code: protected Collection<String> getParameters(final CreateSpatialIndexStatement statement) {
        final Collection<String> parameters = new ArrayList<String>();
        if (StringUtils.trimToNull(statement.getGeometryType()) != null) {
           final String gType = getGtype(statement.getGeometryType().trim());
           if (gType != null) {
              parameters.add("layer_gtype=" + gType);
           }
        }
        if (StringUtils.trimToNull(statement.getTablespace()) != null) {
           parameters.add("tablespace=" + statement.getTablespace().trim());
        }
        return parameters;
     }
docs: Creates the parameters to the spatial index creation statement.
  
  @param statement
  the statement.
  @return the optional parameters for the <code>CREATE INDEX</code> statement.