/*
 * 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
 * information:
 *      Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 *
 *      Copyright 2006-2010 Sun Microsystems, Inc.
 *      Portions Copyright 2014 ForgeRock AS
 */
package org.opends.server.backends.jeb;

import java.util.Set;

import org.forgerock.i18n.slf4j.LocalizedLogger;
import org.forgerock.opendj.ldap.DecodeException;
import org.opends.server.api.ExtensibleIndexer;
import org.opends.server.api.OrderingMatchingRule;
import org.opends.server.types.AttributeType;
import org.opends.server.types.AttributeValue;

/**
 * An implementation of an Indexer for attribute ordering.
 */
public class OrderingIndexer extends ExtensibleIndexer
{
  private static final LocalizedLogger logger = LocalizedLogger.getLoggerForThisClass();

  /**
   * The attribute type ordering matching rule which is also the
   * comparator for the index keys generated by this class.
   */
  private OrderingMatchingRule orderingRule;


  /**
   * Create a new attribute ordering indexer for the given index configuration.
   * @param attributeType The attribute type for which an indexer is
   * required.
   */
  public OrderingIndexer(AttributeType attributeType)
  {
    this.orderingRule = attributeType.getOrderingMatchingRule();
  }

  /** {@inheritDoc} */
  @Override
  public String getIndexID()
  {
    // TODO Auto-generated method stub
    throw new RuntimeException();
  }

  /** {@inheritDoc} */
  @Override
  public String getExtensibleIndexID()
  {
    return "ordering";
  }

  /** {@inheritDoc} */
  @Override
  public void getKeys(AttributeValue value, Set<byte[]> keys)
  {
    try
    {
      keys.add(orderingRule.normalizeAttributeValue(value.getValue()).toByteArray());
    }
    catch (DecodeException e)
    {
      logger.traceException(e);
    }
  }

}