server/schema/OctetStringSubstringMatchingRule.java

/*
 * 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 legal-notices/CDDLv1_0.txt
 * or http://forgerock.org/license/CDDLv1.0.html.
 * 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 legal-notices/CDDLv1_0.txt.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
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 *      Portions Copyright [yyyy] [name of copyright owner]
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 *
 *
 *      Copyright 2006-2009 Sun Microsystems, Inc.
 */
package org.opends.server.schema;


import static org.opends.server.schema.SchemaConstants.*;

import java.util.Collection;
import java.util.Collections;

import org.opends.server.api.SubstringMatchingRule;
import org.opends.server.types.ByteSequence;
import org.opends.server.types.ByteString;
import org.opends.server.types.DirectoryException;


/**
 * This class defines the octetStringSubstringsMatch matching rule defined in
 * X.520.  It will be used as the default substring matching rule for the binary
 * and octet string syntaxes.
 */
class OctetStringSubstringMatchingRule
       extends SubstringMatchingRule
{
  /**
   * Creates a new instance of this octetStringSubstringsMatch matching rule.
   */
  public OctetStringSubstringMatchingRule()
  {
    super();
  }


  /**
   * {@inheritDoc}
   */
  @Override
  public Collection<String> getAllNames()
  {
    return Collections.singleton(getName());
  }


  /**
   * Retrieves the common name for this matching rule.
   *
   * @return  The common name for this matching rule, or <CODE>null</CODE> if
   * it does not have a name.
   */
  @Override
  public String getName()
  {
    return SMR_OCTET_STRING_NAME;
  }


  /**
   * Retrieves the OID for this matching rule.
   *
   * @return  The OID for this matching rule.
   */
  @Override
  public String getOID()
  {
    return SMR_OCTET_STRING_OID;
  }


  /**
   * Retrieves the description for this matching rule.
   *
   * @return  The description for this matching rule, or <CODE>null</CODE> if
   *          there is none.
   */
  @Override
  public String getDescription()
  {
    // There is no standard description for this matching rule.
    return null;
  }


  /**
   * Retrieves the OID of the syntax with which this matching rule is
   * associated.
   *
   * @return  The OID of the syntax with which this matching rule is associated.
   */
  @Override
  public String getSyntaxOID()
  {
    return SYNTAX_SUBSTRING_ASSERTION_OID;
  }


  /**
   * Retrieves the normalized form of the provided value, which is best suited
   * for efficiently performing matching operations on that value.
   *
   * @param  value  The value to be normalized.
   *
   * @return  The normalized version of the provided value.
   *
   * @throws  DirectoryException  If the provided value is invalid according to
   *                              the associated attribute syntax.
   */
  @Override
  public ByteString normalizeValue(ByteSequence value)
         throws DirectoryException
  {
    return value.toByteString();
  }


  /**
   * Normalizes the provided value fragment into a form that can be used to
   * efficiently compare values.
   *
   * @param  substring  The value fragment to be normalized.
   *
   * @return  The normalized form of the value fragment.
   *
   * @throws  DirectoryException  If the provided value fragment is not
   *                              acceptable according to the associated syntax.
   */
  @Override
  public ByteString normalizeSubstring(ByteSequence substring)
         throws DirectoryException
  {
    // This is exactly the same as normalizing a full value.
    return substring.toByteString();
  }
}