Accessing fields of the af:Query Component

Question

Hi all,
I need to get the value of a dynamic field that is added to the query component at runtime.
In my application there is field named "Member Id" which adds a "select one component" in the advanced search mode.
This "select one component" has a string value "self".
What I need to do is,
When the value "self" is selected from the "select one component" I need to use the Id of the user
as the "Member Id" for the search query.
Is it possible achive this by using af:query component ? or is there a different approch?
I'm using JDeveloper 11.1.1.0.1
Thanks,
Melaka

Answer 1

Melaka,
first create a custom View Object Class for your View Object from the Java Classes pane. Then override the buildQuery() method of the ViewObjectImpl by writing the following code:
@Override
protected String buildQuery(int noUserParams, boolean forRowCount) {
// call super.buildQuery() to allow the framework to build the query
String query = super.buildQuery(noUserParams, forRowCount);
// here you will modify the query
// if the query contains your keyword
if (query.contains("'self'")) {
// replace it with the actual user id
// return the modified query
return query;
I am sure there are other cleaner ways to accomplish this.
Consider for example using two separate attributes: one Transient for your "Member Id" query criteria - what is shown to the user - and another attribute actually mapped to a column that is used for querying. You set the value of the second attribute as the first one changes.
Regards,
Nick