How to set the binding on a LOV variable based on the value of the calling page

Here is the scenerio: Page is a login (username and password) page and their values are stored in a pod of support. On successful login page two is called (createRequest) based on
a view object 'Userequest '. One of the fields is EmpNo which is a selection on the element of choice ("EmpByMrgLOV" read only view Explorer that contain the variable bind "UserNameId"). I want only to be displayed in the LOV
employees who report to connected users. I tried different ways to set this parameter, but without success. It's my first attempt using JDeveloper and ADF and 4 days have already
was devoted to it. Can someone please tell me where and how to proceed? Be as detailed as possible. I use Jdeveloper 11.1.2.3.
Thank you.

Published by: spcornell on February 27, 2013 12:09

If your still to know how to to this topic, here's an option. I hope this helps.

-----------------PART 1-----------------------------------------------------------------------------------
Override the default constructor as this.
lov instance will be created after the entry of the TF of the 2nd screen, so by LoggenInUser then will start,
and will be used to create the instance of lov uses this value as a bind variable.

SerializableAttribute public class EmpByMrgLOVImpl extends EmpByMrgLOV {}

private String myusernameid ="";

/**
* This is the default constructor (do not remove).
*/

public EmpByMrgLOVImpl() {}

Set usernameid here when built
get the usernameid of the bean class - btw the bean will be updated on the Taskflow method call before execution and now and set in constructor
FacesContext facesContext = FacesContext.getCurrentInstance ();
ELContext elContext = facesContext.getELContext ();
ExpressionFactory expressionFactory = facesContext.getApplication () .getExpressionFactory ();
ValueExpression exp = expressionFactory.createValueExpression (elContext, "#{mySOMEBean.LoggedInUser}", Object.class);
This.myusernameid = (String) exp.getValue (elContext); set the user to act as link var

}

{} public void setmyusernameid (String myusernameid)
This.myusernameid = myusernameid;
}

public String getmyusernameid() {}
Return myusernameid;
}

}

-----------------PART 2--------------------

variable binding must Access EmpByMrgLOV VO using groovy as below

You EmpByMrgLOV YOUR query tab, add bind var as below:
Name = EmpSOMEUser (change to what your query)
Type = String
Value = ADF. Object.viewObject.myusernameid

-----------------PART 3--------------------
Once you have created a method taskflow run between your fist and 2 nd page, add set / gets in the bean for the var as below

public MySOMEBean {}
private Stirng LoggedInUser ="";
{} public void someMethodCalledBeforeTFEntryintoSecoundScreen (String loggedinuser)
if(loggedinuser!=null)
setLoggedInUser (loggedinuser);
else {}
System.out.println ("not loggedin user");
setLoggedInUSer (null); This will result in a null btw pointer
}
}
public setLoggedInUSer {(String loggedinuser) {blah blah}}
public String getLoggedInUser() {blah blah}
}

So part3 gets put first based on what you collect on your first page, then
part1 at lov construction that uses part3 for her time

Tags: Java

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