/*
    * 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.util.List;
  
  import javax.el.ELException;
  import javax.faces.FacesException;
  import javax.faces.component.UIComponent;
  import javax.faces.view.facelets.FaceletContext;
  import javax.faces.view.facelets.FaceletException;
  import javax.faces.view.facelets.FaceletHandler;
  
  public class EncodingHandler implements FaceletHandler
  {
  
      private final FaceletHandler next;
      private final String encoding;
      
      private volatile List<String> _uniqueIdList;
  
      public EncodingHandler(FaceletHandler next, String encoding)
      {
          this.next = next;
          this.encoding = encoding;
      }
  
      public void apply(FaceletContext ctx, UIComponent parent) throws IOException, FacesException, FaceletException,
              ELException
      {
          this.next.apply(ctx, parent);
          if (this.encoding == null)
          {
              if (!ctx.getFacesContext().getAttributes().containsKey("facelets.Encoding"))
              {
                  ctx.getFacesContext().getAttributes().put("facelets.Encoding", "UTF-8");
              }
          }
          else
          {
              //Encoding of document takes precedence over f:view contentType
              ctx.getFacesContext().getAttributes().put("facelets.Encoding", this.encoding);
          }
      }
  
      /**
       * @return the _uniqueIdList
       */
      public List<String> getUniqueIdList()
      {
          return _uniqueIdList;
      }
  
      /**
       * @param uniqueIdList the _uniqueIdList to set
       */
      public void setUniqueIdList(List<String> uniqueIdList)
      {
          this._uniqueIdList = uniqueIdList;
      }
  
  }