xm
2024-06-14 722af26bc6fec32bb289b1df51a9016a4935610f
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package com.dl.flowable.flow;
 
import cn.hutool.core.util.ObjectUtil;
import com.dl.common.exception.ServiceException;
import lombok.extern.slf4j.Slf4j;
import org.flowable.bpmn.model.*;
import org.flowable.engine.impl.bpmn.behavior.ParallelMultiInstanceBehavior;
import org.flowable.engine.impl.bpmn.behavior.SequentialMultiInstanceBehavior;
import org.flowable.task.api.history.HistoricTaskInstance;
 
import java.util.*;
 
/**
 * @author XuanXuan
 * @date 2021-04-03 23:57
 */
@Slf4j
public class FlowableUtils {
 
    /**
     * 根据节点,获取入口连线
     * @param source
     * @return
     */
    public static List<SequenceFlow> getElementIncomingFlows(FlowElement source) {
        List<SequenceFlow> sequenceFlows = null;
        if (source instanceof FlowNode) {
            sequenceFlows = ((FlowNode) source).getIncomingFlows();
        } else if (source instanceof Gateway) {
            sequenceFlows = ((Gateway) source).getIncomingFlows();
        } else if (source instanceof SubProcess) {
            sequenceFlows = ((SubProcess) source).getIncomingFlows();
        } else if (source instanceof StartEvent) {
            sequenceFlows = ((StartEvent) source).getIncomingFlows();
        } else if (source instanceof EndEvent) {
            sequenceFlows = ((EndEvent) source).getIncomingFlows();
        }
        return sequenceFlows;
    }
 
    /**
     * 根据节点,获取出口连线
     * @param source
     * @return
     */
    public static List<SequenceFlow> getElementOutgoingFlows(FlowElement source) {
        List<SequenceFlow> sequenceFlows = null;
        if (source instanceof FlowNode) {
            sequenceFlows = ((FlowNode) source).getOutgoingFlows();
        } else if (source instanceof Gateway) {
            sequenceFlows = ((Gateway) source).getOutgoingFlows();
        } else if (source instanceof SubProcess) {
            sequenceFlows = ((SubProcess) source).getOutgoingFlows();
        } else if (source instanceof StartEvent) {
            sequenceFlows = ((StartEvent) source).getOutgoingFlows();
        } else if (source instanceof EndEvent) {
            sequenceFlows = ((EndEvent) source).getOutgoingFlows();
        }
        return sequenceFlows;
    }
 
    /**
     * 获取全部节点列表,包含子流程节点
     * @param flowElements
     * @param allElements
     * @return
     */
    public static Collection<FlowElement> getAllElements(Collection<FlowElement> flowElements, Collection<FlowElement> allElements) {
        allElements = allElements == null ? new ArrayList<>() : allElements;
 
        for (FlowElement flowElement : flowElements) {
            allElements.add(flowElement);
            if (flowElement instanceof SubProcess) {
                // 继续深入子流程,进一步获取子流程
                allElements = FlowableUtils.getAllElements(((SubProcess) flowElement).getFlowElements(), allElements);
            }
        }
        return allElements;
    }
 
    /**
     * 迭代获取父级任务节点列表,向前找
     * @param source 起始节点
     * @param hasSequenceFlow 已经经过的连线的 ID,用于判断线路是否重复
     * @param userTaskList 已找到的用户任务节点
     * @return
     */
    public static List<UserTask> iteratorFindParentUserTasks(FlowElement source, Set<String> hasSequenceFlow, List<UserTask> userTaskList) {
        userTaskList = userTaskList == null ? new ArrayList<>() : userTaskList;
        hasSequenceFlow = hasSequenceFlow == null ? new HashSet<>() : hasSequenceFlow;
 
        // 如果该节点为开始节点,且存在上级子节点,则顺着上级子节点继续迭代
        if (source instanceof StartEvent && source.getSubProcess() != null) {
            userTaskList = iteratorFindParentUserTasks(source.getSubProcess(), hasSequenceFlow, userTaskList);
        }
 
