/*
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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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* Copyright 2009 Sun Microsystems, Inc.
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*/
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package org.opends.server.backends.jeb;
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import com.sleepycat.je.DatabaseEntry;
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import com.sleepycat.je.LockMode;
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import java.util.Collection;
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import java.util.Map;
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import org.opends.server.api.IndexQueryFactory;
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import org.opends.server.types.ByteSequence;
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/**
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* This class is an implementation of IndexQueryFactory which creates
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* IndexQuery objects as part of the query of the JEB index.
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*/
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public final class IndexQueryFactoryImpl implements
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IndexQueryFactory<IndexQuery>
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{
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/**
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* The Map containing the string type identifier and the corresponding
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* index.
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*/
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private Map<String, Index> indexMap;
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/**
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* Creates a new IndexQueryFactoryImpl object.
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*
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* @param indexMap
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* A map containing the index id and the corresponding index.
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*/
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public IndexQueryFactoryImpl(Map<String, Index> indexMap)
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{
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this.indexMap = indexMap;
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}
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/**
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* {@inheritDoc}
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*/
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public IndexQuery createExactMatchQuery(final String indexID,
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final ByteSequence value)
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{
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return new IndexQuery()
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{
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@Override
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public EntryIDSet evaluate()
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{
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// Read the database and get Record for the key.
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DatabaseEntry key = new DatabaseEntry(value.toByteArray());
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// Select the right index to be used.
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Index index = indexMap.get(indexID);
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EntryIDSet entrySet =
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index.readKey(key, null, LockMode.DEFAULT);
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return entrySet;
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}
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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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public IndexQuery createRangeMatchQuery(final String indexID,
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final ByteSequence lowerBound, final ByteSequence upperBound,
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final boolean includeLowerBound, final boolean includeUpperBound)
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{
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return new IndexQuery()
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{
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@Override
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public EntryIDSet evaluate()
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{
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// Find the right index.
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Index index = indexMap.get(indexID);
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EntryIDSet entrySet =
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index.readRange(lowerBound.toByteArray(), upperBound
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.toByteArray(), includeLowerBound, includeUpperBound);
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return entrySet;
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}
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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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public IndexQuery createIntersectionQuery(
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Collection<IndexQuery> subqueries)
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{
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return IndexQuery.createIntersectionIndexQuery(subqueries);
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}
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/**
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* {@inheritDoc}
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*/
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public IndexQuery createUnionQuery(Collection<IndexQuery> subqueries)
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{
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return IndexQuery.createUnionIndexQuery(subqueries);
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}
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/**
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* {@inheritDoc}
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* <p>
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* It returns an empty EntryIDSet object when either all or no record
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* sets are requested.
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*/
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public IndexQuery createMatchAllQuery()
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{
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return new IndexQuery()
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{
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@Override
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public EntryIDSet evaluate()
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{
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return new EntryIDSet();
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}
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};
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}
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}
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