/**
* Copyright (c) 2010-2013 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.gis.spatial;
import java.util.Iterator;
import org.geotools.filter.AndImpl;
import org.geotools.filter.GeometryFilter;
import org.geotools.filter.LiteralExpressionImpl;
import org.geotools.filter.spatial.BBOXImpl;
import org.geotools.filter.spatial.ContainsImpl;
import org.geotools.filter.spatial.CrossesImpl;
import org.geotools.filter.spatial.EqualsImpl;
import org.geotools.filter.spatial.IntersectsImpl;
import org.geotools.filter.spatial.OverlapsImpl;
import org.geotools.filter.spatial.TouchesImpl;
import org.geotools.filter.spatial.WithinImpl;
import org.neo4j.gis.spatial.rtree.Envelope;
import org.opengis.filter.Filter;
import com.vividsolutions.jts.geom.Geometry;
public class Utilities {
public static Envelope fromJtsToNeo4j(com.vividsolutions.jts.geom.Envelope envelope) {
return new Envelope(
envelope.getMinX(),
envelope.getMaxX(),
envelope.getMinY(),
envelope.getMaxY()
);
}
public static com.vividsolutions.jts.geom.Envelope fromNeo4jToJts(Envelope envelope) {
return new com.vividsolutions.jts.geom.Envelope(
envelope.getMinX(),
envelope.getMaxX(),
envelope.getMinY(),
envelope.getMaxY()
);
}
/**
* To create an optimized index search from a Filter we try to extract an Envelope from it.
*/
public static org.neo4j.gis.spatial.rtree.Envelope extractEnvelopeFromFilter(Filter filter) {
return extractEnvelopeFromFilter(filter, true);
}
@SuppressWarnings("rawtypes")
private static org.neo4j.gis.spatial.rtree.Envelope extractEnvelopeFromFilter(Filter filter, boolean inspectAndFilters) {
if (filter instanceof BBOXImpl) {
return extractEnvelopeFromBBox((BBOXImpl) filter);
} else if (filter instanceof IntersectsImpl ||
filter instanceof ContainsImpl ||
filter instanceof CrossesImpl ||
filter instanceof EqualsImpl ||
filter instanceof OverlapsImpl ||
filter instanceof TouchesImpl ||
filter instanceof WithinImpl) {
return extractEnvelopeFromGeometryFilter((GeometryFilter) filter);
} else if (filter instanceof AndImpl && inspectAndFilters) {
AndImpl andFilter = (AndImpl) filter;
Iterator children = andFilter.getFilterIterator();
while (children.hasNext()) {
Filter child = (Filter) children.next();
Envelope result = extractEnvelopeFromFilter(child, false);
if (result != null) {
return result;
}
}
}
return null;
}
@SuppressWarnings("deprecation")
private static Envelope extractEnvelopeFromGeometryFilter(GeometryFilter intersectFilter) {
if (intersectFilter.getLeftGeometry() instanceof LiteralExpressionImpl) {
return extractEnvelopeFromLiteralExpression((LiteralExpressionImpl) intersectFilter.getLeftGeometry());
} else if (intersectFilter.getRightGeometry() instanceof LiteralExpressionImpl) {
return extractEnvelopeFromLiteralExpression((LiteralExpressionImpl) intersectFilter.getRightGeometry());
}
return null;
}
private static Envelope extractEnvelopeFromLiteralExpression(LiteralExpressionImpl exp) {
if (exp.getValue() instanceof Geometry) {
return fromJtsToNeo4j(((Geometry) exp.getValue()).getEnvelopeInternal());
} else {
return null;
}
}
private static Envelope extractEnvelopeFromBBox(BBOXImpl bbox) {
return new Envelope(bbox.getMinX(), bbox.getMaxX(), bbox.getMinY(), bbox.getMaxY());
}
}