        // 根据类型,获取入口连线
        List<SequenceFlow> sequenceFlows = getElementIncomingFlows(source);
 
        if (sequenceFlows != null) {
            // 循环找到目标元素
            for (SequenceFlow sequenceFlow: sequenceFlows) {
                // 如果发现连线重复,说明循环了,跳过这个循环
                if (hasSequenceFlow.contains(sequenceFlow.getId())) {
                    continue;
                }
                // 添加已经走过的连线
                hasSequenceFlow.add(sequenceFlow.getId());
                // 类型为用户节点,则新增父级节点
                if (sequenceFlow.getSourceFlowElement() instanceof UserTask) {
                    userTaskList.add((UserTask) sequenceFlow.getSourceFlowElement());
                    continue;
                }
                // 类型为子流程,则添加子流程开始节点出口处相连的节点
                if (sequenceFlow.getSourceFlowElement() instanceof SubProcess) {
                    // 获取子流程用户任务节点
                    List<UserTask> childUserTaskList = findChildProcessUserTasks((StartEvent) ((SubProcess) sequenceFlow.getSourceFlowElement()).getFlowElements().toArray()[0], null, null);
                    // 如果找到节点,则说明该线路找到节点,不继续向下找,反之继续
                    if (childUserTaskList != null && childUserTaskList.size() > 0) {
                        userTaskList.addAll(childUserTaskList);
                        continue;
                    }
                }
                // 继续迭代
                userTaskList = iteratorFindParentUserTasks(sequenceFlow.getSourceFlowElement(), hasSequenceFlow, userTaskList);
            }
        }
        return userTaskList;
    }
 
    /**
     * 根据正在运行的任务节点,迭代获取子级任务节点列表,向后找
     * @param source 起始节点
     * @param runTaskKeyList 正在运行的任务 Key,用于校验任务节点是否是正在运行的节点
     * @param hasSequenceFlow 已经经过的连线的 ID,用于判断线路是否重复
     * @param userTaskList 需要撤回的用户任务列表
     * @return
     */
    public static List<UserTask> iteratorFindChildUserTasks(FlowElement source, List<String> runTaskKeyList, Set<String> hasSequenceFlow, List<UserTask> userTaskList) {
        hasSequenceFlow = hasSequenceFlow == null ? new HashSet<>() : hasSequenceFlow;
        userTaskList = userTaskList == null ? new ArrayList<>() : userTaskList;
 
        // 如果该节点为开始节点,且存在上级子节点,则顺着上级子节点继续迭代
        if (source instanceof StartEvent && source.getSubProcess() != null) {
            userTaskList = iteratorFindChildUserTasks(source.getSubProcess(), runTaskKeyList, hasSequenceFlow, userTaskList);
        }
 
        // 根据类型,获取出口连线
        List<SequenceFlow> sequenceFlows = getElementOutgoingFlows(source);
 
        if (sequenceFlows != null) {
            // 循环找到目标元素
            for (SequenceFlow sequenceFlow: sequenceFlows) {
                // 如果发现连线重复,说明循环了,跳过这个循环
                if (hasSequenceFlow.contains(sequenceFlow.getId())) {
                    continue;
                }
                // 添加已经走过的连线
                hasSequenceFlow.add(sequenceFlow.getId());
                // 如果为用户任务类型,且任务节点的 Key 正在运行的任务中存在,添加
                if (sequenceFlow.getTargetFlowElement() instanceof UserTask && runTaskKeyList.contains((sequenceFlow.getTargetFlowElement()).getId())) {
                    userTaskList.add((UserTask) sequenceFlow.getTargetFlowElement());
                    continue;
                }
                // 如果节点为子流程节点情况,则从节点中的第一个节点开始获取
                if (sequenceFlow.getTargetFlowElement() instanceof SubProcess) {
                    List<UserTask> childUserTaskList = iteratorFindChildUserTasks((FlowElement) (((SubProcess) sequenceFlow.getTargetFlowElement()).getFlowElements().toArray()[0]), runTaskKeyList, hasSequenceFlow, null);
                    // 如果找到节点,则说明该线路找到节点,不继续向下找,反之继续
                    if (childUserTaskList != null && childUserTaskList.size() > 0) {
                        userTaskList.addAll(childUserTaskList);
                        continue;
                    }
                }
                // 继续迭代
                userTaskList = iteratorFindChildUserTasks(sequenceFlow.getTargetFlowElement(), runTaskKeyList, hasSequenceFlow, userTaskList);
            }
        }
        return userTaskList;
    }
 
    /**
     * 迭代获取子流程用户任务节点
     * @param source 起始节点
     * @param hasSequenceFlow 已经经过的连线的 ID,用于判断线路是否重复
     * @param userTaskList 需要撤回的用户任务列表
     * @return
     */
    public static List<UserTask> findChildProcessUserTasks(FlowElement source, Set<String> hasSequenceFlow, List<UserTask> userTaskList) {
        hasSequenceFlow = hasSequenceFlow == null ? new HashSet<>() : hasSequenceFlow;
        userTaskList = userTaskList == null ? new ArrayList<>() : userTaskList;
 
