Topology parents java.lang.NoSuchFieldError: m_pFC issue

AndrewEvans — Sat, 26 May 2012 15:47:26 GMT

Hi all,

I was wonder if anyone else had had a problem with getting topology parent objects and knew what this issue was. I'm trying to access topology edge parents within an add-in, and currently getting the following error:

java.lang.NoSuchFieldError: m_pFC
at com.esri.arcgis.interop.NativeObjRef.nativeVtblInvokeNative(Native method)
at com.esri.arcgis.interop.NativeObjRef.nativeVtblInvoke(Unknown Source)
at com.esri.arcgis.interop.Dispatch.vtblInvoke(Unknown Source)
at com.esri.arcgis.geodatabase.IEnumTopologyParentProxy.next(Unknown Source)
at... [my line (see below)]

I noticed someone else had the same issue (without an answer) on the old forums in 2005.

Details:

I have a topology layer set up with two feature classes associated with it, and these are turned on. All of these are in a Feature Dataset in a Personal Geodatabase.

All three are in as Layers, each appearing in the ToC, un-nested (I only mention this, because I have seen the same thing nested somehow into the topology layer on other machines but can't replicated it on mine). Both feature class layers contain relatively simple polyline features.

I am using the following code in the add-in. I note that its an add-in, as I've had no luck getting some of the more standard topology code people use working in that environment. I've left out the try-catches and simplified it a bit for clarity.

Any ideas? Everything I've seen in the C#/VB examples suggests it should work. Am I missing something obvious?

Many thanks, Andy.

// Initialise various bits - meat of code in section beyond

mxDoc = (IMxDocument)app.getDocument();
map = mxDoc.getFocusMap();

TopologyLayer topologyLayer = null;

for (int i=0; i < map.getLayerCount(); i++) {

    ILayer iLayer = map.getLayer(i); // Works: can get name.

    if (iLayer instanceof TopologyLayer) {
        topologyLayer = (TopologyLayer) map.getLayer(i); // Works: can get name.
    } else {
        // Get other layers as IGeoFeatureLayers - works fine.
    }
}

// Code to get the parents

ITopology it = topologyLayer.getTopology();
ITopologyGraph iTopologyGraph = (ITopologyGraph) it.getCache();

IEnvelope ie = mxDoc.getActiveView().getExtent(); // Run with whole map visible
iTopologyGraph.build(ie, true); // Can check extents fine
IEnvelope dirtyE = it.validateTopology(ie); // Returns null, which I think it should.

IEnumTopologyEdge iEnumTopologyEdges = iTopologyGraph.getEdges(); // Have also tried with nodes

iEnumTopologyEdges.reset();

ITopologyEdge ite = iEnumTopologyEdges.next(); // Can print the length of ite's associated geometry

IEnumTopologyParent iEnumTopologyParent = (IEnumTopologyParent)ite.getParents();
    // Have also tried getting the parents by IGeoFeature layer object selection, and from the topologyGraphy.
    // I can select objects in the topology layer by objects in the IGeoFeature layers, and successfully
    // print their lengths, so I know they are tied together somehow.

tagesriTopologyParent pp = iEnumTopologyParent.next(); // Error generated here. Also generates error if I try to
      // just directly read the attributes without the variable label, just using .next().

Re: Topology parents java.lang.NoSuchFieldError: m_pFC issue

AndrewEvans — Tue, 29 May 2012 14:42:24 GMT

Ok, haven't solved this, but worked around it by using the topology elements to select the intersecting elements in the layers using a SpatialFilter applied to each layer in turn, e.g.

spatialFilter.setGeometryByRef((Point) iTopologyNode.getGeometry());
spatialFilter.setSpatialRel(esriSpatialRelEnum.esriSpatialRelIntersects);
spatialFilter.setGeometryField(layerFeatureClassProxy.getShapeFieldName());
featureCursor = new FeatureCursor(iGeoFeaturelayer.search(spatialFilter, false));

Would still be interested to know about the above though, as I'm bound to need it sooner or later. On the face of it, it looks unpleasant (http://docs.oracle.com/javase/7/docs/api/java/lang/NoSuchFieldError.html), but I may be missing something obvious.

topic Re: Topology parents java.lang.NoSuchFieldError: m_pFC issue in Java Maps SDK Questions

Topology parents java.lang.NoSuchFieldError: m_pFC issue

Re: Topology parents java.lang.NoSuchFieldError: m_pFC issue