package com.vividsolutions.jtstest.function;
import java.util.ArrayList;
import java.util.List;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.operation.valid.IsValidOp;
import com.vividsolutions.jts.operation.valid.TopologyValidationError;
public class ValidationFunctions
{
/**
* Validates all geometries in a collection independently.
* Errors are returned as points at the invalid location
*
* @param g
* @return
*/
public static Geometry invalidLocations(Geometry g)
{
List invalidLoc = new ArrayList();
for (int i = 0; i < g.getNumGeometries(); i++) {
Geometry geom = g.getGeometryN(i);
IsValidOp ivop = new IsValidOp(geom);
TopologyValidationError err = ivop.getValidationError();
if (err != null) {
invalidLoc.add(g.getFactory().createPoint(err.getCoordinate()));
}
}
return g.getFactory().buildGeometry(invalidLoc);
}
public static Geometry invalidGeoms(Geometry g)
{
List invalidGeoms = new ArrayList();
for (int i = 0; i < g.getNumGeometries(); i++) {
Geometry geom = g.getGeometryN(i);
IsValidOp ivop = new IsValidOp(geom);
TopologyValidationError err = ivop.getValidationError();
if (err != null) {
invalidGeoms.add(geom);
}
}
return g.getFactory().buildGeometry(invalidGeoms);
}
}