/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at
 * trunk/opends/resource/legal-notices/OpenDS.LICENSE
 * or https://OpenDS.dev.java.net/OpenDS.LICENSE.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at
 * trunk/opends/resource/legal-notices/OpenDS.LICENSE.  If applicable,
 * add the following below this CDDL HEADER, with the fields enclosed
 * by brackets "[]" replaced with your own identifying information:
 *      Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 *
 *      Copyright 2009 Sun Microsystems, Inc.
 */
package org.opends.sdk.schema;



import org.opends.sdk.ByteSequence;
import org.opends.sdk.ByteString;
import org.opends.sdk.DecodeException;

import com.forgerock.opendj.util.StaticUtils;



/**
 * This class implements the userPasswordExactMatch matching rule, which will
 * simply compare encoded hashed password values to see if they are exactly
 * equal to each other.
 */
final class UserPasswordExactEqualityMatchingRuleImpl extends
    AbstractMatchingRuleImpl
{
  public ByteString normalizeAttributeValue(final Schema schema,
      final ByteSequence value) throws DecodeException
  {
    // The normalized form of this matching rule is exactly equal to the
    // non-normalized form, except that the scheme needs to be converted
    // to lowercase (if there is one).

    if (UserPasswordSyntaxImpl.isEncoded(value))
    {
      final StringBuilder builder = new StringBuilder(value.length());
      int closingBracePos = -1;
      for (int i = 1; i < value.length(); i++)
      {
        if (value.byteAt(i) == '}')
        {
          closingBracePos = i;
          break;
        }
      }
      final ByteSequence seq1 = value.subSequence(0, closingBracePos + 1);
      final ByteSequence seq2 = value.subSequence(closingBracePos + 1, value
          .length());
      StaticUtils.toLowerCase(seq1, builder);
      builder.append(seq2);
      return ByteString.valueOf(builder.toString());
    }
    else
    {
      return value.toByteString();
    }
  }
}