前面文正有寫過根據當前節點獲取下一個UseTask節點，有需要了解的可以去看這篇博客根據當前節點獲取下一個UseTask節點，，但是現在需求又發生了該表，如果在一個節點下需要獲取排他網關下所有的userTask怎么辦？
這里還需要將需求分成兩種
1、排他網關后面只有userTask，如下圖所示

這種情況，當到達財務審批時，需要財務選擇需要通過財務總監還是直接到發貨，由于財務后面的排他網關后面直接跟著兩個userTask，這時要獲取排他網關后面的userTask可以通過下面的代碼實現。

/*** 獲取排他網關的所有下一個UserTask* * @param activityImpl* @param processInstanceId* @return*/public Map<String, CandidateTaskInfo> getGateWayNextTaskInfo(String processInstanceId) {ProcessDefinitionEntity processDefinitionEntity = null;String id = null;// 獲取流程發布Id信息String definitionId = runtimeService.createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult().getProcessDefinitionId();processDefinitionEntity = (ProcessDefinitionEntity) ((RepositoryServiceImpl) repositoryService).getDeployedProcessDefinition(definitionId);ExecutionEntity execution = (ExecutionEntity) runtimeService.createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();// 當前流程節點Id信息String activitiId = execution.getActivityId();// 獲取流程所有節點信息List<ActivityImpl> activitiList = processDefinitionEntity.getActivities();Map<String, CandidateTaskInfo> map = null;// 遍歷所有節點信息for (ActivityImpl activityImpl : activitiList) {id = activityImpl.getId();if (activitiId.equals(id)) {map = getGateWay(activityImpl);break;}}return map;}/*** 獲取排他網關的所有分支信息* @param activityImpl* @return*/public Map<String, CandidateTaskInfo> getGateWay(ActivityImpl activityImpl) {Map<String, CandidateTaskInfo> maps = new HashMap<String, CandidateTaskInfo>();// 獲取節點所有流向線路信息List<PvmTransition> outTransitions = activityImpl.getOutgoingTransitions();List<PvmTransition> outTransitionsTemp = null;for (PvmTransition tr : outTransitions) {PvmActivity ac = tr.getDestination(); // 獲取線路的終點節點// 如果流向線路為排他網關if ("exclusiveGateway".equals(ac.getProperty("type"))) {outTransitionsTemp = ac.getOutgoingTransitions();// 如果排他網關只有一條線路信息if (outTransitionsTemp.size() == 1) {String s = (String) outTransitions.get(0).getProperty("conditionText");String name = (String) outTransitions.get(0).getDestination().getProperty("name");String taskId = (String) outTransitions.get(0).getDestination().getId();maps.put(s, new CandidateTaskInfo(name, taskId));} else if (outTransitionsTemp.size() > 1) { // 如果排他網關有多條線路信息for (PvmTransition tr1 : outTransitionsTemp) {String s = (String)tr1.getProperty("conditionText");String name = (String) tr1.getDestination().getProperty("name");String taskId = (String) tr1.getDestination().getId();String str = s.split("==")[1];if(StringUtils.contains(str, "\'")||StringUtils.contains(str, "\"")) {// =='xxxx'或者=="xxxx"maps.put(str.substring(1, str.length()-2), new CandidateTaskInfo(name, taskId));}else {// == true or falsemaps.put(str.substring(0, str.length()-1), new CandidateTaskInfo(name, taskId));}}}}}return maps;}

