/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library 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
* Lesser General Public License for more details.
*/
package org.geotools.data.h2;
import java.io.IOException;
import org.geotools.data.jdbc.FilterToSQL;
import org.geotools.filter.FilterCapabilities;
import org.opengis.filter.expression.Literal;
import org.opengis.filter.expression.PropertyName;
import org.opengis.filter.spatial.BBOX;
import org.opengis.filter.spatial.Beyond;
import org.opengis.filter.spatial.BinarySpatialOperator;
import org.opengis.filter.spatial.Contains;
import org.opengis.filter.spatial.Crosses;
import org.opengis.filter.spatial.DWithin;
import org.opengis.filter.spatial.Disjoint;
import org.opengis.filter.spatial.DistanceBufferOperator;
import org.opengis.filter.spatial.Equals;
import org.opengis.filter.spatial.Intersects;
import org.opengis.filter.spatial.Overlaps;
import org.opengis.filter.spatial.Touches;
import org.opengis.filter.spatial.Within;
import com.vividsolutions.jts.geom.Envelope;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.LinearRing;
public class H2FilterToSQL extends FilterToSQL {
@Override
protected FilterCapabilities createFilterCapabilities() {
FilterCapabilities caps = super.createFilterCapabilities();
caps.addType(BBOX.class);
caps.addType(Contains.class);
caps.addType(Crosses.class);
caps.addType(Disjoint.class);
caps.addType(Equals.class);
caps.addType(Intersects.class);
caps.addType(Overlaps.class);
caps.addType(Touches.class);
caps.addType(Within.class);
caps.addType(DWithin.class);
caps.addType(Beyond.class);
return caps;
}
@Override
protected void visitLiteralGeometry(Literal expression) throws IOException {
Geometry g = (Geometry) evaluateLiteral(expression, Geometry.class);
if (g instanceof LinearRing) {
//WKT does not support linear rings
g = g.getFactory().createLineString(((LinearRing) g).getCoordinateSequence());
}
out.write( "ST_GeomFromText('"+g.toText()+"', "+currentSRID+")");
}
@Override
protected Object visitBinarySpatialOperator(BinarySpatialOperator filter,
PropertyName property, Literal geometry, boolean swapped, Object extraData) {
try {
if (filter instanceof DistanceBufferOperator) {
out.write("ST_Distance(");
property.accept(this, extraData);
out.write(", ");
geometry.accept(this, extraData);
out.write(")");
if (filter instanceof DWithin) {
out.write("<");
}
else if (filter instanceof Beyond) {
out.write(">");
}
else {
throw new RuntimeException("Unknown distance operator");
}
out.write(Double.toString(((DistanceBufferOperator)filter).getDistance()));
}
else if (filter instanceof BBOX) {
//TODO: make a loose bounding box parameter
out.write("ST_Intersects(");
property.accept(this, extraData);
out.write(",");
geometry.accept(this, extraData);
out.write(")");
}
else {
if (filter instanceof Contains) {
out.write("ST_Contains(");
}
else if (filter instanceof Crosses) {
out.write("ST_Crosses(");
}
else if (filter instanceof Disjoint) {
out.write("ST_Disjoint(");
}
else if (filter instanceof Equals) {
out.write("ST_Equals(");
}
else if (filter instanceof Intersects) {
out.write("ST_Intersects(");
}
else if (filter instanceof Overlaps) {
out.write("ST_Overlaps(");
}
else if (filter instanceof Touches) {
out.write("ST_Touches(");
}
else if (filter instanceof Within) {
out.write("ST_Within(");
}
else {
throw new RuntimeException("Unknown operator: " + filter);
}
if (swapped) {
geometry.accept(this, extraData);
out.write(", ");
property.accept(this, extraData);
}
else {
property.accept(this, extraData);
out.write(", ");
geometry.accept(this, extraData);
}
out.write(")");
}
if (!(filter instanceof Disjoint)) {
String spatialIndex = (String)
currentGeometry.getUserData().get(H2Dialect.H2_SPATIAL_INDEX);
if (spatialIndex != null) {
//property map the column type
if (primaryKey.getColumns().size() == 1 &&
Number.class.isAssignableFrom(primaryKey.getColumns().get(0).getType())) {
Envelope e = geometry.evaluate(null, Envelope.class);
out.write( " AND ");
out.write("\"" + primaryKey.getColumns().get(0).getName() + "\" ");
out.write( "IN (");
out.write("SELECT CAST(HATBOX_JOIN_ID AS INT)");
out.write(" FROM HATBOX_MBR_INTERSECTS_ENV(");
if (databaseSchema != null ) {
out.write("'"+databaseSchema+"', ");
}
else {
out.write("'PUBLIC', ");
}
out.write("'"+featureType.getTypeName()+"', ");
out.write(e.getMinX()+", "+e.getMaxX()+", "+e.getMinY()+", "+e.getMaxY());
out.write(")");
out.write(")");
}
}
}
}
catch (IOException e) {
throw new RuntimeException(e);
}
return extraData;
}
}