@Override
    public Double getDouble(int index) {
        try {
            return resultSet.getDouble(index);
        } catch (SQLException e) {
            return null;
        }
    }
@see io.apiman.gateway.engine.components.jdbc.IJdbcResultSet#getDouble(int)
gateway/engine/core/src/main/java/io/apiman/gateway/engine/impl/DefaultJdbcResultSet.java