topic Re: HashMap problem in Activiti in Alfresco Archive

HashMap problem in Activiti

zlatan316 — Tue, 11 Feb 2014 13:25:07 GMT

Hi,I have the below code which gives me a HashMap and sets it as the variable. @Override public void execute(DelegateExecution execution) throws Exception { Reader readerObj = new Reader(); readerObj.run(); // Creates values in a HashMap within Reader. MainClass mc = n

Re: HashMap problem in Activiti

trademak — Tue, 11 Feb 2014 14:50:02 GMT

Is IsEmpty the exact method name you used? It should be isEmpty() to start with. Is that working?

Best regards,

Re: HashMap problem in Activiti

zlatan316 — Tue, 11 Feb 2014 14:57:42 GMT

Oh lord, that was it. I feel like such a fool Thank you!

Just out of interest, if I was to retrieve something from the HashMap and check it is a string of "123". would the below expression work?

${mapVar.Get('key')=="123"}

The reason I ask is I always though '==' is a way to compare boolean rather than Strings.

Re: HashMap problem in Activiti

jbarrez — Tue, 11 Feb 2014 15:22:29 GMT

yeah, altough it's probably lower-case 'get'. Equality in javascript is always == or even === (type check)

Re: HashMap problem in Activiti

zlatan316 — Tue, 11 Feb 2014 16:24:57 GMT

Thats interesting, as I just tried using the below expressions for two flows coming from an exclusivegateway.

${mapVar.get('MAIN_KEY-time_slot')=="true"} and ${mapVar.get('MAIN_KEY-time_slot')=="false"}

…but I think the map is empty as mapVar.isEmpty() evaluates to true. I get the message "No outgoing sequence flow of the exclusive gateway 'exclusivegateway1' could be selected for continuing the process".

EDIT: I've discovered the passing of the map is what isn't working correctly
<code>
Reader readerObj = new Reader();
readerObj.run(); // Populates HashMap in Reader class.
MainClass mc = new MainClass();
//mc.map = readerObj.getMap(); //This does NOT work. In activiti, nothing evaluates.
mc.map.put("MAIN_KEY-time_slot", "true"); //This works, and can use an expression to evaluate it.
</code>

Any idea why?

Re: HashMap problem in Activiti

jbarrez — Mon, 17 Feb 2014 14:08:21 GMT

Is that put done *after* you added it to the execution? It's possible you need to do that up front.

Anyway, use a map is never a good idea (it gets serialized).
Any reason why using plain vars is not an option? It would simplify a lot of things (you could check the database tables contents yourself for example)