resultset optional colum reader implemented using generics and lambda, for java 8

resultSet.java

/**
 * WARNINIG works with ojdbc7 only
 * 
 * @param rs
 * @param columnName
 * @param columnType
 * @param reader
 * @throws SQLException
 */
protected static <T> void readOptionalColumn(
    ResultSet rs, 
    String columnName, 
    Class<T> columnType,
    Consumer<T> reader
) throws SQLException {
    try {
        reader.accept(rs.getObject(columnName, columnType));
    } catch (SQLException e) {
        String message = e.getMessage();
        if (message == null) return;
        String expectedOracleMessage = "Invalid column name";
        String expectedPostgresMessage = String.format(
            "The column name %s was not found",
            columnName
        ); 
        if (!message.equals(expectedOracleMessage) && message.indexOf(expectedPostgresMessage) == -1) {
            throw e;
        }
    }
}
//...
readOptionalColumn(rs, "comments", String.class, dt::setComments);