/*
* 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.mysql;
import java.io.IOException;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
import org.geotools.data.jdbc.FilterToSQL;
import org.geotools.filter.FilterCapabilities;
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 MySQLFilterToSQL extends FilterToSQL {
@Override
protected FilterCapabilities createFilterCapabilities() {
//MySQL does not actually implement all of the special functions
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(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( "GeomFromText('"+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 (!(filter instanceof Disjoint)) {
out.write("MbrIntersects(");
e1.accept(this, extraData);
out.write(",");
e2.accept(this, extraData);
out.write(")");
if (!(filter instanceof BBOX)) {
out.write(" AND ");
}
}
if (filter instanceof BBOX) {
//nothing to do. already encoded above
return extraData;
}
if (filter instanceof DistanceBufferOperator) {
out.write("Distance(");
e1.accept(this, extraData);
out.write(", ");
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 (filter instanceof BBOX) {
}
else {
if (filter instanceof Contains) {
out.write("Contains(");
}
else if (filter instanceof Crosses) {
out.write("Crosses(");
}
else if (filter instanceof Disjoint) {
out.write("Disjoint(");
}
else if (filter instanceof Equals) {
out.write("Equals(");
}
else if (filter instanceof Intersects) {
out.write("Intersects(");
}
else if (filter instanceof Overlaps) {
out.write("Overlaps(");
}
else if (filter instanceof Touches) {
out.write("Touches(");
}
else if (filter instanceof Within) {
out.write("Within(");
}
else {
throw new RuntimeException("Unknown operator: " + filter);
}
if (swapped) {
e2.accept(this, extraData);
out.write(", ");
e1.accept(this, extraData);
}
else {
e1.accept(this, extraData);
out.write(", ");
e2.accept(this, extraData);
}
out.write(")");
}
}
catch (IOException e) {
throw new RuntimeException(e);
}
return extraData;
}
@Override
protected void writeLiteral(Object literal) throws IOException {
if (literal instanceof Date) {
Calendar c = Calendar.getInstance(TimeZone.getTimeZone("GMT"));//make sure Date and cal tz match
c.setTime((Date)literal);
// GR: TODO I think this method should check for whether literal is a
// java.sql.Date/Time/Timestamp and use the appropriate format instead for the server to
// evaluate to a SQL DATE/TIME/DATETIME as appropriate:
// http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_str-to-date
//JD: no timezone handling... str_to_date does not allow us to specify time zone..
// instead we just get whatever the database/server default timezone is... so this
// obviously fails if the client and server are in different times zones
out.write(String.format("STR_TO_DATE('%d,%d,%d,%d,%d,%d,%d'",
c.get(Calendar.YEAR),c.get(Calendar.MONTH)+1,c.get(Calendar.DAY_OF_MONTH),
c.get(Calendar.HOUR_OF_DAY),c.get(Calendar.MINUTE),c.get(Calendar.SECOND),
c.get(Calendar.MILLISECOND) * 1000) + ",'%Y,%m,%d,%H,%i,%s,%f')");
}
else {
super.writeLiteral(literal);
}
}
}