flowable获取流程节点的顺序数据

 /***     * 根据bpmnmodel获取流程节点的顺序信息     * @param processInstanceId     * @param taskList     * @param flowElements     * @param workflowRequestFormData     * @param curFlowElement     */    private void getTaskList(String processInstanceId, List<Object> taskList, Collection<FlowElement> flowElements, Map<String, Object> workflowRequestFormData, FlowElement curFlowElement) {        if (curFlowElement == null && taskList.size() == 0) {            // 获取第一个UserTask            FlowElement startElement = flowElements.stream().filter(flowElement -> flowElement instanceof StartEvent).collect(Collectors.toList()).get(0);            List<SequenceFlow> outgoingFlows = ((StartEvent) startElement).getOutgoingFlows();            String targetRef = outgoingFlows.get(0).getTargetRef();            // 根据ID找到FlowElement            FlowElement targetElementOfStartElement = getFlowElement(flowElements, targetRef);            if (targetElementOfStartElement instanceof UserTask) {                this.getTaskList(processInstanceId, taskList, flowElements, workflowRequestFormData, targetElementOfStartElement);            }        } else if (curFlowElement instanceof UserTask) {            // 只有Usertask才添加到列表中            taskList.add(curFlowElement);            String targetRef = "";            List<SequenceFlow> outgoingFlows = ((UserTask) curFlowElement).getOutgoingFlows();            if (outgoingFlows.size() == 1) {                targetRef = outgoingFlows.get(0).getTargetRef();            } else {                // 找到表达式成立的sequenceFlow的                SequenceFlow sequenceFlow = getSequenceFlow(workflowRequestFormData, outgoingFlows);                if (sequenceFlow != null) {                    targetRef = sequenceFlow.getTargetRef();                }            }            // 根据ID找到FlowElement            FlowElement targetElement = getFlowElement(flowElements, targetRef);            this.getTaskList(processInstanceId, taskList, flowElements, workflowRequestFormData, targetElement);        } else if (curFlowElement instanceof ExclusiveGateway) {            String targetRef = "";            // 如果为排他网关，获取符合条件的sequenceFlow的目标FlowElement            List<SequenceFlow> exclusiveGatewayOutgoingFlows = ((ExclusiveGateway) curFlowElement).getOutgoingFlows();            // 找到表达式成立的sequenceFlow的            SequenceFlow sequenceFlow = getSequenceFlow(workflowRequestFormData, exclusiveGatewayOutgoingFlows);            if (sequenceFlow != null) {                targetRef = sequenceFlow.getTargetRef();            }            // 根据ID找到FlowElement            FlowElement targetElement = getFlowElement(flowElements, targetRef);            this.getTaskList(processInstanceId, taskList, flowElements, workflowRequestFormData, targetElement);        }    }/***     * 根据ID找到FlowElement     * @param flowElements     * @param targetRef     * @return     */    private FlowElement getFlowElement(Collection<FlowElement> flowElements, String targetRef) {        List<FlowElement> targetFlowElements = flowElements.stream().filter(                flowElement -> !StringUtils.isEmpty(flowElement.getId()) && flowElement.getId().equals(targetRef)        ).collect(Collectors.toList());        if (targetFlowElements.size() > 0) {            return targetFlowElements.get(0);        }        return null;    }  /***     * 找到表达式成立的sequenceFlow的     * @param workflowRequestFormData     * @param outgoingFlows     * @return     */    private SequenceFlow getSequenceFlow(Map workflowRequestFormData, List<SequenceFlow> outgoingFlows) {        List<SequenceFlow> sequenceFlows = outgoingFlows.stream().filter(item -> {            Object execConditionExpressionResult = null;            boolean re = false;            try {                execConditionExpressionResult = this.getElValue(item.getConditionExpression(), workflowRequestFormData);            } catch (Exception e) {                e.printStackTrace();            }            if (execConditionExpressionResult.equals("true")) {                re = true;            }            return (Boolean) execConditionExpressionResult;        }).collect(Collectors.toList());        if (sequenceFlows.size() > 0) {            return sequenceFlows.get(0);        }        return null;    }