#3 Consider changing how we construct classes with optionl args

[Sérgio Fernandes]

As proposed by Joăo Cachopo this bit of code found in file layers/frontend/pt/inesc_id/esw/worksco/frontend/FrontEndWorkflowDefinition.jak:

public WorkflowDefinition compile() {
return new WorkflowDefinition(_id, _name)
.setExecutionGraph(_rootActivity.compile())
.setDataTypes(_dataTypes)
.setFrontEndWorkflowDefinition(this);
}

could be changed to something like

public WorkflowDefinition compile() {
return new WorkflowDefinition(new WorkflowDefinitionArgs() {{
id = _id;
names = names;
executionGraph = _rootActivity.compile();
dataTypes = _dataTypes;
frontEndWorkflowDefinition = FrontEndWorkflowDefinition.this; // bug if I use only 'this'
}});
}
}

And WorkflowDefinitionArgs is something like:

public static class WorkflowDefinitionArgs {
String id; // required arg
List dataTypes = new ArrayList(); // optional arg
}

Even better, if WorkflowDefinitionArgs could be an inner class of WorkflowDefinition, but then AHEAD doesn't support inner classes at the time of writing (will it ever support?)...