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CDATA in Sequence Flow Condition [message #1757975]

Wed, 22 March 2017 13:13

Imanuel R

Messages: 4
Registered: March 2017

Junior Member

Hello,

i want to add a conditional expression to a sequence flow. This condition consists of an CDATA element. Unfortunatly the plugin replaces the special chars while generating the source:

<![CDATA[${returnsBooleanValueExpression}]]>

<bpmn2:sequenceFlow id="SequenceFlow_9" name="JA" sourceRef="ExclusiveGateway_2" targetRef="UserTask_3">
      <bpmn2:conditionExpression xsi:type="bpmn2:tFormalExpression" id="FormalExpression_2" evaluatesToTypeRef="ItemDefinition_1842">&lt;![CDATA[${returnsBooleanValueExpression}]]&gt;</bpmn2:conditionExpression>
    </bpmn2:sequenceFlow>

Is there any way to avoid that?

Im using
- Eclipse Neon.2
- BPMN2 Modeler: Diagram Editor 1.3.1.Final-v20161006-1425-B58

Kind regards,
Imanuel

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Re: CDATA in Sequence Flow Condition [message #1757978 is a reply to message #1757975]

Wed, 22 March 2017 13:56

Robert Brodt

Messages: 811
Registered: August 2010
Location: Colorado Springs, CO

Senior Member

The reason for this is because XML does not allow the special characters '<' and '>' to appear in the text - these are reserved for start & end tags. When the XML is loaded back into the editor, the < and > entities are converted back to < and >.
This should not be a problem unless you are parsing the XML using some text processor instead of loading it with an XML parser.

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Re: CDATA in Sequence Flow Condition [message #1757995 is a reply to message #1757975]

Wed, 22 March 2017 15:44

Imanuel R

Messages: 4
Registered: March 2017

Junior Member

Yes. You are right! I thought i had to encapsulate the expression manually within the CDATA block. However that didnt work. The Framework didnt accept it. I think it was the broken CDATA-Tag. So i removed it completely.

Assuming following expression:

${costs > 100 && costs < 200}

In the Source it looks like

${costs > 100 &amp;&amp; costs &lt; 200}

Thats weird. The "<"-tag is tanslated but not the ">"-tag...
But after loading the bpmn process everything seems to be ok. So i am fine with that.

Thank yo for the hint.

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Re: CDATA in Sequence Flow Condition [message #1758092 is a reply to message #1757995]

Thu, 23 March 2017 12:55

Ralph Soika

Messages: 192
Registered: July 2009

Senior Member

Yes I also think it's not necessary to embed your expression with a CDATA.
We have done this in our own extension project by defining this behavior directly in the EMF model.
You can take a look into the solution in this tutorial:
https://wiki.eclipse.org/BPMN2-Modeler/DeveloperTutorials/AddingCDATA

But as discussed here, I don't think this is necessary.

===
Ralph

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