*/
private Object evaluateDataSource()
throws JspException {
ExpressionHandling expr = new ExpressionHandling(this);
String dataSource = getDataSource();
String ds = expr.ensureValidExpression(dataSource, "dataSource", "DataSourceError");
if (ds == null)
return null;
/* have a valid expression */
return expr.evaluateExpression(dataSource, "dataSource", pageContext);