@Override
	public void afterPropertiesSet() throws Exception {
		super.afterPropertiesSet();
		Assert.notNull(sql, "The SQL query must be provided");
		Assert.notNull(rowMapper, "RowMapper must be provided");
	}
@ Override public void afterPropertiesSet ( ) throws Exception { super . afterPropertiesSet ( ) ; Assert . notNull ( sql , "The SQL query must be provided" ) ; Assert . notNull ( rowMapper , "RowMapper must be provided" ) ; }
Assert that mandatory properties are set.

@throws IllegalArgumentException if either data source or sql properties
not set.