/*
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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.api;
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import java.util.Collection;
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/**
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* This class acts as a factory for creating index queries. This
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* interface is implemented by the underlying backend implementation
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* and passed to extensible matching rules so that they can construct
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* arbitrarily complex index queries.
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*
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* @param <T> The type of Results returned by the factory.
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*/
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@org.opends.server.types.PublicAPI(
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stability=org.opends.server.types.StabilityLevel.VOLATILE,
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mayInstantiate=false,
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mayExtend=true,
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mayInvoke=false)
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public interface IndexQueryFactory<T>
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{
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/**
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* Returns a query requesting an index record matching the
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* provided key.
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* @param indexID An identifier of the index type.
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* @param key A byte array containing the key.
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* @return A query requesting the index record matching the key.
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*/
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T createExactMatchQuery(String indexID,byte[] key);
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/**
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* Returns a query requesting all index records. A backend
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* implementation may choose to return all or no records as
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* part of the optimization.
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* @return A query requesting all index records.
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*/
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T createMatchAllQuery();
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/**
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* Rreturns a query requesting all index records in the specified
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* range.
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* @param indexID An identifier of the index type.
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* @param lower The lower bound of the range. A 0 length byte
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* array indicates no lower bound and the
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* range will start from the smallest key.
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* @param upper The upper bound of the range. A 0 length byte array
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* indicates no upper bound and the range will
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* end at the largest key.
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* @param lowerIncluded true if a key exactly matching the lower
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* bound is included in the range, false if
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* only keys strictly greater than the lower
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* bound are included.This value is ignored if
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* the lower bound is not specified.
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* @param upperIncluded true if a key exactly matching the upper
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* bound is included in the range, false if
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* only keys strictly less than the upper
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* bound are included. This value is ignored if
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* the upper bound is not specified.
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* @return A query requesting all index records in the specified
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* range.
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*/
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T createRangeMatchQuery(
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String indexID,
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byte[] lower,
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byte[] upper,
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boolean lowerIncluded,
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boolean upperIncluded);
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/**
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* Returns a query requesting intersection from a Collection of
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* sub-queries.
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*@param subquery A Collection of sub-queries.
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*@return A query requesting intersection of the records.
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*/
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T createIntersectionQuery(Collection<T> subquery);
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/**
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* Returns a query requesting union from a Collection of
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* sub-queries.
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* @param subquery A Collection of sub-queries.
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* @return A query requesting union of the records.
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*/
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T createUnionQuery(Collection<T> subquery);
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}
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