/************************************************************************/
/*                          FLTApplyFilterToLayer                       */
/*                                                                      */
/*      Use the filter encoding node to create mapserver expressions    */
/*      and apply it to the layer.                                      */
/************************************************************************/
int FLTApplyFilterToLayer(FilterEncodingNode *psNode, mapObj *map, 
                          int iLayerIndex, int bOnlySpatialFilter)
{
    layerObj *layer = map->layers + iLayerIndex;

    if ( ! layer->vtable) {
		int rv = 0;

        if (rv = msLayerOpen(layer) != MS_SUCCESS)
            return rv;
    }
    return layer->vtable->LayerApplyFilterToLayer(psNode, map, 
                                                  iLayerIndex, 
                                                  bOnlySpatialFilter);
}

/************************************************************************/
/*                   FLTLayerApplyPlainFilterToLayer                    */
/*                                                                      */
/* Helper function for layer virtual table architecture                 */
/************************************************************************/
int FLTLayerApplyPlainFilterToLayer(FilterEncodingNode *psNode, mapObj *map, 
                                    int iLayerIndex, int bOnlySpatialFilter)
{
    int *panResults = NULL;
    int nResults = 0;
    layerObj *psLayer = NULL;

    psLayer = &(map->layers[iLayerIndex]);
    panResults = FLTGetQueryResults(psNode, map, iLayerIndex,
                                    &nResults, bOnlySpatialFilter);
    if (panResults) {
//        FLTAddToLayerResultCache(panResults, nResults, map, iLayerIndex);
    /* clear the cache if the results is NULL to make sure there aren't */
    /* any left over from intermediate queries. */
	}
    else 
    {
        if (psLayer && psLayer->resultcache)
        {
            if (psLayer->resultcache->results)
                free (psLayer->resultcache->results);
            free(psLayer->resultcache);
            
            psLayer->resultcache = NULL;
        }
    }

    if (panResults)
        free(panResults);

    return MS_SUCCESS;
}