/*
    * 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.compiler;
  
  import java.io.IOException;
  import java.io.Writer;
  
  import javax.el.ELException;
  import javax.faces.FacesException;
  import javax.faces.component.UIComponent;
  import javax.faces.component.UniqueIdVendor;
  import javax.faces.view.facelets.FaceletContext;
  import javax.faces.view.facelets.FaceletException;
  
  import org.apache.myfaces.view.facelets.FaceletCompositionContext;
  import org.apache.myfaces.view.facelets.el.ELText;
  import org.apache.myfaces.view.facelets.tag.jsf.ComponentSupport;
  import org.apache.myfaces.view.facelets.util.FastWriter;
  
  /**
   * @author Jacob Hookom
   * @version $Id: UITextHandler.java 1194849 2011-10-29 09:28:45Z struberg $
   */
  final class UITextHandler extends AbstractUIHandler
  {
  
      private final ELText txt;
  
      private final String alias;
  
      private final int length;
  
      public UITextHandler(String alias, ELText txt)
      {
          this.alias = alias;
          this.txt = txt;
          this.length = txt.toString().length();
      }
  
      public void apply(FaceletContext ctx, UIComponent parent) throws IOException, FacesException, FaceletException,
              ELException
      {
          if (parent != null)
          {
              try
              {
                  ELText nt = this.txt.apply(ctx.getExpressionFactory(), ctx);
                  UIComponent c = new UIText(this.alias, nt);
  
                  UniqueIdVendor uniqueIdVendor
                          = FaceletCompositionContext.getCurrentInstance(ctx).getUniqueIdVendorFromStack();
                  if (uniqueIdVendor == null)
                  {
                      uniqueIdVendor = ComponentSupport.getViewRoot(ctx, parent);
                  }
                  if (uniqueIdVendor != null)
                  {
                      // UIViewRoot implements UniqueIdVendor, so there is no need to cast to UIViewRoot
                      // and call createUniqueId()
                      String uid = uniqueIdVendor.createUniqueId(ctx.getFacesContext(), null);
                      c.setId(uid);
                  }
                  this.addComponent(ctx, parent, c);
              }
              catch (Exception e)
              {
                  throw new ELException(this.alias + ": " + e.getMessage(), e.getCause());
              }
          }
      }
  
      public String toString()
      {
          return this.txt.toString();
      }
  
      public String getText()
      {
          return this.txt.toString();
      }
  
      public String getText(FaceletContext ctx)
      {
         Writer writer = new FastWriter(this.length);
         try
         {
             this.txt.apply(ctx.getExpressionFactory(), ctx).write(writer, ctx);
         }
         catch (IOException e)
         {
             throw new ELException(this.alias + ": " + e.getMessage(), e.getCause());
         }
         return writer.toString();
     }
 }