/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2009, 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.sqlserver;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.geotools.data.jdbc.FilterToSQL;
import org.geotools.filter.FilterCapabilities;
import org.geotools.jdbc.SQLDialect;
import org.opengis.filter.expression.Expression;
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.Geometry;
import com.vividsolutions.jts.geom.LinearRing;
/**
*
*
* @source $URL$
*/
public class SQLServerFilterToSQL extends FilterToSQL {
@Override
protected FilterCapabilities createFilterCapabilities() {
FilterCapabilities caps = super.createFilterCapabilities();
caps.addAll(SQLDialect.BASE_DBMS_CAPABILITIES);
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( "geometry::STGeomFromText('"+g.toText()+"', "+currentSRID+")");
}
@Override
protected Object visitBinarySpatialOperator(BinarySpatialOperator filter,
PropertyName property, Literal geometry, boolean swapped, Object extraData) {
return visitBinarySpatialOperator(filter, (Expression)property, (Expression)geometry,
swapped, extraData);
}
@Override
protected Object visitBinarySpatialOperator(BinarySpatialOperator filter, Expression e1,
Expression e2, Object extraData) {
return visitBinarySpatialOperator(filter, e1, e2, false, extraData);
}
protected Object visitBinarySpatialOperator(BinarySpatialOperator filter, Expression e1,
Expression e2, boolean swapped, Object extraData) {
try {
//if the filter is not disjoint, and it with a BBOX filter
if (!(filter instanceof Disjoint) && !(filter instanceof DistanceBufferOperator)) {
e1.accept(this, extraData);
out.write( ".Filter(");
e2.accept(this, extraData);
out.write(") = 1");
if (!(filter instanceof BBOX)) {
out.write( " AND " );
}
}
if (filter instanceof BBOX) {
//nothing to do. already encoded above
return extraData;
}
if (filter instanceof DistanceBufferOperator) {
e1.accept(this, extraData);
out.write(".STDistance(");
e2.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 (swapped) {
e2.accept(this, extraData);
}
else {
e1.accept(this, extraData);
}
if (filter instanceof Contains) {
out.write(".STContains(");
}
else if (filter instanceof Crosses) {
out.write(".STCrosses(");
}
else if (filter instanceof Disjoint) {
out.write(".STDisjoint(");
}
else if (filter instanceof Equals) {
out.write(".STEquals(");
}
else if (filter instanceof Intersects) {
out.write(".STIntersects(");
}
else if (filter instanceof Overlaps) {
out.write(".STOverlaps(");
}
else if (filter instanceof Touches) {
out.write(".STTouches(");
}
else if (filter instanceof Within) {
out.write(".STWithin(");
}
else {
throw new RuntimeException("Unknown operator: " + filter);
}
if (swapped) {
e1.accept(this, extraData);
}
else {
e2.accept(this, extraData);
}
out.write(") = 1");
}
} catch (IOException e) {
throw new RuntimeException(e);
}
return extraData;
}
static SimpleDateFormat DATETIME_FORMAT = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
@Override
protected void writeLiteral(Object literal) throws IOException {
if (literal instanceof Date) {
out.write("'" + DATETIME_FORMAT.format(literal) + "'");
} else {
super.writeLiteral(literal);
}
}
}