Aggregating table - how to solve this with ADF Faces

Question

Hello.
I am trying to solve something that would typically be really simple. However, now i' using ADF faces which is new to me and i'm stuck.
I want to show a table of rows with aggregated numbers (department in example below) and then "open up" any row by clicking on it to display the numbers that make up the aggregate (the guys in the helpdesk department in the example below).
Something like this:
DEPARTMENT SALARIES
+Sales                  1.234.567
+Warehouse         3.425.553
-Helpdesk 655.000
Joe 155.000
Jill 300.001
Burt 199.999
+Personnel           546.225
+Management     9.646.383
And to make things more complicated, some of the aggregate rows in my real life example don't have any underlying rows. They just have the total. Can anyone give me hint about how to do this with an ADF Faces-control? I need to show management this can be solved quick and simple with ADF Faces, so i can convince them that it is the way we should be working in the future.
Edited by: GoodCoffee on Jun 2, 2009 4:15 AM. Trying to indent the three rows under "Helpdesk"

Answer 1

Hi,
if you use ADF BC as the business Service then you can create a transient attribute (one that does not ave a database column ) and compute the total. Using JDeveloper 11g, you can use a Groovy expression. The below example calculates the Overall Salary paid by an department. The transient attribute is defined on the Department Entity Object
XML View
<Attribute
    Name="SumSalary"
    ColumnName="SUMSALARY"
    SQLType="NUMERIC"
    Type="java.lang.Long"
    ColumnType="NUMBER"
    IsQueriable="false"
    IsPersistent="false">
    <TransientExpression><![CDATA[Employees1.sum("Salary")]]></TransientExpression>
  </Attribute>The Employees1.sum("Salary") string is the Groovy expression that you need to add for the attribute. You select the created transient attribute in the EO editor and press the pencil icon. Then you select "Expression" as the value type and add the string.
See: http://www.oracle.com/technology/products/jdev/11/how-tos/groovy/introduction_to_groovy.pdf
Frank