[jbpm-users] [jBPM Users] - Re: Using Process variables as parameters for method calls

[sebastian.s]

Hello again!

>From the documentation about java activities:


  | <process name="Java" xmlns="http://jbpm.org/4.0/jpdl">
  | 
  |   <start >
  |     <transition to="greet" />
  |   </start>
  | 
  |   <java name="greet" 
  |         class="org.jbpm.examples.java.JohnDoe"
  |         method="hello"
  |         var="answer"
  |         >
  |         
  |     <field name="state"><string value="fine"/></field>
  |     <arg><string value="Hi, how are you?"/></arg>
  |     
  |     <transition to="shake hand" />
  |   </java>
  |   
  |   <java name="shake hand" 
  |         expr="#{hand}"
  |         method="shake"
  |         var="hand"
  |         >
  |         
  |     <arg><object expr="#{joesmoe.handshakes.force}"/></arg>
  |     <arg><object expr="#{joesmoe.handshakes.duration}"/></arg>
  |     
  |     <transition to="wait" />
  |   </java>
  | 
  |   <state name="wait" />
  | 
  | </process>
  | 

anonymous wrote : 
  | For the java task you can pass arguments and use expressions for the value of the arguments. These can afaik be process variable names as well, so that solves one problem. The varying number of arguments is afaik dealt with by jBPM since it uses reflection to find the correct method signature. Not 100% completely sure though. 
  | 

How exactly can I address process instance variables to use them as arguments for method calls?

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