Function msQueryByIndex

mapquery.c:470–567

}

int msQueryByIndex(mapObj *map)
{
  layerObj *lp;
  int status;

  resultObj record;

  shapeObj shape;
  double minfeaturesize = -1;

  if(map->query.type != MS_QUERY_BY_INDEX) {
    msSetError(MS_QUERYERR, "The query is not properly defined.", "msQueryByIndex()");
    return(MS_FAILURE);
  }

  if(map->query.layer < 0 || map->query.layer >= map->numlayers) {
    msSetError(MS_QUERYERR, "No query layer defined.", "msQueryByIndex()"); 
    return(MS_FAILURE);
  }

  lp = (GET_LAYER(map, map->query.layer));

  if(!msIsLayerQueryable(lp)) {
    msSetError(MS_QUERYERR, "Requested layer has no templates defined.", "msQueryByIndex()"); 
    return(MS_FAILURE);
  }

  if(map->query.clear_resultcache) {
    if(lp->resultcache) {
      if(lp->resultcache->results) free(lp->resultcache->results);
      free(lp->resultcache);
      lp->resultcache = NULL;
    }
  }

  msLayerClose(lp); /* reset */
  status = msLayerOpen(lp);
  if(status != MS_SUCCESS) return(MS_FAILURE);

  /* build item list, we want *all* items */
  status = msLayerWhichItems(lp, MS_TRUE, NULL);
  if(status != MS_SUCCESS) return(MS_FAILURE);

  if(map->query.clear_resultcache || lp->resultcache == NULL) {
    lp->resultcache = (resultCacheObj *)malloc(sizeof(resultCacheObj)); /* allocate and initialize the result cache */
    MS_CHECK_ALLOC(lp->resultcache, sizeof(resultCacheObj), MS_FAILURE);
    initResultCache( lp->resultcache);
  }

  msInitShape(&shape);

  record.shapeindex = map->query.shapeindex;
  record.tileindex = map->query.tileindex;

  status = msLayerGetShape(lp, &shape, &record);
  if(status != MS_SUCCESS) {
    msSetError(MS_NOTFOUND, "Not valid record request.", "msQueryByIndex()"); 
    return(MS_FAILURE);