writing
             writer.close();
 
             boolean writtenState = stateWriter.isStateWritten();
             // flush to origWriter
             if (writtenState)
             {
                 String content = stateWriter.getAndResetBuffer();
                 int end = content.indexOf(STATE_KEY);
                 // See if we can find any trace of the saved state.
                 // If so, we need to perform token replacement
                 if (end >= 0)
                 {
                     // save state
                     Object stateObj = stateMgr.saveSerializedView(context);
                     String stateStr;
                     if (stateObj == null)
                     {
                         stateStr = null;
                     }
                     else
                     {
                         stateMgr.writeState(context, (StateManager.SerializedView) stateObj);
                         stateStr = stateWriter.getAndResetBuffer();
                     }
 
                     int start = 0;
 
                     while (end != -1)
                     {
                         origWriter.write(content, start, end - start);
                         if (stateStr != null)
                         {
                             origWriter.write(stateStr);
                         }
                         start = end + STATE_KEY_LEN;
                         end = content.indexOf(STATE_KEY, start);
                     }
                     origWriter.write(content, start, content.length() - start);
                     // No trace of any saved state, so we just need to flush
                     // the buffer
                 }
                 else
                 {
                     origWriter.write(content);
                 }
             }
 
             time = System.currentTimeMillis() - time;
             if (log.isLoggable(Level.FINE))
             {
                 log.fine("Took " + time + "ms to render view: " + viewToRender.getViewId());
             }
 
         }
         catch (FileNotFoundException fnfe)
         {
             this.handleFaceletNotFound(context, viewToRender.getViewId());
         }
         catch (Exception e)
         {
             this.handleRenderException(context, e);
         }
         finally
         {
             if (stateWriter != null)
             {
                 stateWriter.release();
             }
         }
     }
 
     protected void handleRenderException(FacesContext context, Exception e) 
             throws IOException, ELException, FacesException
     {
         UIViewRoot root = context.getViewRoot();
         StringBuffer sb = new StringBuffer(64);
         sb.append("Error Rendering View");
         if (root != null)
         {
             sb.append('[');
             sb.append(root.getViewId());
             sb.append(']');
         }
         
         log.log(Level.SEVERE, sb.toString(), e);
         
         // rethrow the Exception to be handled by the ExceptionHandler
         if (e instanceof RuntimeException)
         {
             throw (RuntimeException) e;
         }
         else if (e instanceof IOException)
         {
             throw (IOException) e;
         }
         else
         {
             throw new FacesException(e.getMessage(), e);
         }
     }
 
     protected void handleFaceletNotFound(FacesContext context, String viewId) throws FacesException, IOException
     {
         String actualId = this.getActionURL(context, viewId);
         Object respObj = context.getExternalContext().getResponse();
         if (respObj instanceof HttpServletResponse)
         {
             HttpServletResponse respHttp = (HttpServletResponse) respObj;
             respHttp.sendError(HttpServletResponse.SC_NOT_FOUND, actualId);
             context.responseComplete();
         }
     }
 
     /**
      * Determine if Facelets needs to handle this request.
      */
     private boolean handledByFacelets(String viewId)
     {
         // If there's no extensions array or prefixes array, then
         // just make Facelets handle everything
         if ((extensionsArray == null) && (prefixesArray == null))
         {
             return true;
         }
 
         if (extensionsArray != null)
         {
             for (int i = 0; i < extensionsArray.length; i++)
             {
                 String extension = extensionsArray[i];
                 if (viewId.endsWith(extension))
                 {
                     return true;
                 }
             }
         }
 
         if (prefixesArray != null)
         {
             for (int i = 0; i < prefixesArray.length; i++)
             {
                 String prefix = prefixesArray[i];
                 if (viewId.startsWith(prefix))
                 {
                     return true;
                 }
             }
         }
 
         return false;
     }
 
     public String getDefaultSuffix(FacesContext context) throws FacesException
     {
         if (this.defaultSuffix == null)
         {
             ExternalContext extCtx = context.getExternalContext();
             String viewSuffix = extCtx.getInitParameter(ViewHandler.DEFAULT_SUFFIX_PARAM_NAME);
             this.defaultSuffix = (viewSuffix != null) ? viewSuffix : ViewHandler.DEFAULT_SUFFIX;
         }
         return this.defaultSuffix;
     }
 
     protected String getRenderedViewId(FacesContext context, String actionId)
     {
         ExternalContext extCtx = context.getExternalContext();
         String viewId = actionId;
         if (extCtx.getRequestPathInfo() == null)
         {
             String viewSuffix = this.getDefaultSuffix(context);
             viewId = new StringBuffer(viewId).replace(viewId.lastIndexOf('.'), viewId.length(), viewSuffix).toString();
         }
         if (log.isLoggable(Level.FINE))
         {
             log.fine("ActionId -> ViewId: " + actionId + " -> " + viewId);
         }
         return viewId;
     }
 
     public void writeState(FacesContext context) throws IOException
     {
         if (handledByFacelets(context.getViewRoot().getViewId()))
         {
             // Tell the StateWriter that we're about to write state
             StateWriter.getCurrentInstance().writingState();
             // Write the STATE_KEY out. Unfortunately, this will
             // be wasteful for pure server-side state managers where nothing
             // is actually written into the output, but this cannot
             // programatically be discovered
             context.getResponseWriter().write(STATE_KEY);
         }
         else
         {
             this.parent.writeState(context);
         }
     }
 
     public Locale calculateLocale(FacesContext context)
     {
         return this.parent.calculateLocale(context);
     }
 
     public String calculateRenderKitId(FacesContext context)
     {
         return this.parent.calculateRenderKitId(context);
     }
 
     public UIViewRoot createView(FacesContext context, String viewId)
     {
         if (UIDebug.debugRequest(context))
         {
             return new UIViewRoot();
         }
         return this.parent.createView(context, viewId);
     }
 
     public String getActionURL(FacesContext context, String viewId)
     {
         return this.parent.getActionURL(context, viewId);
     }
 
     public String getResourceURL(FacesContext context, String path)
     {
         return this.parent.getResourceURL(context, path);
     }
 
     protected static class NullWriter extends Writer
     {
 
         static final NullWriter INSTANCE = new NullWriter();
 
         public void write(char[] buffer)
         {
         }
 
         public void write(char[] buffer, int off, int len)
         {
         }
 
         public void write(String str)
         {
         }
 
         public void write(int c)
         {
         }
 
         public void write(String str, int off, int len)
         {
         }
 
         public void close()
         {
         }
 
         public void flush()
         {
         }
     }
 }