IProjectedCoordinateSystemEdit.define crashes

PeterHastings

I have been working on a specialized containment comparison algorithm for a large global dataset. 

Each feature must be projected from a base class programatically and the
IProjectedCoordinateSystemEdit.define crashes even when taken from the sample code directly

Windows environment using eclipse ganymede and the ArcObjects 10.0 SDK

Has anybody else experienced this issue.  Any healp would be appreciated.

PeterHastings

I was still getting problems with this but I think i found the problem.
You must allocate the full number of possible parameters when passing even if no value is set

private static ISpatialReference getCustomSpatialRefFromFile() throws Exception {//, ISpatialReference inSpaRef
  ISpatialReferenceFactory srf = new SpatialReferenceEnvironment();
  IProjectedCoordinateSystem pcs = (IProjectedCoordinateSystem) srf.createESRISpatialReferenceFromPRJFile("test.prj");
  
                IProjectedCoordinateSystem4GEN pcsGen = (IProjectedCoordinateSystem4GEN) pcs;
  IParameter[][] parameters = new IParameter[1][16];  // the 16 is very important.
  pcsGen.getParameters(parameters);
   for (int i = 0; i < parameters[0].length; i++){
          IParameter currentParameter = parameters[0];
          if (currentParameter != null){
              System.out.println(currentParameter.getName() + ", " +
                  currentParameter.getIndex() + ", " + currentParameter.getValue());
          }
                        // set the value by parameter name
          if (parameters[0].getName().equals("My_Parameter") == true){IParameter p = parameters[0];p.setValue(0);}
   }
   pcs.changed();
   for (int i = 0; i < parameters[0].length; i++){
          IParameter currentParameter = parameters[0];
          if (currentParameter != null)
              System.out.println(currentParameter.getName() + ", " +
                  currentParameter.getIndex() + ", " + currentParameter.getValue());
   }
   
  return pcs;

 }

I hope this helps some other poor soul in the future.

It has to do "I Believe" with how ArcObjects accesses the engine using JNI which we all know can be touchy.  because it is passing marshaled data from java to a COM interface and retrieving then marshaling the return information the Arc Object Com Interface allocates a full array in memory for the object.  If it does not receive empty values to populate those registers it goes all funky.

Just a guess but it works nonetheless.

I will test with define and see if this was the problem in the first place.