        // 根据类型,获取出口连线
        List<SequenceFlow> sequenceFlows = getElementOutgoingFlows(source);
 
        if (sequenceFlows != null) {
            // 循环找到目标元素
            for (SequenceFlow sequenceFlow: sequenceFlows) {
                // 如果发现连线重复,说明循环了,跳过这个循环
                if (hasSequenceFlow.contains(sequenceFlow.getId())) {
                    continue;
                }
                // 添加已经走过的连线
                hasSequenceFlow.add(sequenceFlow.getId());
                // 如果为用户任务类型,且任务节点的 Key 正在运行的任务中存在,添加
                if (sequenceFlow.getTargetFlowElement() instanceof UserTask) {
                    userTaskList.add((UserTask) sequenceFlow.getTargetFlowElement());
                    continue;
                }
                // 如果节点为子流程节点情况,则从节点中的第一个节点开始获取
                if (sequenceFlow.getTargetFlowElement() instanceof SubProcess) {
                    List<UserTask> childUserTaskList = findChildProcessUserTasks((FlowElement) (((SubProcess) sequenceFlow.getTargetFlowElement()).getFlowElements().toArray()[0]), hasSequenceFlow, null);
                    // 如果找到节点,则说明该线路找到节点,不继续向下找,反之继续
                    if (childUserTaskList != null && childUserTaskList.size() > 0) {
                        userTaskList.addAll(childUserTaskList);
                        continue;
                    }
                }
                // 继续迭代
                userTaskList = findChildProcessUserTasks(sequenceFlow.getTargetFlowElement(), hasSequenceFlow, userTaskList);
            }
        }
        return userTaskList;
    }
 
    /**
     * 从后向前寻路,获取所有脏线路上的点
     * @param source 起始节点
     * @param passRoads 已经经过的点集合
     * @param hasSequenceFlow 已经经过的连线的 ID,用于判断线路是否重复
     * @param targets 目标脏线路终点
     * @param dirtyRoads 确定为脏数据的点,因为不需要重复,因此使用 set 存储
     * @return
     */
    public static Set<String> iteratorFindDirtyRoads(FlowElement source, List<String> passRoads, Set<String> hasSequenceFlow, List<String> targets, Set<String> dirtyRoads) {
        passRoads = passRoads == null ? new ArrayList<>() : passRoads;
        dirtyRoads = dirtyRoads == null ? new HashSet<>() : dirtyRoads;
        hasSequenceFlow = hasSequenceFlow == null ? new HashSet<>() : hasSequenceFlow;
 
        // 如果该节点为开始节点,且存在上级子节点,则顺着上级子节点继续迭代
        if (source instanceof StartEvent && source.getSubProcess() != null) {
            dirtyRoads = iteratorFindDirtyRoads(source.getSubProcess(), passRoads, hasSequenceFlow, targets, dirtyRoads);
        }
 
        // 根据类型,获取入口连线
        List<SequenceFlow> sequenceFlows = getElementIncomingFlows(source);
 
        if (sequenceFlows != null) {
            // 循环找到目标元素
            for (SequenceFlow sequenceFlow: sequenceFlows) {
                // 如果发现连线重复,说明循环了,跳过这个循环
                if (hasSequenceFlow.contains(sequenceFlow.getId())) {
                    continue;
                }
                // 添加已经走过的连线
                hasSequenceFlow.add(sequenceFlow.getId());
                // 新增经过的路线
                passRoads.add(sequenceFlow.getSourceFlowElement().getId());
                // 如果此点为目标点,确定经过的路线为脏线路,添加点到脏线路中,然后找下个连线
                if (targets.contains(sequenceFlow.getSourceFlowElement().getId())) {
                    dirtyRoads.addAll(passRoads);
                    continue;
                }
                // 如果该节点为开始节点,且存在上级子节点,则顺着上级子节点继续迭代
                if (sequenceFlow.getSourceFlowElement() instanceof SubProcess) {
                    dirtyRoads = findChildProcessAllDirtyRoad((StartEvent) ((SubProcess) sequenceFlow.getSourceFlowElement()).getFlowElements().toArray()[0], null, dirtyRoads);
                    // 是否存在子流程上,true 是,false 否
                    Boolean isInChildProcess = dirtyTargetInChildProcess((StartEvent) ((SubProcess) sequenceFlow.getSourceFlowElement()).getFlowElements().toArray()[0], null, targets, null);
                    if (isInChildProcess) {
                        // 已在子流程上找到,该路线结束
                        continue;
                    }
                }
                // 继续迭代
                dirtyRoads = iteratorFindDirtyRoads(sequenceFlow.getSourceFlowElement(), passRoads, hasSequenceFlow, targets, dirtyRoads);
            }
        }
        return dirtyRoads;
    }
 
