Hello,
I'm developing a plugin for custom network analysis which consist of:
- GUI class derived from AbstractVisualizer
- test element class derived from ResultsCollector
I've overriden a testStarted() method in test element class to do some
initialization and then to start a separate thread which does the rest.
My problem is that I need to display some information on GUI of my
plugin but I'm not able to get a reference to my GUI object to use it's
methods. I need to do this independently on events of receiving sample
results thus I can't use method add(final SampleResult res).
In the beginnig I was sending GUI object reference to test element class
in modifyTestElement method. This worked very well if I stored the
reference in a static variable in the test element. But as I intend to
add multiple instances of my new component to the test plan I had to
make the variable non-static to have individual reference to each GUI
class instance. And this is where the problem appears. I get
NullPointerException if I do this.
I've done some investigation by using text interpretation of the test
element objects and I found out that:
- when I create the test element in createTestElement it is one instance
- when it is passed to modifyTestElement where GUI reference is passed
in it is still the same instance
- when I try to call a method of GUI from the test element it is
different (new?) instance -> thus the non-static variable which should
store the GUI reference is empty
- when modifyTestElement() is then called again it uses again the
original instance
Could anyone please explain me where and why this new instance is
created and how to get a reference to my GUI class object from test
element object?
Thanks in advance
Shedee
