/** DWithin filter maps to a Point/Radius distance Spatial search criteria. */
@Override
public Object visit(DWithin filter, Object data) {
logger.debug("ENTERING: DWithin filter");
if (curNest == null || NestedTypes.AND.equals(curNest)) {
// The geometric point is wrapped in a <Literal> element, so have to
// get geometry expression as literal and then evaluate it to get
// the geometry.
// Example:
// <ogc:Literal>org.geotools.geometry.jts.spatialschema.geometry.primitive.PointImpl@dc33f184</ogc:Literal>
Literal literalWrapper = (Literal) filter.getExpression2();
// Luckily we know what type the geometry expression should be, so
// we
// can cast it
PointImpl point = (PointImpl) literalWrapper.evaluate(null);
double[] coords = point.getCentroid().getCoordinate();
double distance = filter.getDistance();
logger.debug("point: coords[0] = " + coords[0] + ", coords[1] = " + coords[1]);
logger.debug("radius = " + distance);
this.spatialSearch = new SpatialDistanceFilter(coords[0], coords[1], distance);
filters.add(filter);
} else {
logger.warn(ONLY_AND_MSG);
}
logger.debug("EXITING: DWithin filter");
return super.visit(filter, data);
}
private void handleTemporal(BinaryTemporalOperator filter) {
Literal literalWrapper = (Literal) filter.getExpression2();
logger.debug("literalWrapper.getValue() = " + literalWrapper.getValue());
Object literal = literalWrapper.evaluate(null);
if (literal instanceof Period) {
Period period = (Period) literal;
// Extract the start and end dates from the filter
Date start = period.getBeginning().getPosition().getDate();
Date end = period.getEnding().getPosition().getDate();
temporalSearch = new TemporalFilter(start, end);
filters.add(filter);
} else if (literal instanceof PeriodDuration) {
DefaultPeriodDuration duration = (DefaultPeriodDuration) literal;
// Extract the start and end dates from the filter
Date end = Calendar.getInstance().getTime();
Date start = new Date(end.getTime() - duration.getTimeInMillis());
temporalSearch = new TemporalFilter(start, end);
filters.add(filter);
}
}
Object visitDistanceSpatialOperator(
DistanceBufferOperator filter,
PropertyName property,
Literal geometry,
boolean swapped,
Object extraData) {
try {
if ((filter instanceof DWithin && !swapped) || (filter instanceof Beyond && swapped)) {
out.write("db2gse.ST_Distance(");
property.accept(this, extraData);
out.write(",");
geometry.accept(this, extraData);
out.write(") < ");
out.write(Double.toString(filter.getDistance()));
addSelectivity();
}
if ((filter instanceof DWithin && swapped) || (filter instanceof Beyond && !swapped)) {
out.write("db2gse.ST_Distance(");
property.accept(this, extraData);
out.write(",");
geometry.accept(this, extraData);
out.write(") > ");
out.write(Double.toString(filter.getDistance()));
addSelectivity();
}
return extraData;
} catch (IOException ex) {
throw new RuntimeException(ex);
}
}
public void testParse() throws Exception {
FilterMockData.literal(document, document);
Literal literal = (Literal) parse();
assertNotNull(literal);
assertEquals("foo", literal.getValue());
}
public Object visit(Literal expression, Object notUsed) {
if (expression.getValue() == null) {
postStack.push(expression);
}
preStack.push(expression);
return null;
}
/** Contains filter maps to a Polygon or BBox Spatial search criteria. */
@Override
public Object visit(Contains filter, Object data) {
logger.debug("ENTERING: Contains filter");
if (curNest == null || NestedTypes.AND.equals(curNest)) {
// The geometric point is wrapped in a <Literal> element, so have to
// get geometry expression as literal and then evaluate it to get
// the geometry.
// Example:
// <ogc:Literal>org.geotools.geometry.jts.spatialschema.geometry.primitive.SurfaceImpl@64a7c45e</ogc:Literal>
Literal literalWrapper = (Literal) filter.getExpression2();
Object geometryExpression = literalWrapper.getValue();
StringBuffer geometryWkt = new StringBuffer();
if (geometryExpression instanceof SurfaceImpl) {
SurfaceImpl polygon = (SurfaceImpl) literalWrapper.evaluate(null);
Coordinate[] coords = polygon.getJTSGeometry().getCoordinates();
geometryWkt.append("POLYGON((");
for (int i = 0; i < coords.length; i++) {
geometryWkt.append(coords[i].x);
geometryWkt.append(" ");
geometryWkt.append(coords[i].y);
if (i != (coords.length - 1)) {
geometryWkt.append(",");
}
}
geometryWkt.append("))");
this.spatialSearch = new SpatialFilter(geometryWkt.toString());
logger.debug("geometryWkt = [" + geometryWkt.toString() + "]");
filters.add(filter);
} else {
logger.warn("Only POLYGON geometry WKT for Contains filter is supported");
}
} else {
logger.warn(ONLY_AND_MSG);
}
logger.debug("EXITING: Contains filter");
return super.visit(filter, data);
}
/**
* Construct the appropriate geometry type from the WKT representation of a literal expression
*
* @param expression the expression turn into a geometry constructor.
* @throws IOException Passes back exception if generated by this.out.write()
*/
public void visitLiteralGeometry(Literal expression) throws IOException {
String wktRepresentation = wktWriter.write((Geometry) expression.getValue());
int spacePos = wktRepresentation.indexOf(" ");
String geomType = wktRepresentation.substring(0, spacePos);
this.out.write("db2gse.ST_" + geomType + "('" + wktRepresentation + "', " + getSRID() + ")");
}
/**
* Implementation of getProperty for {@link BinarySpatialOpTypeBinding} and {@link
* DistanceBufferTypeBinding}
*
* @param e1 First expression
* @param e2 Second expression
* @param name name of property
* @return the object for the property, or null
*/
static Object property(Expression e1, Expression e2, QName name) {
if (OGC.PropertyName.equals(name)) {
if (e1 instanceof PropertyName) {
return e1;
} else if (e2 instanceof PropertyName) {
return e2;
}
}
if (new QName(GML.NAMESPACE, "_Geometry").equals(name)) {
if (e1 instanceof Literal) {
Literal literal = (Literal) e1;
if (literal.getValue() instanceof Geometry) {
return literal.getValue();
}
} else if (e2 instanceof Literal) {
Literal literal = (Literal) e2;
if (literal.getValue() instanceof Geometry) {
return literal.getValue();
}
}
}
if (new QName(GML.NAMESPACE, "Box").equals(name) /*filter 1.0*/
|| new QName(GML.NAMESPACE, "Envelope").equals(name) /*filter 1.1*/) {
if (e1 instanceof Literal) {
Literal literal = (Literal) e1;
if (literal.getValue() instanceof Envelope) {
return literal.getValue();
}
} else if (e2 instanceof Literal) {
Literal literal = (Literal) e2;
if (literal.getValue() instanceof Envelope) {
return literal.getValue();
}
}
}
return null;
}
