Set calledElement using expression at runtime with Multi Instance Loop

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sunshare

Hey,

I am having a issue with setting the calledElement at runtime for CallActivity with MultiInstanceLoopCharacteristics. This is how I created my CallActivity.

        CallActivity callActivity = new CallActivity();
        callActivity.setId(callAcitityId);
        callActivity.setName(callAcitityId);
        callActivity.setCalledElement("${processToCall}");

        IOParameter ioRowParameter = new IOParameter();
        ioRowParameter.setSource("row");
        ioRowParameter.setTarget("row");

        //This is my thought, that if we can pass in the processToCall from the MultiInstanceLoopCharacteristics or from the parent process. Then, it can resolve my calledElement expression ${processToCall}
        IOParameter ioProcessKeyParameter = new IOParameter();
        ioProcessKeyParameter.setSource("processToCall");
        ioProcessKeyParameter.setTarget("processToCall");

        callActivity.setInParameters(Arrays.asList(ioRowParameter));

        MultiInstanceLoopCharacteristics multiInstanceLoopCharacteristics = new MultiInstanceLoopCharacteristics();
        multiInstanceLoopCharacteristics.setSequential(false);
        multiInstanceLoopCharacteristics.setInputDataItem("rows");
        multiInstanceLoopCharacteristics.setElementVariable("row");

        callActivity.setLoopCharacteristics(multiInstanceLoopCharacteristics);

        return callActivity;
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My problem is MultiInstanceLoopCharacteristics only supports collection data, which I used for my data rows. How can I pass in the processToCall into my CallActivity instance to resolve my calledElement at runtime?

Let me know if you need more detail or anything is unclear. Thanks,
Lesong

sunshare

After referring to this post https://forums.activiti.org/content/diagram-not-generated-when-using-expression-callactivity, I change my expression to get variable from the execution. So, it will be something like:
<code>
        callActivity.setCalledElement("${execution.getVariable('row').get('proocessToCall')}");
</code>

Then, I put a processToCall to my loop collection. Problem solved! Yeah~