/*
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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 2006-2009 Sun Microsystems, Inc.
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*/
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package org.opends.server.api;
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import java.io.Serializable;
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import java.util.Comparator;
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import org.opends.server.types.ByteSequence;
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/**
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* This interface defines the set of methods that must be implemented
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* by a Directory Server module that implements a matching
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* rule used for determining the correct order of values when sorting
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* or processing range filters.
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*/
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@org.opends.server.types.PublicAPI(
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stability=org.opends.server.types.StabilityLevel.VOLATILE,
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mayInstantiate=false,
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mayExtend=true,
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mayInvoke=false)
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public interface OrderingMatchingRule
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extends MatchingRule,Comparator<byte[]>,Serializable
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{
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/**
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* Compares the first value to the second and returns a value that
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* indicates their relative order.
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*
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* @param value1 The normalized form of the first value to
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* compare.
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* @param value2 The normalized form of the second value to
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* compare.
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*
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* @return A negative integer if {@code value1} should come before
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* {@code value2} in ascending order, a positive integer if
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* {@code value1} should come after {@code value2} in
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* ascending order, or zero if there is no difference
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* between the values with regard to ordering.
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*/
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public abstract int compareValues(ByteSequence value1,
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ByteSequence value2);
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}
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