/*
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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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* Portions Copyright 2006 Sun Microsystems, Inc.
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*/
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package org.opends.server.backends.jeb;
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import java.util.Comparator;
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/**
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* A comparator for index modifications.
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*/
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public class IndexModComparator implements Comparator<IndexMod>
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{
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/**
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* The index key comparator.
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*/
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private Comparator<byte[]> comparator;
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/**
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* Indicates when true that the entry ID should also factor into the
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* comparison, in addition to the index key.
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*/
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private boolean compareID;
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/**
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* Create a new comparator for index modifications.
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* @param comparator The index key comparator.
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* @param compareID Indicates when true that the entry ID should also factor
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* into the comparison, in addition to the index key.
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*/
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public IndexModComparator(Comparator<byte[]> comparator, boolean compareID)
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{
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this.comparator = comparator;
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this.compareID = compareID;
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}
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/**
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* Compares its two arguments for order. Returns a negative integer,
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* zero, or a positive integer as the first argument is less than, equal
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* to, or greater than the second.
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*
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* @param a the first object to be compared.
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* @param b the second object to be compared.
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* @return a negative integer, zero, or a positive integer as the
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* first argument is less than, equal to, or greater than the
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* second.
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*/
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public int compare(IndexMod a, IndexMod b)
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{
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int r = comparator.compare(a.key, b.key);
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if (compareID)
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{
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if (r == 0)
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{
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r = a.value.compareTo(b.value);
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}
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}
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return r;
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}
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}
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