public String getWorkItem(String containerId, Number processInstanceId, Number workItemId, String marshallingType) { containerId = context.getContainerId(containerId, new ByProcessInstanceIdContainerLocator(processInstanceId.longValue())); WorkItem workItem = processService.getWorkItem(containerId, processInstanceId.longValue(), workItemId.longValue()); if (workItem == null) { throw new IllegalStateException("Unable to find work item with id " + workItemId); } WorkItemInstance workItemInstance = WorkItemInstance.builder() .id(workItem.getId()) .nodeInstanceId(((org.drools.core.process.instance.WorkItem) workItem).getNodeInstanceId()) .processInstanceId(workItem.getProcessInstanceId()) .containerId(((org.drools.core.process.instance.WorkItem) workItem).getDeploymentId()) .name(workItem.getName()) .nodeId(((org.drools.core.process.instance.WorkItem) workItem).getNodeId()) .parameters(workItem.getParameters()) .state(workItem.getState()) .build(); logger.debug("About to marshal work item {}", workItemInstance); String response = marshallerHelper.marshal(containerId, marshallingType, workItemInstance, new ByProcessInstanceIdContainerLocator(processInstanceId.longValue())); return response; }