/*
    *  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.directory.api.ldap.model.schema.normalizers;
  
  
  import org.apache.directory.api.ldap.model.constants.SchemaConstants;
  import org.apache.directory.api.ldap.model.entry.StringValue;
  import org.apache.directory.api.ldap.model.entry.Value;
  import org.apache.directory.api.ldap.model.exception.LdapException;
  import org.apache.directory.api.ldap.model.schema.Normalizer;
  import org.apache.directory.api.util.Strings;
  
  
  /**
   * A normalizer for the objectIdentifierMatch matching rule.
   * 
   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
   */
  @SuppressWarnings("serial")
  public class ObjectIdentifierNormalizer extends Normalizer
  {
      /**
       * Creates a new instance of ObjectIdentifierNormalizer.
       */
      public ObjectIdentifierNormalizer()
      {
          super( SchemaConstants.OBJECT_IDENTIFIER_MATCH_MR_OID );
      }
  
  
      /**
       * {@inheritDoc}
       */
      @Override
      public Value<?> normalize( Value<?> value ) throws LdapException
      {
          if ( value == null )
          {
              return null;
          }
  
          String str = value.getString().trim();
  
          if ( str.length() == 0 )
          {
              return new StringValue( "" );
          }
          else if ( Character.isDigit( str.charAt( 0 ) ) )
          {
              // We do this test to avoid a lowerCasing which cost time
              return new StringValue( str );
          }
          else
          {
              return new StringValue( Strings.toLowerCaseAscii( str ) );
          }
      }
  
  
      /**
       * {@inheritDoc}
       */
      @Override
      public String normalize( String value ) throws LdapException
      {
          if ( value == null )
          {
              return null;
          }
  
          String str = value.trim();
  
          if ( str.length() == 0 )
          {
              return "";
          }
          else if ( Character.isDigit( str.charAt( 0 ) ) )
          {
              // We do this test to avoid a lowerCasing which cost time
              return str;
          }
          else
         {
             return Strings.toLowerCaseAscii( str );
         }
     }
 }