Support for jBPMN dialect

[valb3r]

Is your feature request related to a problem? Please describe.
Add support for jBPMN dialect. See #299 (comment) for example

[Damounet]

Nice, I'd be glad to help you or test anything if you need.

[valb3r]

@Damounet If you are willing to help, you can have a look at https://github.com/valb3r/flowable-bpmn-intellij-plugin/tree/master/activiti-xml-parser - it is an example of what needs to be implemented to parse jBPMN files.
Basically, it would be great if you provide test XML files like the ones here: https://github.com/valb3r/flowable-bpmn-intellij-plugin/tree/master/activiti-xml-parser/src/test/resources
At least files where:

1. All elements available in jBPMN modeler are present (example https://github.com/valb3r/flowable-bpmn-intellij-plugin/blob/master/activiti-xml-parser/src/test/resources/popurri.bpmn20.xml)
2. Per element file with all properties declared (example https://github.com/valb3r/flowable-bpmn-intellij-plugin/blob/master/activiti-xml-parser/src/test/resources/custom-service-tasks/script-task.bpmn20.xml)

With these, it would be clearer what is the amount of work. And they are going to be used to test dialect implementation

[Damounet]

Is this the kind of stuff you are looking to ?

popurri.bpmn.md
which is represented like that :

This file contains all the components I can create.
Too achieve that I used this VsCode extension https://marketplace.visualstudio.com/items?itemName=redhat.vscode-extension-bpmn-editor but I haven't found on their repository (https://github.com/kiegroup/kogito-tooling) any test file like the one you are looking for.

If this suits your needs, I'll work on the on file per component next week :)

[valb3r]

@Damounet, thanks

Is this the kind of stuff you are looking to ?

Yes, the only thing the elements need to be connected with sequence flow, as jBPMN seem to use different anchors (center of the rectangle) compared to the current implementation