package io.github.ryanfb.georefine; import java.util.Properties; import org.json.JSONException; import org.json.JSONWriter; import com.google.refine.expr.EvalError; import com.google.refine.grel.ControlFunctionRegistry; import com.google.refine.grel.Function; import org.geotools.geometry.GeometryBuilder; import org.geotools.referencing.crs.DefaultGeographicCRS; import org.opengis.geometry.primitive.PrimitiveFactory; import org.geotools.geometry.jts.JTS; import com.vividsolutions.jts.geom.Coordinate; import org.geotools.referencing.GeodeticCalculator; import com.vividsolutions.jts.geom.Geometry; public class Distance implements Function { public Object call(Properties bindings, Object[] args) { if(args.length==2){ try { return JTS.orthodromicDistance( ((com.vividsolutions.jts.geom.Point)args[0]).getCoordinate(), ((com.vividsolutions.jts.geom.Point)args[1]).getCoordinate(), DefaultGeographicCRS.WGS84); } catch (org.opengis.referencing.operation.TransformException e) { return new EvalError(ControlFunctionRegistry.getFunctionName(this) + ": TransformException: " + e.getMessage()); } } return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects 2 arguments"); } public void write(JSONWriter writer, Properties options) throws JSONException { writer.object(); writer.key("description"); writer.value("computes distance between coordinates"); writer.key("params"); writer.value("point1, point2"); writer.key("returns"); writer.value("distance in meters"); writer.endObject(); } }