topic getRenderedTaskForm Null Pointer Exception for Ad Hoc task in Alfresco Archive https://connect.hyland.com/t5/alfresco-archive/getrenderedtaskform-null-pointer-exception-for-ad-hoc-task/m-p/92875#M63526 <HTML><HEAD></HEAD><BODY><SPAN>When I call formService.getRenderedTaskForm with a task id of a task that just happens to be an ad-hoc task a Null Pointer Exception is thrown in Activiti 5.9. I'm assuming this is a bug but am posting here first. My code:</SPAN><BR /><BR /><PRE class="language-none line-numbers"><CODE> public DataHandler getForm() {<BR />&nbsp;&nbsp;&nbsp; DataHandler dh = null;<BR />&nbsp;&nbsp;&nbsp; FormService formService = processEngine.getFormService();<BR />&nbsp;&nbsp;&nbsp; String form = null;<BR />&nbsp;&nbsp;&nbsp; if ((form = (String)formService.getRenderedTaskForm(task.getId())) != null) {<BR /><BR />&nbsp;&nbsp;&nbsp; }<BR /><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN></CODE></PRE><BR /><SPAN>Stacktrace as follows:</SPAN><BR /><BR /><BLOCKQUOTE class="jive-quote">2012-05-02 22:34:44,626 SEVERE [org.activiti.engine.impl.interceptor.CommandContext] (http-localhost%2F127.0.0.1-8080-8) Error while closing command context: java.lang.NullPointerException<BR />&nbsp;&nbsp;&nbsp;at org.activiti.engine.impl.cmd.GetRenderedTaskFormCmd.execute(GetRenderedTaskFormCmd.java:51) [:5.9]<BR />&nbsp;&nbsp;&nbsp;at org.activiti.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:24) [:5.9]<BR />&nbsp;&nbsp;&nbsp;at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:42) [:5.9]<BR />&nbsp;&nbsp;&nbsp;at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33) [:5.9]<BR />&nbsp;&nbsp;&nbsp;at org.activiti.engine.impl.FormServiceImpl.getRenderedTaskForm(FormServiceImpl.java:44) [:5.9]<BR />&nbsp;&nbsp;&nbsp;at com.ajita.ical.activiti.actTask.getForm(actTask.java:187) [:]</BLOCKQUOTE><BR /><SPAN>Looking at the source of GetRenderedTaskFormCmd it seems that a returned null task definition from getTaskDefinition in org.activiti.engine.impl.persistence.entity.TaskEntity is the likely cause.</SPAN><BR /><BR /><PRE class="language-none line-numbers"><CODE>}<BR />&nbsp;&nbsp;&nbsp; TaskFormHandler taskFormHandler = task.getTaskDefinition().getTaskFormHandler();<BR />&nbsp;&nbsp;&nbsp; if (taskFormHandler == null) {<BR />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return null;<BR />&nbsp;&nbsp;&nbsp; }<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN></CODE></PRE><BR /><SPAN>Presumably ad-hoc tasks have no task definition? I've confirmed this by the db record for the task in question.</SPAN><BR /><BR /><SPAN>My workaround is to check </SPAN><BR /><BR /><PRE class="language-none line-numbers"><CODE>if (task.getTaskDefinitionKey() !=null) {<SPAN class="line-numbers-rows"><SPAN>‍</SPAN></SPAN></CODE></PRE><BR /><SPAN>first, but I would still expect this to be handled gracefully.</SPAN></BODY></HTML> Fri, 04 May 2012 20:31:36 GMT aapthorp 2012-05-04T20:31:36Z getRenderedTaskForm Null Pointer Exception for Ad Hoc task https://connect.hyland.com/t5/alfresco-archive/getrenderedtaskform-null-pointer-exception-for-ad-hoc-task/m-p/92875#M63526 When I call formService.getRenderedTaskForm with a task id of a task that just happens to be an ad-hoc task a Null Pointer Exception is thrown in Activiti 5.9. I'm assuming this is a bug but am posting here first. My code: public DataHandler getForm() {&nbsp;&nbsp;&nbsp; DataHandler dh = null;&nbsp;&nbsp;&nbsp; FormService formS Fri, 04 May 2012 20:31:36 GMT https://connect.hyland.com/t5/alfresco-archive/getrenderedtaskform-null-pointer-exception-for-ad-hoc-task/m-p/92875#M63526 aapthorp 2012-05-04T20:31:36Z Re: getRenderedTaskForm Null Pointer Exception for Ad Hoc task https://connect.hyland.com/t5/alfresco-archive/getrenderedtaskform-null-pointer-exception-for-ad-hoc-task/m-p/92876#M63527 <HTML><HEAD></HEAD><BODY><SPAN>Hi,</SPAN><BR /><BR /><SPAN>Thanks for reporting this, I've quickly fixed it on trunk and you now should receive an ActivitiException that there's no form definition available.</SPAN><BR /><BR /><SPAN>Best regards,</SPAN></BODY></HTML> Mon, 07 May 2012 07:53:34 GMT https://connect.hyland.com/t5/alfresco-archive/getrenderedtaskform-null-pointer-exception-for-ad-hoc-task/m-p/92876#M63527 trademak 2012-05-07T07:53:34Z