I have a circumstance where I have to create a lot of forms for an application, the forms are all located in the same package. They are named like: A11111.java, A11112.java, etc.
When the user clicks in the NavigationPane, I wish to load the form into a TabItem and display the form. The issue is I need to dynamically generate the name of the form by appending the form name to the location, such as String formName = "com.foo.appName.client.forms" + e.getData("formCode"); something like that, where e is the event of the user click.
I have looked at several Reflection methods, but you cannot pass a derived string to them. How best to do this? Several posts mention using generators, but I get lost trying to sort their logic, and none have to do with displaying forms.
Note, I am not passing any variables to the forms, or calling any methods in the form java files, also the forms are created using uibinding.
Thanks in advance
if you're aiming at lazy-loading classes via the class-loader, like you would when using the command design pattern, note that it can't be done within a GWT application, as the frameworks JRE emulation only provides a subset of types and/or methods available in the JRE, so most of the reflection API - like forName() - will not be available.
rather than lazy-loading classes, think in terms of lazy-rendering widgets to the DOM. this can be achieved by instantiating all your form classes on module load, but only render upon tab-switching. place all your render-related functionality inside onRender() callbacks and you're good to go:
public class FormItem extends TabItem {
@Override
protected void onRender(Element parent, int index) {
super.onRender(parent, index);
// render related functionality
}
}