第一種情形使用這種方法可以解決。
2、排他網關除了userTask還有排他網關，怎么正確獲取當前節點后面的userTask？如下圖所示：

這種情形就需要在方案一的條件下進行修改，當遇到排他網關是，在獲取排他網關下一個userTask，參考前面的博文。
代碼：

/*** 下一個任務節點信息,* * 如果下一個節點為用戶任務則直接返回,* * 如果下一個節點為排他網關, 獲取排他網關Id信息, 根據排他網關Id信息和execution獲取流程實例排他網關Id為key的變量值,* 根據變量值分別執行排他網關后線路中的el表達式, 并找到el表達式通過的線路后的用戶任務* * @param ActivityImpl* activityImpl 流程節點信息* @param String* activityId 當前流程節點Id信息* @param String* elString 排他網關順序流線段判斷條件* @param String* processInstanceId 流程實例Id信息* @return*/public TaskDefinition nextTaskDefinition(ActivityImpl activityImpl, String activityId, String elString,String processInstanceId) {PvmActivity ac = null;Object s = null;// 如果遍歷節點為用戶任務并且節點不是當前節點信息if ("userTask".equals(activityImpl.getProperty("type")) && !activityId.equals(activityImpl.getId())) {// 獲取該節點下一個節點信息TaskDefinition taskDefinition = ((UserTaskActivityBehavior) activityImpl.getActivityBehavior()).getTaskDefinition();return taskDefinition;} else if ("exclusiveGateway".equals(activityImpl.getProperty("type"))) {// 當前節點為exclusiveGatewayList<PvmTransition> outTransitions = activityImpl.getOutgoingTransitions();// 獲取流程啟動時設置的網關判斷條件信息elString = getGatewayCondition(activityImpl.getId(), processInstanceId);// 如果排他網關只有一條線路信息if (outTransitions.size() == 1) {return nextTaskDefinition((ActivityImpl) outTransitions.get(0).getDestination(), activityId, elString,processInstanceId);} else if (outTransitions.size() > 1) { // 如果排他網關有多條線路信息for (PvmTransition tr1 : outTransitions) {s = tr1.getProperty("conditionText"); // 獲取排他網關線路判斷條件信息// 判斷el表達式是否成立if (isCondition(activityImpl.getId(), StringUtils.trim(s.toString()), elString)) {return nextTaskDefinition((ActivityImpl) tr1.getDestination(), activityId, elString,processInstanceId);}}}} else {// 獲取節點所有流向線路信息List<PvmTransition> outTransitions = activityImpl.getOutgoingTransitions();List<PvmTransition> outTransitionsTemp = null;for (PvmTransition tr : outTransitions) {ac = tr.getDestination(); // 獲取線路的終點節點// 如果流向線路為排他網關if ("exclusiveGateway".equals(ac.getProperty("type"))) {outTransitionsTemp = ac.getOutgoingTransitions();// 如果網關路線判斷條件為空信息if (StringUtils.isEmpty(elString)) {// 獲取流程啟動時設置的網關判斷條件信息elString = getGatewayCondition(ac.getId(), processInstanceId);}// 如果排他網關只有一條線路信息if (outTransitionsTemp.size() == 1) {return nextTaskDefinition((ActivityImpl) outTransitionsTemp.get(0).getDestination(), activityId,elString, processInstanceId);} else if (outTransitionsTemp.size() > 1) { // 如果排他網關有多條線路信息for (PvmTransition tr1 : outTransitionsTemp) {s = tr1.getProperty("conditionText"); // 獲取排他網關線路判斷條件信息// 判斷el表達式是否成立if (isCondition(ac.getId(), StringUtils.trim(s.toString()), elString)) {return nextTaskDefinition((ActivityImpl) tr1.getDestination(), activityId, elString,processInstanceId);}}}} else if ("userTask".equals(ac.getProperty("type"))) {try {return ((UserTaskActivityBehavior) ((ActivityImpl) ac).getActivityBehavior()).getTaskDefinition();} catch (Exception e) {return null;}} else {}}return null;}return null;}/*** 查詢流程啟動時設置排他網關判斷條件信息* * @param String* gatewayId 排他網關Id信息, 流程啟動時設置網關路線判斷條件key為網關Id信息* @param String* processInstanceId 流程實例Id信息* @return*/public String getGatewayCondition(String gatewayId, String processInstanceId) {Execution execution = runtimeService.createExecutionQuery().processInstanceId(processInstanceId).singleResult();Object object = runtimeService.getVariable(execution.getId(), gatewayId);return object == null ? "" : object.toString();}/*** 根據key和value判斷el表達式是否通過信息* * @param String* key el表達式key信息* @param String* el el表達式信息* @param String* value el表達式傳入值信息* @return*/public