Getting and setting global var's

[Ed H]

Hi,

I have a working example with two examples using global variables. Now I want to change the global variables from my java code. From all other threads in this forum I cannot find a solution how to make this work. Can somebody tell me how to get and set a global variable from code?

Cheers,

Ed

[Ed H]

Small addendum: getAttribute and setAttribute doesn't work... 

[Kristian Karl]

Hi Ed,

For the global variable to work, you need to prefix it with global.

See this test: org.graphwalker.core.machine.SharedStateTest#accessAttribute

Let me know if it fixes your problem.

Kristian

[Ed H]

Hi Kristian,

This does indeed solve my problem. Thx.

Ed

[Magnus Teekivi]

Hello.

I'm prefixing my global variables with "global." and yet I'm unable to access them in other model implementation Java classes.

I get an error like this:

java.lang.NullPointerException: Cannot invoke "org.graalvm.polyglot.Value.asString()" because the return value of "com.example.modelimplementations.SecondViewTest.getAttribute(String)" is null

I added a commit to my graphwalker-problem GitHub repository that demonstrates this problem in code.

Am I doing something wrong?

Thanks in advance,

Magnus.

[Kristian Karl]

Thanks for the report!
I have a PR that address the problem: https://github.com/GraphWalker/graphwalker-project/pull/264