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    * 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.james.vut;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.avalon.framework.configuration.Configurable;
  import org.apache.avalon.framework.configuration.Configuration;
  import org.apache.avalon.framework.configuration.ConfigurationException;
  import org.apache.james.impl.vut.AbstractVirtualUserTable;
  import org.apache.james.impl.vut.VirtualUserTableUtil;
  
  public class XMLVirtualUserTable extends AbstractVirtualUserTable implements Configurable {
      /**
       * Holds the configured mappings
       */
      private Map mappings;
      
      private List domains;
      
      private final static String WILDCARD = "*";
      
      /**
       * @see org.apache.avalon.framework.configuration.Configurable#configure(org.apache.avalon.framework.configuration.Configuration)
       */
      public void configure(Configuration arg0) throws ConfigurationException {
          super.configure(arg0);
          Configuration[] mapConf = arg0.getChildren("mapping");
      
          mappings = new HashMap();
          domains = new ArrayList();
          
          if (mapConf != null && mapConf.length > 0) {
              for (int i = 0; i < mapConf.length; i ++) {       
                  mappings.putAll(VirtualUserTableUtil.getXMLMappings(mapConf[i].getValue()));
              }
          } else {
              throw new ConfigurationException("No mapping configured");
          }
          
          // Add domains of the mappings map to the domains List
          Iterator keys = mappings.keySet().iterator();
          
          while (keys.hasNext()) {
              String key = keys.next().toString();
  
              String[] args1 = key.split("@");
              if (args1 != null && args1.length > 1) {
                  String domain = args1[1].toLowerCase();
                  if (domains.contains(domain) == false && domain.equals(WILDCARD) == false) {
                      domains.add(domain);
                  }
              }
          }
          
          Configuration autoConf = arg0.getChild("autodetect");
          if (autoConf != null) {
              setAutoDetect(autoConf.getValueAsBoolean(true));  
          }
          
          Configuration autoIPConf = arg0.getChild("autodetectIP");
          if (autoConf != null) {
              setAutoDetectIP(autoIPConf.getValueAsBoolean(true));  
          }
      }
      
      /**
       * Not implemented
       */
      public boolean addMappingInternal(String user, String domain, String mapping) {
          // Not supported
          return false;
      }
  
      /**
      * @see org.apache.james.impl.vut.AbstractVirtualUserTable#mapAddressInternal(java.lang.String, java.lang.String)
      */
     protected String mapAddressInternal(String user, String domain) {
         if (mappings == null) {
             return null;
         } else {
             return VirtualUserTableUtil.getTargetString(user, domain, mappings);
     
         }
     }
 
     /**
      * Not implemented
      */
     public boolean removeMappingInternal(String user, String domain, String mapping) {
         // Not supported
         return false;
     }
 
     /**
      * @see org.apache.james.impl.vut.AbstractVirtualUserTable#getUserDomainMappingsInternal(java.lang.String, java.lang.String)
      */
     public Collection getUserDomainMappingsInternal(String user, String domain) {
         if (mappings == null) {
             return null;
         } else {
             String maps = (String) mappings.get(user + "@" + domain);
             if (maps != null) {
                 return VirtualUserTableUtil.mappingToCollection(maps);
             } else {
                 return null;
             }
         }
     }
 
     /**
      * @see org.apache.james.impl.vut.AbstractVirtualUserTable#getDomainsInternal()
      */
     protected List getDomainsInternal() {
         return domains;
     }
 
     /**
      * @see org.apache.james.api.domainlist.DomainList#containsDomain(java.lang.String)
      */
     public boolean containsDomain(String domain) {
         if (domains == null) {
             return false;
         } else {
             return domains.contains(domain);
         }
     }
 
     /**
      * @see org.apache.james.impl.vut.AbstractVirtualUserTable#getAllMappingsInternal()
      */
     public Map getAllMappingsInternal() {
         if ( mappings != null && mappings.size() > 0) {
             Map mappingsNew = new HashMap();
             Iterator maps = mappings.keySet().iterator();
                 
             while (maps.hasNext()) {
                 String key = maps.next().toString();
                 mappingsNew.put(key, VirtualUserTableUtil.mappingToCollection(mappings.get(key).toString()));
             }
             return mappingsNew;
         } else {
             return null;
         }
     }
 }