Trying to use a JDeveloper Tutorial in OEPE

Question

Hey guys,
I'm trying to develop this example: http://www.oracle.com/technetwork/developer-tools/adf/learnmore/59-table-filter-by-data-range-176653.pdf in OEPE with a few variations. Since I don't want to use databases I dynamically create a table via a managed bean. That table has 4 columns but only the first one named "Id" is relevant to my problem. The java classes I've created so far are:
"TableRow": Represents a single row containing 4 columns
"TableController": This class is my managed bean for the table itself. It dynamically creates the table content und has 1 getter and 1 setter method for the list of TableRow's created to access them later in the .jspx page.
"QueryEventListener": This class is also a managed bean and should use the filter described in the tutorial above in its "onQuery(QueryEvent event)" method.
I've even created 3 classes that extend "ViewObject", "ViewObjectImpl" and "ViewUsageImpl" as in the JDeveloper example but I think I must have missed a few lines in a .xml file since my onQuery-Method is called but the "MethodExpression.invoke"-method throws a NullPointerEception. (All parameters of the invoke method are != null).
Did anyone of you try to use this tutorial in OEPE and how did you make it work?
Any help is appreciated

Answer 1

Hi,
The sample you have mentioned is based on using the ADF Business Component (ADF BC) framework. The following code in the sample requires an ADF Bindings to the ADF BC Model :
invokeMethodExpression("#{bindings.allEmployeesQuery.processQuery}", Object.class,QueryEvent.class,queryEvent);
Since you are using a client side in-memory collection, you have no valid bindings to the ADF BC model and hence the exception. You can simplify your implementation by filtering your in-memory collection in the bean based on the value of the filterCriteria attributes "HireStartRange" and "HireEndRange".
Please note that OEPE has no support for the ADF BC framework. Instead, you may use an EJB DataControl or a POJO datacontrol to create ADF Bindings in the page. Hope this helps.
Thanks
Raghu