/*
    * 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.commons.resourcehandler.webapp.config;
  
  import javax.faces.context.FacesContext;
  
  import org.apache.myfaces.commons.resourcehandler.webapp.config.impl.WebConfigProviderImpl;
  
  /**
   * 
   * @author Leonardo Uribe
   *
   */
  public abstract class WebConfigProviderFactory
  {
      protected static final String FACTORY_DEFAULT = WebConfigProviderFactory.class.getName();
  
      private static final String FACTORY_KEY = WebConfigProviderFactory.class.getName();
  
      public static WebConfigProviderFactory getFacesConfigResourceProviderFactory(FacesContext ctx)
      {
          WebConfigProviderFactory instance = (WebConfigProviderFactory) ctx.getExternalContext().getApplicationMap().get(FACTORY_KEY);
          if (instance != null)
          {
              return instance;
          }
          else
          {
              WebConfigProviderFactory wcpf = new WebConfigProviderFactory()
              {
                  @Override
                  public WebConfigProvider createWebConfigProvider(FacesContext facesContext)
                  {
                      return new WebConfigProviderImpl();
                  }
              };
              setWebConfigProviderFactory(ctx, wcpf);
              return wcpf;
          }
      }
  
      public static void setWebConfigProviderFactory(FacesContext ctx, WebConfigProviderFactory instance)
      {
          ctx.getExternalContext().getApplicationMap().put(FACTORY_KEY, instance);
      }
  
      public abstract WebConfigProvider createWebConfigProvider(FacesContext facesContext);
  }