I have been trying to use the IGeometryFactoryProxy.createGeometryFromWkbVariant to convert OGC WKB into an IGeometry object. I have had no luck with this at all. Was unable to find any Java example on this. The Wkb bytes are valid since I am able to convert them into geometry using another third party API esri-geometry-core. The doucumentation suggests that I should pass in the byte[], a single element array of IGeometry (I have no idea if this array should be empty or populated with empty geometry but I assigned an empty geometry anyways), lastly a single element int[1] which holds the size of WKB at [0]. as suggested by the documentation. I get Null Pointer exception with the following stack
java.lang.NullPointerException
at com.esri.arcgis.interop.Dispatch.vtblInvoke(Unknown Source)
at com.esri.arcgis.geometry.IGeometryFactoryProxy.createGeometryFromWkbV
ariant(Unknown Source)
my java code
IGeometry[] geomArr = new IGeometry[1];
geomArr[0]=new com.esri.arcgis.geometry.Polygon(); //populate with an empty polygon
byte[] wkb = ... //populate bytes array
int[] intArr = new int[1];
intArr[0]=wkb.length; //size of bytes
IGeometryFactory3Proxy geometryFactory = new IGeometryFactory3Proxy();
geometryFactory.createGeometryFromWkb(intArr, wkb, geomArr); //tried this
geometryFactory.createGeometryFromWkbVariant(wkb, geomArr, intArr); //also tried this
geomArr[0].toString();
any idea what am I doing wrong.
