/**
* Tests whether this geometry intersects a given geometry.
*
* @param geom the test geometry
* @return true if the test geometry intersects
*/
public boolean intersects(Geometry geom) {
/** If any segments intersect, obviously intersects = true */
List lineSegStr = SegmentStringUtil.extractSegmentStrings(geom);
boolean segsIntersect = prepLine.getIntersectionFinder().intersects(lineSegStr);
// MD - performance testing
// boolean segsIntersect = false;
if (segsIntersect) return true;
/** For L/L case we are done */
if (geom.getDimension() == 1) return false;
/** For L/A case, need to check for proper inclusion of the target in the test */
if (geom.getDimension() == 2 && prepLine.isAnyTargetComponentInTest(geom)) return true;
/** For L/P case, need to check if any points lie on line(s) */
if (geom.getDimension() == 0) return isAnyTestPointInTarget(geom);
// return prepLine.getGeometry().intersects(geom);
return false;
}
/**
* Tests whether any representative point of the test Geometry intersects the target geometry.
* Only handles test geometries which are Puntal (dimension 0)
*
* @param geom a Puntal geometry to test
* @return true if any point of the argument intersects the prepared geometry
*/
protected boolean isAnyTestPointInTarget(Geometry testGeom) {
/**
* This could be optimized by using the segment index on the lineal target. However, it seems
* like the L/P case would be pretty rare in practice.
*/
PointLocator locator = new PointLocator();
List coords = ComponentCoordinateExtracter.getCoordinates(testGeom);
for (Iterator i = coords.iterator(); i.hasNext(); ) {
Coordinate p = (Coordinate) i.next();
if (locator.intersects(p, prepLine.getGeometry())) return true;
}
return false;
}