恢复工作流回退

ibzwf-core/src/main/java/cn/ibizlab/core/workflow/extensions/service/WFCoreService.java

@@ -34,6 +34,7 @@ import org.flowable.engine.history.HistoricProcessInstance;
 import org.flowable.engine.history.ProcessInstanceHistoryLog;
 import org.flowable.engine.repository.Deployment;
 import org.flowable.engine.repository.DeploymentBuilder;
+import org.flowable.engine.repository.ProcessDefinition;
 import org.flowable.engine.runtime.ProcessInstance;
 import org.flowable.engine.task.Comment;
 import org.flowable.identitylink.api.IdentityLink;
@@ -1902,4 +1903,53 @@ public class WFCoreService
 		});
 		return true;
 	}
+
+	/**
+	 * @param taskId 当前需要回退的节点
+	 * @return 回退上一个节点
+	 */
+	public boolean wfback(String system,String appname,String entity,String taskId) {
+		try {
+			Boolean flag = true;
+			String sourceRef = null;
+			Task task = taskService.createTaskQuery().taskId(taskId).singleResult();
+			String taskDefinitionKey = task.getTaskDefinitionKey();
+			if (taskDefinitionKey == null) {
+				log.debug("taskDefinitionKey不存在");
+				return false;
+			}
+			String processInstanceId = task.getProcessInstanceId();
+			if (processInstanceId == null) {
+				log.debug("processInstanceId不存在");
+				return false;
+			}
+			ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().processDefinitionId(task.getProcessDefinitionId()).singleResult();
+			BpmnModel bpmnModel = repositoryService.getBpmnModel(processDefinition.getId());
+			FlowNode flowNode = (FlowNode) bpmnModel.getFlowElement(task.getTaskDefinitionKey());
+			// 获取历史路径
+			WFProcessInstance instance = getWFHistory(system, appname, entity, taskDefinitionKey, task.getProcessInstanceId());
+			if (!ObjectUtils.isEmpty(flowNode) && !ObjectUtils.isEmpty(instance)) {
+				List<WFProcessNode> usertasks = new ArrayList((Collection<? extends WFProcessNode>) instance.getExtensionparams().get("usertasks"));
+				for (WFProcessNode node : usertasks) {
+					for (SequenceFlow flow : flowNode.getIncomingFlows()) {
+						if (node.getUsertaskid().equals(flow.getSourceRef())&&flow.getSourceRef().startsWith("tid")) {
+							sourceRef = flow.getSourceRef();
+							flag = false;
+							break;
+						}
+					}
+					if (!flag) {
+						break;
+					}
+				}
+			} else {
+				return false;
+			}
+			// 执行回退
+			runtimeService.createChangeActivityStateBuilder().processInstanceId(processInstanceId).moveActivityIdTo(taskDefinitionKey, sourceRef).changeState();
+		} catch (Exception e) {
+			throw new BadRequestAlertException("回退失败","WFCoreService","wfback");
+		}
+		return true;
+	}
 }