/*
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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 2009-2010 Sun Microsystems, Inc.
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* Portions Copyright 2014 ForgeRock AS
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*/
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package org.opends.server.backends.jeb;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import org.forgerock.i18n.slf4j.LocalizedLogger;
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import org.forgerock.opendj.ldap.ByteString;
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import org.forgerock.opendj.ldap.DecodeException;
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import org.opends.server.api.ExtensibleIndexer;
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import org.opends.server.types.Attribute;
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import org.opends.server.types.AttributeType;
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import org.opends.server.types.Entry;
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import org.opends.server.types.Modification;
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/**
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*This class implements an Indexer for extensible matching rules in JE Backend.
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*/
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public final class JEExtensibleIndexer extends Indexer
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{
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private static final LocalizedLogger logger = LocalizedLogger.getLoggerForThisClass();
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/**
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* The attribute type for which this instance will
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* generate index keys.
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*/
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private final AttributeType attributeType;
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/**
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* The extensible indexer which will generate the keys
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* for the associated extensible matching rule.
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*/
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private final ExtensibleIndexer extensibleIndexer;
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/**
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* Creates a new extensible indexer for JE backend.
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*
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* @param attributeType The attribute type for which an indexer is
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* required.
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* @param extensibleIndexer The extensible indexer to be used.
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*/
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public JEExtensibleIndexer(AttributeType attributeType,
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ExtensibleIndexer extensibleIndexer)
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{
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this.attributeType = attributeType;
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this.extensibleIndexer = extensibleIndexer;
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}
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/**
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* Gets a string representation of this object. The returned value is
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* used to name an index created using this object.
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* @return A string representation of this object.
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*/
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@Override
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public String toString()
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{
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return attributeType.getNameOrOID() + "."
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+ extensibleIndexer.getExtensibleIndexID();
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public void indexEntry(Entry entry, Set<ByteString> keys)
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{
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List<Attribute> attrList =
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entry.getAttribute(attributeType);
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if (attrList != null)
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{
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indexAttribute(attrList, keys);
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}
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public void replaceEntry(Entry oldEntry, Entry newEntry,
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Map<ByteString, Boolean> modifiedKeys)
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{
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List<Attribute> newAttributes = newEntry.getAttribute(attributeType, true);
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List<Attribute> oldAttributes = oldEntry.getAttribute(attributeType, true);
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indexAttribute(oldAttributes, modifiedKeys, false);
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indexAttribute(newAttributes, modifiedKeys, true);
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public void modifyEntry(Entry oldEntry, Entry newEntry,
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List<Modification> mods,
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Map<ByteString, Boolean> modifiedKeys)
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{
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List<Attribute> newAttributes = newEntry.getAttribute(attributeType, true);
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List<Attribute> oldAttributes = oldEntry.getAttribute(attributeType, true);
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indexAttribute(oldAttributes, modifiedKeys, false);
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indexAttribute(newAttributes, modifiedKeys, true);
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}
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/**
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* Generates the set of extensible index keys for an attribute.
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* @param attrList The attribute for which substring keys are required.
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* @param keys The set into which the generated keys will be inserted.
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*/
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private void indexAttribute(List<Attribute> attrList,
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Set<ByteString> keys)
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{
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if (attrList == null) return;
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for (Attribute attr : attrList)
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{
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if (!attr.isVirtual())
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{
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for (ByteString value : attr)
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{
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try
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{
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extensibleIndexer.createKeys(null, value, null, keys);
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}
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catch (DecodeException e)
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{
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logger.traceException(e);
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}
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}
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}
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}
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}
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/**
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* Generates the set of index keys for an attribute.
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* @param attrList The attribute to be indexed.
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* @param modifiedKeys The map into which the modified
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* keys will be inserted.
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* @param insert <code>true</code> if generated keys should
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* be inserted or <code>false</code> otherwise.
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*/
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private void indexAttribute(List<Attribute> attrList,
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Map<ByteString, Boolean> modifiedKeys,
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Boolean insert)
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{
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if (attrList == null) return;
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final Set<ByteString> keys = new HashSet<ByteString>();
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indexAttribute(attrList, keys);
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computeModifiedKeys(modifiedKeys, insert, keys);
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}
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/**
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* Computes a map of index keys and a boolean flag indicating whether the
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* corresponding key will be inserted or deleted.
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*
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* @param modifiedKeys
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* A map containing the keys and a boolean. Keys corresponding to the
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* boolean value <code>true</code> should be inserted and
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* <code>false</code> should be deleted.
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* @param insert
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* <code>true</code> if generated keys should be inserted or
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* <code>false</code> otherwise.
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* @param keys
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* The index keys to map.
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*/
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private static void computeModifiedKeys(Map<ByteString, Boolean> modifiedKeys,
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Boolean insert, Set<ByteString> keys)
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{
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for (ByteString key : keys)
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{
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Boolean cInsert = modifiedKeys.get(key);
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if (cInsert == null)
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{
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modifiedKeys.put(key, insert);
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}
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else if (!cInsert.equals(insert))
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{
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modifiedKeys.remove(key);
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}
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}
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}
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}
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