package org.apache.archiva.redback.common.ldap;
   
   /*
    * 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.
   */
  
  import javax.naming.NamingEnumeration;
  import javax.naming.NamingException;
  import javax.naming.directory.Attribute;
  import javax.naming.directory.Attributes;
  
  /**
   * 
   *
   */
  public final class LdapUtils
  {
      private LdapUtils()
      {
          // no op
      }
  
      @SuppressWarnings("unchecked")
      public static String getLabeledUriValue( Attributes attributes, String attrName, String label,
                                               String attributeDescription )
          throws MappingException
      {
          if ( attrName == null )
          {
              return null;
          }
  
          Attribute attribute = attributes.get( attrName );
          if ( attribute != null )
          {
              NamingEnumeration attrs;
              try
              {
                  attrs = attribute.getAll();
              }
              catch ( NamingException e )
              {
                  throw new MappingException(
                      "Failed to retrieve " + attributeDescription + " (attribute: \'" + attrName + "\').", e );
              }
  
              while ( attrs.hasMoreElements() )
              {
                  Object value = attrs.nextElement();
  
                  String val = String.valueOf( value );
  
                  if ( val.endsWith( " " + label ) )
                  {
                      return val.substring( 0, val.length() - ( label.length() + 1 ) );
                  }
              }
          }
  
          return null;
      }
  
      public static String getAttributeValue( Attributes attributes, String attrName, String attributeDescription )
          throws MappingException
      {
          if ( attrName == null )
          {
              return null;
          }
  
          Attribute attribute = attributes.get( attrName );
          if ( attribute != null )
          {
              try
              {
                  Object value = attribute.get();
  
                  return String.valueOf( value );
              }
              catch ( NamingException e )
              {
                  throw new MappingException(
                      "Failed to retrieve " + attributeDescription + " (attribute: \'" + attrName + "\').", e );
              }
         }
 
         return null;
     }
 
     public static String getAttributeValueFromByteArray( Attributes attributes, String attrName,
                                                          String attributeDescription )
         throws MappingException
     {
         if ( attrName == null )
         {
             return null;
         }
 
         Attribute attribute = attributes.get( attrName );
         if ( attribute != null )
         {
             try
             {
                 byte[] value = (byte[]) attribute.get();
 
                 return new String( value );
             }
             catch ( NamingException e )
             {
                 throw new MappingException(
                     "Failed to retrieve " + attributeDescription + " (attribute: \'" + attrName + "\').", e );
             }
         }
 
         return null;
     }
 }