/*
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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 org.opends.server.protocols.asn1.ASN1OctetString;
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import org.opends.server.types.Attribute;
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import org.opends.server.types.Entry;
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import org.opends.server.types.Modification;
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import com.sleepycat.je.Transaction;
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import com.sleepycat.je.DatabaseException;
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import java.util.Comparator;
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import java.util.List;
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import java.util.Set;
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/**
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* An implementation of an Indexer for attribute presence.
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*/
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public class PresenceIndexer extends Indexer
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{
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/**
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* The fully-qualified name of this class for debugging purposes.
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*/
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private static final String CLASS_NAME =
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"org.opends.server.backends.jeb.PresenceIndexer";
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/**
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* The comparator for index keys generated by this class.
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*/
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private static final Comparator<byte[]> comparator =
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new AttributeIndex.KeyComparator();
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/**
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* The attribute index configuration for which this instance will
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* generate index keys.
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*/
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private IndexConfig indexConfig;
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/**
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* Create a new attribute presence indexer.
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* @param indexConfig The attribute index configuration for which the indexer
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* is required.
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*/
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public PresenceIndexer(IndexConfig indexConfig)
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{
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this.indexConfig = indexConfig;
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}
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/**
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* Get a string representation of this object.
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* @return A string representation of this object.
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*/
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public String toString()
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{
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return indexConfig.getAttributeType().getNameOrOID() + ".presence";
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}
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/**
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* Get the comparator that must be used to compare index keys
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* generated by this class.
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*
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* @return A byte array comparator.
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*/
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public Comparator<byte[]> getComparator()
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{
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return comparator;
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}
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/**
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* Generate the set of index keys for an entry.
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*
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* @param txn A database transaction to be used if the database need to be
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* accessed in the course of generating the index keys.
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* @param entry The entry.
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* @param keys The set into which the generated keys will be inserted.
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* @throws DatabaseException If an error occurs in the JE database.
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*/
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public void indexEntry(Transaction txn, Entry entry,
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Set<ASN1OctetString> keys) throws DatabaseException
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{
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List<Attribute> attrList =
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entry.getAttribute(indexConfig.getAttributeType());
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if (attrList != null)
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{
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if (!attrList.isEmpty())
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{
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keys.add(new ASN1OctetString(AttributeIndex.presenceKey.getData()));
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}
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}
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}
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/**
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* Generate the set of index keys to be added and the set of index keys
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* to be deleted for an entry that has been replaced.
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*
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* @param txn A database transaction to be used if the database need to be
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* accessed in the course of generating the index keys.
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* @param oldEntry The original entry contents.
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* @param newEntry The new entry contents.
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* @param addKeys The set into which the keys to be added will be inserted.
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* @param delKeys The set into which the keys to be deleted will be inserted.
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* @throws DatabaseException If an error occurs in the JE database.
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*/
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public void replaceEntry(Transaction txn, Entry oldEntry, Entry newEntry,
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Set<ASN1OctetString> addKeys,
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Set<ASN1OctetString> delKeys)
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throws DatabaseException
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{
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List<Attribute> beforeList, afterList;
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beforeList = oldEntry.getAttribute(indexConfig.getAttributeType());
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afterList = newEntry.getAttribute(indexConfig.getAttributeType());
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if (beforeList == null || beforeList.isEmpty())
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{
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if (afterList != null && !afterList.isEmpty())
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{
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addKeys.add(new ASN1OctetString(AttributeIndex.presenceKey.getData()));
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}
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}
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else if (afterList == null || afterList.isEmpty())
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{
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delKeys.add(new ASN1OctetString(AttributeIndex.presenceKey.getData()));
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}
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}
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/**
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* Generate the set of index keys to be added and the set of index keys
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* to be deleted for an entry that was modified.
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*
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* @param txn A database transaction to be used if the database need to be
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* accessed in the course of generating the index keys.
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* @param oldEntry The original entry contents.
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* @param newEntry The new entry contents.
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* @param mods The set of modifications that were applied to the entry.
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* @param addKeys The set into which the keys to be added will be inserted.
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* @param delKeys The set into which the keys to be deleted will be inserted.
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* @throws DatabaseException If an error occurs in the JE database.
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*/
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public void modifyEntry(Transaction txn, Entry oldEntry, Entry newEntry,
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List<Modification> mods,
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Set<ASN1OctetString> addKeys,
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Set<ASN1OctetString> delKeys)
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throws DatabaseException
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{
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replaceEntry(txn, oldEntry, newEntry, addKeys, delKeys);
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}
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}
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