/*
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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 legal-notices/CDDLv1_0.txt
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* or http://forgerock.org/license/CDDLv1.0.html.
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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 legal-notices/CDDLv1_0.txt.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* 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 org.opends.server.types.*;
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/**
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* This class defines the set of methods and structures that must be
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* implemented by a Directory Server module that implements a matching
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* rule used for equality matching.
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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 abstract class EqualityMatchingRule
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extends AbstractMatchingRule
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implements MatchingRule
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{
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/**
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* Indicates whether the two provided normalized values are equal to
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* each other.
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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 {@code true} if the provided values are equal, or
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* {@code false} if not.
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*/
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public boolean areEqual(ByteSequence value1, ByteSequence value2)
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{
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return value1.equals(value2);
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}
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/**
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* Indicates whether the provided attribute value should be
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* considered a match for the given assertion value. This will only
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* be used for the purpose of extensible matching. Other forms of
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* matching against equality matching rules should use the
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* {@code areEqual} method.
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*
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* @param attributeValue The attribute value in a form that has
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* been normalized according to this
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* matching rule.
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* @param assertionValue The assertion value in a form that has
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* been normalized according to this
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* matching rule.
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*
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* @return {@code true} if the attribute value should be considered
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* a match for the provided assertion value, or
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* {@code false} if not.
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*/
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@Override
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public ConditionResult valuesMatch(ByteSequence attributeValue,
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ByteSequence assertionValue)
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{
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if (areEqual(attributeValue, assertionValue))
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{
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return ConditionResult.TRUE;
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}
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else
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{
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return ConditionResult.FALSE;
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}
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}
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/**
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* Generates a hash code for the provided attribute value. This
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* version of the method will simply create a hash code from the
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* normalized form of the attribute value. For matching rules
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* explicitly designed to work in cases where byte-for-byte
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* comparisons of normalized values is not sufficient for
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* determining equality (e.g., if the associated attribute syntax is
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* based on hashed or encrypted values), then this method must be
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* overridden to provide an appropriate implementation for that
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* case.
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*
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* @param attributeValue The attribute value for which to generate
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* the hash code.
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*
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* @return The hash code generated for the provided attribute
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* value.
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*/
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public int generateHashCode(ByteSequence attributeValue)
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{
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return attributeValue.hashCode();
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}
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}
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