boolean isCondition(String key, String el, String value) {ExpressionFactory factory = new ExpressionFactoryImpl();SimpleContext context = new SimpleContext();context.setVariable(key, factory.createValueExpression(value, String.class));ValueExpression e = factory.createValueExpression(context, el, boolean.class);return (Boolean) e.getValue(context);}/*** 獲取排他網關的所有下一個UserTask* * @param activityImpl* @param processInstanceId* @return*/public Map<String, CandidateTaskInfo> getGateWayNextTaskInfo(String processInstanceId) {ProcessDefinitionEntity processDefinitionEntity = null;String id = null;// 獲取流程發布Id信息String definitionId = runtimeService.createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult().getProcessDefinitionId();processDefinitionEntity = (ProcessDefinitionEntity) ((RepositoryServiceImpl) repositoryService).getDeployedProcessDefinition(definitionId);ExecutionEntity execution = (ExecutionEntity) runtimeService.createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();// 當前流程節點Id信息String activitiId = execution.getActivityId();// 獲取流程所有節點信息List<ActivityImpl> activitiList = processDefinitionEntity.getActivities();Map<String, CandidateTaskInfo> map = null;// 遍歷所有節點信息for (ActivityImpl activityImpl : activitiList) {id = activityImpl.getId();if (activitiId.equals(id)) {map = getGateWay(activityImpl,processInstanceId, activitiId);break;}}return map;}/*** 獲取排他網關的所有分支信息* @param activityImpl* @return*/public Map<String, CandidateTaskInfo> getGateWay(ActivityImpl activityImpl,String processInstanceId,String activityId) {Map<String, CandidateTaskInfo> maps = new HashMap<String, CandidateTaskInfo>();// 獲取節點所有流向線路信息List<PvmTransition> outTransitions = activityImpl.getOutgoingTransitions();List<PvmTransition> outTransitionsTemp = null;for (PvmTransition tr : outTransitions) {PvmActivity ac = tr.getDestination(); // 獲取線路的終點節點// 如果流向線路為排他網關if ("exclusiveGateway".equals(ac.getProperty("type"))) {outTransitionsTemp = ac.getOutgoingTransitions();// 如果排他網關只有一條線路信息if (outTransitionsTemp.size() == 1) {String s = (String) outTransitions.get(0).getProperty("conditionText");String name = (String) outTransitions.get(0).getDestination().getProperty("name");String taskId = (String) outTransitions.get(0).getDestination().getId();maps.put(s, new CandidateTaskInfo(name, taskId));} else if (outTransitionsTemp.size() > 1) { // 如果排他網關有多條線路信息for (PvmTransition tr1 : outTransitionsTemp) {String s = (String)tr1.getProperty("conditionText");String str = s.split("==")[1];String name = (String) tr1.getDestination().getProperty("name");String taskId = (String) tr1.getDestination().getId();// 下一個還是排他網關if("exclusiveGateway".equals(tr1.getDestination().getProperty("type"))){// 獲取下一個UserTaskactivityId = ((ActivityImpl) tr1.getDestination()).getId();TaskDefinition taskDefinition = nextTaskDefinition((ActivityImpl) tr1.getDestination(), activityId, s, processInstanceId);if(null != taskDefinition){name = taskDefinition.getNameExpression().getExpressionText();taskId = taskDefinition.getKey();}else {// 流程后面不存在UserTask節點了name="結束";taskId=ActivityUtil.getEndActivitiId(processInstanceId);}}// 這里處理的是el表達式為=='xxxx'或者=="xxxx",也可以繼續擴展其他方式if(StringUtils.contains(str, "\'")||StringUtils.contains(str, "\"")) {// maps.put(str.substring(1, str.length()-2), new CandidateTaskInfo(name, taskId));}else {// == true or falsemaps.put(str.substring(0, str.length()-1), new CandidateTaskInfo(name, taskId));}}}}}return maps;}

雖然方案一可以解決一部分問題，但是還是推薦使用方案二。

總結

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