How to Pass Parameters to ActionListener in ADF

In some cases, it is required to pass a value to ActionListener of ADF Button.

The method that can be invoked by actionListeners has only one parameter of type ActionEvent. 
So I will explain how to pass parameter to that bean method however it contains only one paramater ActionEvent in method signature.

I added button to my page as below



The default signature of ActionLister is 




The workaround I used is adding an attribute tag from the JSF.Core inside the ADF Button So the code in the jsp page looks like this



Note "MyAttrName" is the name of paramater and "MyAttrValue" is the value of paramater.
You can bind  "MyAttrValue" to get any value from page definition.
Now I will write the followign code to get paramatervalue from bean

 
The variable "attrValue" holds the value of paramaters which is "MyAttrValue" in this example.

Thanks
Mahmoud Elsayed

ADF : Send Parameter to actionListener method inside Bean

actionListener method method can be invoked by Adf Button , Link and Image.
actionListeners methods have only one parameter of type javax.faces.event.ActionEvent.

if requirement is to send some parameter to that bean method who’s signature is something like
public void myActionListener(ActionEvent actionEvent)

The solution to achieve this requirement is putting an attribute tag from the JSF.Core inside the commandButton (or whatever actionable component you are using). So the code in the jsp page looks like this:



Now i can get the value in the bean method by using below code

public void myActionListener(ActionEvent actionEvent) {
  // Add event code here...
  String paramValue = (String)actionEvent.getComponent().getAttributes().get("paramName");
  System.out.println("paramValue = " + paramValue);
}

Uncommitted data warning

If you are working entry data page and some feilds has been changed and you moved to another page, data still in cache but not posted or commited.

So to show warning of unsaved data before moving to another page you can do this by setting "Uncommitted data warning" property of af:document to "true". Then whenever user change data and  move out of current page or close the browser, it will display a warning of unsaved data

Thanks