Use of Enum in ServiceTask Expression

[carsten...@gmail.com]

I have some ServiceTasks that are define as an Expression (Spring) in the process diagram

Example:
<serviceTask id="doSomethins" activiti:expression="#{servicesAdapter.update(id,"5")}" name="Do it">

Is it possible to user an Java Enum instead of String.

Example:

<serviceTask id="doSomethins" activiti:expression="#{servicesAdapter.update(id,Enum.STATE_5)}" name="Do it">

Or some other ideas to get of the Strings and have some constants ?

[Daniel Meyer]

Hi Carsten,

Interesting question. I had to look it up:

According to the Java UEL docs (http://docs.oracle.com/javaee/5/tutorial/doc/bnahq.html), you can use the string representation of the enum constant value:

This means that in your example, instead of writing MyEnum.STATE_5 you can just write "STATE_5":

<serviceTask id="doSomething" activiti:expression="#{servicesAdapter.update(id,"STATE_5")}" name="Do it">

Since the class named "servicesAdapter" accepts a parameter for type MyEnum, the string is automatically converted to the corresponding enum constant value.

Cheers,

Daniel Meyer