/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* JBoss, Home of Professional Open Source
* Copyright 2011 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.hibernate.search.spatial.impl;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.FilteredQuery;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.search.NumericRangeQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.QueryWrapperFilter;
import org.hibernate.search.spatial.SpatialFieldBridgeByQuadTree;
import java.util.List;
/**
* The SpatialQueryBuilder holds builder methods for Quad Tree, Distance and Spatial (Quad Tree+Distance) filters
* and queries
*
* @author Nicolas Helleringer <nicolas.helleringer@novacodex.net>
*/
public abstract class SpatialQueryBuilderFromPoint {
/**
* Returns a Lucene filter which rely on Hibernate Search Spatial
* quad tree indexation to filter document at radius
*
* @param center center of the search discus
* @param radius distance max to center in km
* @param fieldName name of the Lucene Field implementing Coordinates
* @return Lucene filter to be used in a Query
* @see org.apache.lucene.search.Query
* @see org.hibernate.search.spatial.Coordinates
* @see org.apache.lucene.search.Filter
*/
public static Filter buildQuadTreeFilter(Point center, double radius, String fieldName) {
int bestQuadTreeLevel = SpatialHelper.findBestQuadTreeLevelForSearchRange( 2.0d * radius );
if ( bestQuadTreeLevel > SpatialFieldBridgeByQuadTree.DEFAULT_BOTTOM_QUAD_TREE_LEVEL ) {
bestQuadTreeLevel = SpatialFieldBridgeByQuadTree.DEFAULT_BOTTOM_QUAD_TREE_LEVEL;
}
List<String> quadTreeCellsIds = SpatialHelper.getQuadTreeCellsIds( center, radius, bestQuadTreeLevel );
return new QuadTreeFilter( quadTreeCellsIds, SpatialHelper.formatFieldName( bestQuadTreeLevel, fieldName ) );
}
/**
* Returns a Lucene filter to fine filter document by distance
*
* @param center center of the search discus
* @param radius distance max to center in km
* @param coordinatesField name of the Lucene Field implementing Coordinates
* @return Lucene filter to be used in a Query
* @param previousFilter preceding filter in filter chain
* Warning if passed null DistanceFilter constructor use a
* filter wrapped match all query (time/resource consuming !)
* @see org.apache.lucene.search.Query
* @see org.hibernate.search.spatial.Coordinates
* @see DistanceFilter
* @see Filter
*/
public static Filter buildDistanceFilter(Filter previousFilter, Point center, double radius, String coordinatesField) {
return new DistanceFilter( previousFilter, center, radius, coordinatesField );
}
/**
* Returns a Lucene filter to fine filter document by distance
*
* @param center center of the search discus
* @param radius distance max to center in km
* @param latitudeField name of the Lucene Field hosting latitude
* @param longitudeField name of the Lucene Field hosting longitude
* @return Lucene filter to be used in a Query
* @param previousFilter preceding filter in filter chain
* Warning if passed null DistanceFilter constructor use a
* filter wrapped match all query (time/ressource consuming !)
* @see org.apache.lucene.search.Query
* @see org.hibernate.search.spatial.Coordinates
* @see DistanceFilter
* @see Filter
*/
public static Filter buildDistanceFilter(Filter previousFilter, Point center, double radius, String latitudeField, String longitudeField) {
return new DistanceFilter( previousFilter, center, radius, latitudeField, longitudeField );
}
/**
* Returns a Lucene Query which rely on Hibernate Search Spatial
* quad tree indexation to filter document at radius by wrapping a
* QuadTreeFilter
*
* @param center center of the search discus
* @param radius distance max to center in km
* @param fieldName name of the Lucene Field implementing Coordinates
* @return Lucene Query to be used in a search
* @see org.apache.lucene.search.Query
* @see org.hibernate.search.spatial.Coordinates
*/
public static Query buildQuadTreeQuery(Point center, double radius, String fieldName) {
return new FilteredQuery( new MatchAllDocsQuery( ), buildQuadTreeFilter(center, radius, fieldName) );
}
/**
* Returns a Lucene Query searching directly by computing distance against
* all docs in the index (costly !)
*
* @param center center of the search discus
* @param radius distance max to center in km
* @param fieldName name of the Lucene Field implementing Coordinates
* @return Lucene Query to be used in a search
* @see Query
* @see org.hibernate.search.spatial.Coordinates
*/
public static Query buildDistanceQuery(Point center, double radius, String fieldName) {
Filter allFilter = new QueryWrapperFilter( new MatchAllDocsQuery() );
return new FilteredQuery( new MatchAllDocsQuery( ), buildDistanceFilter( allFilter, center, radius, fieldName ) );
}
/**
* Returns a Lucene Query which relies on Hibernate Search Spatial
* quad tree indexation to filter documents at radius and filter its results
* by a fine DistanceFilter
*
* @param center center of the search discus
* @param radius distance max to center in km
* @param fieldName name of the Lucene Field implementing Coordinates
* @return Lucene Query to be used in a search
* @see Query
* @see org.hibernate.search.spatial.Coordinates
*/
public static Query buildSpatialQueryByQuadTree(Point center, double radius, String fieldName) {
return new FilteredQuery( new MatchAllDocsQuery( ),
buildDistanceFilter(
buildQuadTreeFilter( center, radius, fieldName ),
center,
radius,
fieldName
)
);
}
/**
* Returns a Lucene Query which rely on double numeric range query
* on Latitude / Longitude
*
* @param center center of the search discus
* @param radius distance max to center in km
* @param fieldName name of the Lucene Field implementing Coordinates
* @return Lucene Query to be used in a search
* @see Query
* @see org.hibernate.search.spatial.Coordinates
*/
public static Query buildSpatialQueryByRange(Point center, double radius, String fieldName) {
Rectangle boundingBox = Rectangle.fromBoundingCircle( center, radius );
String latitudeFieldName = fieldName + "_HSSI_Latitude";
String longitudeFieldName = fieldName + "_HSSI_Longitude";
Query latQuery= NumericRangeQuery.newDoubleRange(
latitudeFieldName, boundingBox.getLowerLeft().getLatitude(),
boundingBox.getUpperRight().getLatitude(), true, true
);
Query longQuery= null;
if ( boundingBox.getLowerLeft().getLongitude() <= boundingBox.getUpperRight().getLongitude() ) {
longQuery = NumericRangeQuery.newDoubleRange( longitudeFieldName, boundingBox.getLowerLeft().getLongitude(),
boundingBox.getUpperRight().getLongitude(), true, true );
}
else {
longQuery= new BooleanQuery();
( (BooleanQuery) longQuery).add( NumericRangeQuery.newDoubleRange( longitudeFieldName, boundingBox.getLowerLeft().getLongitude(),
180.0, true, true ), BooleanClause.Occur.SHOULD );
( (BooleanQuery) longQuery).add( NumericRangeQuery.newDoubleRange( longitudeFieldName, -180.0,
boundingBox.getUpperRight().getLongitude(), true, true ), BooleanClause.Occur.SHOULD );
}
BooleanQuery boxQuery = new BooleanQuery();
boxQuery.add( latQuery, BooleanClause.Occur.MUST );
boxQuery.add( longQuery, BooleanClause.Occur.MUST );
return new FilteredQuery(
new MatchAllDocsQuery(),
buildDistanceFilter(
new QueryWrapperFilter( boxQuery ),
center,
radius,
latitudeFieldName,
longitudeFieldName
)
);
}
}