Feature iterator within another - is it possible?

Hi, everybody,

I want to use two feature iterators (XfmFeatureIteratorP) at the same time.

I'd like to know if it is possible to use one iterator within another?

In my example program ends at the line:

xfmFeatureIterator_getNext(iterator, &feature);

in locate1() procedure. I suppose it's caused by running the second iterator in locate2() or by the second XfmLocateOp.

Am I right?

Regards,

Mariusz

Example (I have removed all necessary code to make the example clearer):

void locate1(XfmLocateOpP locateOp) {

  XfmFeatureIteratorP        iterator1 = NULL;

  XfmFeatureP                        feature;

  int status;

  status = xfmLocateOp_getLocatedFeatures (locateOp, &iterator);

  status = xfmFeatureIterator_getFirst (iterator, &feature);

  while(feature != NULL) {

    procedure1(feature);

    xfmFeature_free (&feature);

    xfmFeatureIterator_getNext(iterator, &feature);

  }

  xfmFeatureIterator_free (&iterator);

}

void procedure1(XfmFeatureP feature)

{

  XfmLocateOpP   locateOp = NULL;

  int status;

  status = xfmLocateOp_create (&locateOp);
  if (SUCCESS != status)  {
      return status;
  }

  xfmCmdMgr_startLocateOperation (locateOp, locate2, NULL, NULL, NULL, NULL);

}

void locate2(XfmLocateOpP locateOp) {

  XfmFeatureIteratorP        iterator1 = NULL;

  XfmFeatureP                        feature;

  int status;

  status = xfmLocateOp_getLocatedFeatures (locateOp, &iterator);

  status = xfmFeatureIterator_getFirst (iterator, &feature);

  while(feature != NULL) {

    // do something

    xfmFeature_free (&feature);

    xfmFeatureIterator_getNext(iterator, &feature);

  }

  xfmFeatureIterator_free (&iterator);

}