/**
    * This file Copyright (c) 2003-2010 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.cms.filters;
  
  import java.io.IOException;
  import java.util.Enumeration;
  import java.util.HashMap;
  import java.util.Hashtable;
  import java.util.Map;
  
  import javax.servlet.Filter;
  import javax.servlet.FilterChain;
  import javax.servlet.FilterConfig;
  import javax.servlet.ServletContext;
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  /**
   * Used to decorate a normal (not magnolia) filter.
   * @author philipp
   * @version $Id: FilterDecorator.java 36522 2010-08-18 15:43:44Z pbaerfuss $
   */
  public class FilterDecorator extends AbstractMgnlFilter {
  
      /**
       * Decorated Filter.
       */
      private Filter decoratedFilter;
  
      /**
       * Parameters passed in the config.
       */
      private Map config;
  
      /**
       * Logger.
       */
      private static Logger log = LoggerFactory.getLogger(FilterDecorator.class);
  
      public void init(FilterConfig filterConfig) throws ServletException {
          this.decoratedFilter.init(new CustomFilterConfig(filterConfig, config));
      }
  
      public void doFilter(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException{
          this.decoratedFilter.doFilter(request, response, chain);
      }
  
      public void destroy() {
          this.decoratedFilter.destroy();
      }
  
      public Map getConfig() {
          return this.config;
      }
  
      public void setConfig(Map config) {
          this.config = config;
      }
  
      public Filter getDecoratedFilter() {
          return this.decoratedFilter;
      }
  
     public void setDecoratedFilter(Filter decoratedFilter) {
         this.decoratedFilter = decoratedFilter;
     }
 
     /**
      * Exposes the parameters configured using content2bean as {@link FilterConfig} to the servlet API.
      */
     public static class CustomFilterConfig implements FilterConfig {
 
         private Map parameters;
 
         private FilterConfig parent;
 
         public CustomFilterConfig(FilterConfig parent, Map parameters) {
             super();
             this.parent = parent;
             if (parameters != null) {
                 this.parameters = parameters;
             }
             else {
                 this.parameters = new HashMap();
             }
         }
 
         public String getFilterName() {
             return parent.getFilterName();
         }
 
         public String getInitParameter(String name) {
             return (String) parameters.get(name);
         }
 
         public Enumeration getInitParameterNames() {
             return new Hashtable(parameters).keys();
         }
 
         public ServletContext getServletContext() {
             return parent.getServletContext();
         }
 
         /**
          * This is a custom method to get recursive configuration parameters like maps or list.
          */
         public Object getInitParameterObject(String name) {
             return parameters.get(name);
         }
     }
 }