/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2006-2010 Sun Microsystems, Inc.
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* Portions copyright 2012-2013 ForgeRock AS.
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*/
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package org.opends.server.replication.plugin;
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import static org.opends.messages.ReplicationMessages.*;
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import static org.opends.server.util.StaticUtils.hexStringToByteArray;
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import java.util.Collection;
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import java.util.Collections;
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import org.opends.server.api.AbstractMatchingRule;
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import org.opends.server.api.OrderingMatchingRule;
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import org.opends.server.types.*;
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/**
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* Used to establish an order between historical information and index them.
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*/
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public class HistoricalCsnOrderingMatchingRule
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extends AbstractMatchingRule
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implements OrderingMatchingRule
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{
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/**
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* The serial version identifier required to satisfy the compiler because this
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* class implements the <CODE>java.io.Serializable</CODE> interface. This
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* value was generated using the <CODE>serialver</CODE> command-line utility
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* included with the Java SDK.
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*/
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private static final long serialVersionUID = -3424403930225609943L;
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/**
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* Construct a new HistoricalCsnOrderingMatchingRule object.
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*
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*/
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public HistoricalCsnOrderingMatchingRule()
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{
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super();
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}
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/**
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* Compare two ByteString values containing historical information.
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* @param value1 first value to compare
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* @param value2 second value to compare
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* @return 0 when equals, -1 or 1 to establish order
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*/
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public int compareValues(ByteSequence value1, ByteSequence value2)
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{
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return value1.compareTo(value2);
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}
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/**
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* {@inheritDoc}
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*/
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public Collection<String> getAllNames()
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{
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return Collections.singleton(getName());
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}
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/**
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* Get the name of this class.
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* @return name of the class in String form
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*/
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@Override
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public String getName()
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{
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return "historicalCsnOrderingMatch";
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}
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/**
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* Get the OID of the class.
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* @return the OID of the class in String form.
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*/
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@Override
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public String getOID()
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{
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return "1.3.6.1.4.1.26027.1.4.4";
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}
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/**
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* Get the description of this Class.
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* @return the Class description in String form, currently not used.
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*/
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@Override
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public String getDescription()
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{
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return null;
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}
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/**
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* Get the Syntax OID for this class.
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* @return the syntax OID in String form
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*/
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@Override
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public String getSyntaxOID()
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{
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return "1.3.6.1.4.1.1466.115.121.1.40";
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public ByteString normalizeValue(ByteSequence value)
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throws DirectoryException
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{
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/*
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* Change the format of the value to index and start with the serverId. In
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* that manner, the search response time is optimised for a particular
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* serverId. The format of the key is now : serverId + timestamp + seqNum
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*/
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try
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{
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int csnIndex = value.toString().indexOf(':') + 1;
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String csn = value.subSequence(csnIndex, csnIndex + 28).toString();
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ByteStringBuilder builder = new ByteStringBuilder(14);
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builder.append(hexStringToByteArray(csn.substring(16, 20)));
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builder.append(hexStringToByteArray(csn.substring(0, 16)));
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builder.append(hexStringToByteArray(csn.substring(20, 28)));
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return builder.toByteString();
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}
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catch (Exception e)
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{
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// This should never occur in practice since these attributes are managed
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// internally.
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throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX,
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WARN_INVALID_SYNC_HIST_VALUE.get(String.valueOf(value)), e);
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}
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}
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/**
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* {@inheritDoc}
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*/
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public int compare(byte[] b1, byte[] b2)
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{
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/*
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* See OPENDJ-992: do not use StaticUtils.compare() because it performs
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* unsigned comparisons whereas the 2.4 implementation (below) performs
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* signed comparisons. Changes to indexing comparators require that the
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* index be rebuilt, otherwise the DB can fail unexpectedly.
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*/
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int minLength = Math.min(b1.length, b2.length);
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for (int i = 0; i < minLength; i++)
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{
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if (b1[i] == b2[i])
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{
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continue;
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}
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else if (b1[i] < b2[i])
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{
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return -1;
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}
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else if (b1[i] > b2[i])
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{
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return 1;
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}
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}
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if (b1.length == b2.length)
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{
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return 0;
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}
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else if (b1.length < b2.length)
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{
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return -1;
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}
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else
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{
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return 1;
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}
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}
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}
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