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How can I get a itemDefinition related to a process variable?
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created by <a href="http://community.jboss.org/people/francesco.pietrobelli">Francesco Pietrobelli</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/620413#620413">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi guys,</p><p>I would like to build forms for human activities in an automatic and dynamic fashion, but to do this I need to know the data type associated to every dataOutput of the tasks.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>My first idea was to retrieve the data type of a process variable inside a WorkItemHandler in the following way:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-java"><font color="navy"><b>public</b></font> <font color="navy"><b>void</b></font> executeWorkItem(WorkItem item, WorkItemManager manager) <font color="navy">{</font>
     WorkflowProcessInstance currentProcess = (WorkflowProcessInstance) ksession.getProcessInstance(item.getProcessInstanceId());
     HumanTaskNodeInstance currentNode = (HumanTaskNodeInstance) findNodeInstance(item.getId(), currentProcess);
     Map<String, String> outMappings = ht.getHumanTaskNode().getOutMappings();
     <font color="navy"><b>for</b></font> (String outParameterName : outMappings.keySet()) <font color="navy">{</font>
          System.out.println(<font color="red">"Type of process variable: "</font>+currentProcess.getVariable(outMappings.get(outParameterName)).getClass());
     <font color="navy">}</font>
<font color="navy">}</font>
 
 
<font color="navy"><b>private</b></font> WorkItemNodeInstance findNodeInstance(<font color="navy"><b>long</b></font> workItemId,NodeInstanceContainer container) <font color="navy">{</font>
     <font color="navy"><b>for</b></font> (NodeInstance nodeInstance : container.getNodeInstances()) <font color="navy">{</font>
          <font color="navy"><b>if</b></font> (nodeInstance <font color="navy"><b>instanceof</b></font> WorkItemNodeInstance) <font color="navy">{</font>
               WorkItemNodeInstance workItemNodeInstance = (WorkItemNodeInstance) nodeInstance;
               <font color="navy"><b>if</b></font> (workItemNodeInstance.getWorkItem().getId() == workItemId) <font color="navy">{</font>
                    <font color="navy"><b>return</b></font> workItemNodeInstance;
               <font color="navy">}</font>
          <font color="navy">}</font>
          <font color="navy"><b>if</b></font> (nodeInstance <font color="navy"><b>instanceof</b></font> NodeInstanceContainer) <font color="navy">{</font>
               WorkItemNodeInstance result = findNodeInstance(workItemId,((NodeInstanceContainer) nodeInstance));
               <font color="navy"><b>if</b></font> (result != <font color="navy"><b>null</b></font>) <font color="navy">{</font>
                    <font color="navy"><b>return</b></font> result;
               <font color="navy">}</font>
          <font color="navy">}</font>
     <font color="navy">}</font>
     <font color="navy"><b>return</b></font> <font color="navy"><b>null</b></font>;
<font color="navy">}</font>
 
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>But in many case outMappings.get(outParameterName) returns null because process variable wasn't set before and so and i can't invoke getClass() on it.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Does any one have any suggestion? is possible to do this programmatically via API?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Francesco.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>P.S: I'am using jBPM 5.1Final</p></div>
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<p style="margin: 0;">Reply to this message by <a href="http://community.jboss.org/message/620413#620413">going to Community</a></p>
<p style="margin: 0;">Start a new discussion in jBPM at <a href="http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2034">Community</a></p>
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