How to execute block of code inside doaftercompose

asked 2020-07-27 23:43:20 +0800

codeLearner
1

In my current project, multiple .zul file applies a composer. In that composer, I have called multiple functions each of which is related to those .zul files. An example of the code is given below:

// variable for first .zul
@Wire               
Combobox cb_1;

// variable for second .zul
@Wire               
Combobox cb_2;

// variable for third .zul
@Wire               
Combobox cb_3;

public void doAfterCompose(Component comp) throws Exception{
    super.doAfterCompose(comp);

    function_1();          // for first .zul file
    function_2();          // for second .zul file
    function_3();          // for third .zul file
}

These functions inside doAfterCompose() populate Combox in those .zul file dynamically. The problem is, say, if I run first .zul file and call only function1() then the program works. Same for other .zul files and functions. But if I run any .zul file but call all of the functions then NullPointerException occurs for the ComboBox variables which are part of other .zul files. I want the code to work like this: all of the functions will be mentioned in the doAfterCompose section but only the necessary one will be called. Say, for first .zul file function1(), for second .zul file function_2(). How to do this? Or if there is any other option.