Expression with conditions

BPMN & Modeling Discussion & Questions
1

Hi,

Suppose I want to do the following:

if input > 0.5 then
   "X"
else 
   "Y"

I can use javascript to do the implememtation, as follows:

<outputEntry id="LiteralExpression" expressionLanguage="javascript"> 
      <text><![CDATA[if (input > 0.5) { "X" } else { "Y" }]]></text>
</outputEntry>

How can do the same using juel?

2

Hi @erzhuanzhou,
Try using conditional operator ${ input > 0.5 ? ‘X’ : ‘Y’}

https://docs.oracle.com/javaee/5/tutorial/doc/bnahq.html

3

Thanks for the help. I works for me.

4

The Camunda DMN engine uses different script languages in different places of a DMN table by default, it is important to be aware which language is used where: https://docs.camunda.org/manual/latest/user-guide/dmn-engine/expressions-and-scripts/#default-expression-languages.

Frankly, I find this less than ideal when explaining DMN to business people - although it is probably just fine if programmers maintain the DMN tables anyway who usually know the Java EL syntax.

I usually reconfigure the engine to use FEEL everywhere, and add the feel-scala extension for better support.

5

Can I used FEEL do the conditional expression?

6