parse_gml_surface()

static LWGEOM* parse_gml_surface ( xmlNodePtr  xnode, bool *  hasz, int *  root_srid  )

static

Parse GML Surface (3.1.1)

Definition at line 1548 of file lwgeom_in_gml.c.

{
        xmlNodePtr xa;
        int patch;
        LWGEOM *geom=NULL;
        bool found=false;
 
        if (is_xlink(xnode)) xnode = get_xlink_node(xnode);
        if (xnode == NULL)
                gml_lwpgerror("invalid GML representation", 30);
 
        /* Looking for gml:patches */
        for (xa = xnode->children ; xa != NULL ; xa = xa->next)
        {
                if (xa->type != XML_ELEMENT_NODE) continue;
                if (!is_gml_namespace(xa, false)) continue;
                if (is_gml_element(xa, "patches"))
                {
                        found = true;
                        break;
                }
        }
        if (!found) gml_lwpgerror("invalid GML representation", 51);
 
        /* Processing gml:PolygonPatch */
        for (patch=0, xa = xa->children ; xa != NULL ; xa = xa->next)
        {
                if (xa->type != XML_ELEMENT_NODE) continue;
                if (!is_gml_namespace(xa, false)) continue;
                if (!is_gml_element(xa, "PolygonPatch")) continue;
                patch++;
 
                /* SQL/MM define ST_CurvePolygon as a single patch only,
                   cf ISO 13249-3:2009 -> 4.2.9 (p27) */
                if (patch > 1) gml_lwpgerror("invalid GML representation", 52);
 
                geom = parse_gml_patch(xa, hasz, root_srid);
        }
 
        if (!patch) gml_lwpgerror("invalid GML representation", 53);
 
        return geom;
}

References get_xlink_node(), gml_lwpgerror(), is_gml_element(), is_gml_namespace(), is_xlink(), and parse_gml_patch().

Referenced by parse_gml().

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