/*
* 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
* trunk/opends/resource/legal-notices/OpenDS.LICENSE
* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
* 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
* trunk/opends/resource/legal-notices/OpenDS.LICENSE. 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 2006-2009 Sun Microsystems, Inc.
*/
package org.opends.server.api;
import org.opends.server.types.*;
/**
* This class defines the set of methods and structures that must be
* implemented by a Directory Server module that implements a matching
* rule used for equality matching.
*/
@org.opends.server.types.PublicAPI(
stability=org.opends.server.types.StabilityLevel.VOLATILE,
mayInstantiate=false,
mayExtend=true,
mayInvoke=false)
public abstract class EqualityMatchingRule
extends AbstractMatchingRule
implements MatchingRule
{
/**
* Indicates whether the two provided normalized values are equal to
* each other.
*
* @param value1 The normalized form of the first value to
* compare.
* @param value2 The normalized form of the second value to
* compare.
*
* @return {@code true} if the provided values are equal, or
* {@code false} if not.
*/
public boolean areEqual(ByteSequence value1, ByteSequence value2)
{
return value1.equals(value2);
}
/**
* Indicates whether the provided attribute value should be
* considered a match for the given assertion value. This will only
* be used for the purpose of extensible matching. Other forms of
* matching against equality matching rules should use the
* {@code areEqual} method.
*
* @param attributeValue The attribute value in a form that has
* been normalized according to this
* matching rule.
* @param assertionValue The assertion value in a form that has
* been normalized according to this
* matching rule.
*
* @return {@code true} if the attribute value should be considered
* a match for the provided assertion value, or
* {@code false} if not.
*/
@Override
public ConditionResult valuesMatch(ByteSequence attributeValue,
ByteSequence assertionValue)
{
if (areEqual(attributeValue, assertionValue))
{
return ConditionResult.TRUE;
}
else
{
return ConditionResult.FALSE;
}
}
/**
* Generates a hash code for the provided attribute value. This
* version of the method will simply create a hash code from the
* normalized form of the attribute value. For matching rules
* explicitly designed to work in cases where byte-for-byte
* comparisons of normalized values is not sufficient for
* determining equality (e.g., if the associated attribute syntax is
* based on hashed or encrypted values), then this method must be
* overridden to provide an appropriate implementation for that
* case.
*
* @param attributeValue The attribute value for which to generate
* the hash code.
*
* @return The hash code generated for the provided attribute
* value.
*/
public int generateHashCode(ByteSequence attributeValue)
{
return attributeValue.hashCode();
}
}