/*
* 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 2009 Sun Microsystems, Inc.
*/
package org.opends.server.api;
import java.util.Map;
import java.util.Set;
import org.opends.server.types.AttributeValue;
/**
* This class is registered with a Backend and it provides call- backs
* for indexing attribute values. An index implementation will use
* this interface to create the keys for an attribute value.
*/
@org.opends.server.types.PublicAPI(
stability = org.opends.server.types.StabilityLevel.VOLATILE,
mayInstantiate = false,
mayExtend = true,
mayInvoke = false)
public abstract class ExtensibleIndexer
{
/**
* Returns the index name preferred by this indexer. This name
* appended with the identifier returned from
* {@link #getExtensibleIndexID()} will be used as the index
* database name.
*
* @return The name of the index for this indexer.
*/
public abstract String getPreferredIndexName();
/**
* Returns an index identifier associated with this indexer. An
* identifier should be selected based on the matching rule type. A
* unique identifier will map to a unique index database in the
* backend implementation. If multiple matching rules need to share
* the index database, the corresponding indexers should always use
* the same identifier.
*
* @return index ID A String containing the ID associated with this
* indexer.
*/
public abstract String getExtensibleIndexID();
/**
* Generates the set of index keys for an attribute.
*
* @param value
* The attribute value for which keys are required.
* @param keys
* The set into which the generated keys will be inserted.
*/
public abstract void getKeys(AttributeValue value,
Set<byte[]> keys);
/**
* Generates a map of index keys and a boolean flag indicating
* whether the corresponding key will be inserted or deleted.
*
* @param value
* The attribute for which keys are required.
* @param modifiedKeys
* A map containing the keys and a boolean. Keys
* corresponding to the boolean value <code>true
* </code>
* should be inserted and <code>false</code> should be
* deleted.
* @param insert
* <code>true</code> if generated keys should be inserted
* or <code>false</code> otherwise.
*/
public abstract void getKeys(AttributeValue value,
Map<byte[], Boolean> modifiedKeys, Boolean insert);
}