Examples of org.camunda.bpm.engine.delegate.TaskListener

org.camunda.bpm.engine.delegate.TaskListener
Listener interface implemented by user code which wants to be notified when a property of a task changes.
The following Task Events are supported:
- {@link #EVENTNAME_CREATE}
- {@link #EVENTNAME_ASSIGNMENT}
- {@link #EVENTNAME_COMPLETE}
- {@link #EVENTNAME_DELETE}
@author Tom Baeyens

      for (Element taskListenerElement : taskListenerElements) {
        String eventName = taskListenerElement.attribute("event");
        if (eventName != null) {
          if (TaskListener.EVENTNAME_CREATE.equals(eventName) || TaskListener.EVENTNAME_ASSIGNMENT.equals(eventName)
                  || TaskListener.EVENTNAME_COMPLETE.equals(eventName) || TaskListener.EVENTNAME_DELETE.equals(eventName)) {
            TaskListener taskListener = parseTaskListener(taskListenerElement);
            taskDefinition.addTaskListener(eventName, taskListener);
          } else {
            addError("Attribute 'event' must be one of {create|assignment|complete|delete}", userTaskElement);
          }
        } else {

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      }
    }
  }


  protected TaskListener parseTaskListener(Element taskListenerElement) {
    TaskListener taskListener = null;


    String className = taskListenerElement.attribute("class");
    String expression = taskListenerElement.attribute("expression");
    String delegateExpression = taskListenerElement.attribute("delegateExpression");
    Element scriptElement = taskListenerElement.elementNS(BpmnParser.ACTIVITI_BPMN_EXTENSIONS_NS, "script");

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