    /**
     * 迭代获取子流程脏路线
     * 说明,假如回退的点就是子流程,那么也肯定会回退到子流程最初的用户任务节点,因此子流程中的节点全是脏路线
     * @param source 起始节点
     * @param hasSequenceFlow 已经经过的连线的 ID,用于判断线路是否重复
     * @param dirtyRoads 确定为脏数据的点,因为不需要重复,因此使用 set 存储
     * @return
     */
    public static Set<String> findChildProcessAllDirtyRoad(FlowElement source, Set<String> hasSequenceFlow, Set<String> dirtyRoads) {
        hasSequenceFlow = hasSequenceFlow == null ? new HashSet<>() : hasSequenceFlow;
        dirtyRoads = dirtyRoads == null ? new HashSet<>() : dirtyRoads;
 
        // 根据类型,获取出口连线
        List<SequenceFlow> sequenceFlows = getElementOutgoingFlows(source);
 
        if (sequenceFlows != null) {
            // 循环找到目标元素
            for (SequenceFlow sequenceFlow: sequenceFlows) {
                // 如果发现连线重复,说明循环了,跳过这个循环
                if (hasSequenceFlow.contains(sequenceFlow.getId())) {
                    continue;
                }
                // 添加已经走过的连线
                hasSequenceFlow.add(sequenceFlow.getId());
                // 添加脏路线
                dirtyRoads.add(sequenceFlow.getTargetFlowElement().getId());
                // 如果节点为子流程节点情况,则从节点中的第一个节点开始获取
                if (sequenceFlow.getTargetFlowElement() instanceof SubProcess) {
                    dirtyRoads = findChildProcessAllDirtyRoad((FlowElement) (((SubProcess) sequenceFlow.getTargetFlowElement()).getFlowElements().toArray()[0]), hasSequenceFlow, dirtyRoads);
                }
                // 继续迭代
                dirtyRoads = findChildProcessAllDirtyRoad(sequenceFlow.getTargetFlowElement(), hasSequenceFlow, dirtyRoads);
            }
        }
        return dirtyRoads;
    }
 
    /**
     * 判断脏路线结束节点是否在子流程上
     * @param source 起始节点
     * @param hasSequenceFlow 已经经过的连线的 ID,用于判断线路是否重复
     * @param targets 判断脏路线节点是否存在子流程上,只要存在一个,说明脏路线只到子流程为止
     * @param inChildProcess 是否存在子流程上,true 是,false 否
     * @return
     */
    public static Boolean dirtyTargetInChildProcess(FlowElement source, Set<String> hasSequenceFlow, List<String> targets, Boolean inChildProcess) {
        hasSequenceFlow = hasSequenceFlow == null ? new HashSet<>() : hasSequenceFlow;
        inChildProcess = inChildProcess == null ? false : inChildProcess;
 
        // 根据类型,获取出口连线
        List<SequenceFlow> sequenceFlows = getElementOutgoingFlows(source);
 
        if (sequenceFlows != null && !inChildProcess) {
            // 循环找到目标元素
            for (SequenceFlow sequenceFlow: sequenceFlows) {
                // 如果发现连线重复,说明循环了,跳过这个循环
                if (hasSequenceFlow.contains(sequenceFlow.getId())) {
                    continue;
                }
                // 添加已经走过的连线
                hasSequenceFlow.add(sequenceFlow.getId());
                // 如果发现目标点在子流程上存在,说明只到子流程为止
                if (targets.contains(sequenceFlow.getTargetFlowElement().getId())) {
                    inChildProcess = true;
                    break;
                }
                // 如果节点为子流程节点情况,则从节点中的第一个节点开始获取
                if (sequenceFlow.getTargetFlowElement() instanceof SubProcess) {
                    inChildProcess = dirtyTargetInChildProcess((FlowElement) (((SubProcess) sequenceFlow.getTargetFlowElement()).getFlowElements().toArray()[0]), hasSequenceFlow, targets, inChildProcess);
                }
                // 继续迭代
                inChildProcess = dirtyTargetInChildProcess(sequenceFlow.getTargetFlowElement(), hasSequenceFlow, targets, inChildProcess);
            }
        }
        return inChildProcess;
    }
 
    /**
     * 迭代从后向前扫描,判断目标节点相对于当前节点是否是串行
     * 不存在直接回退到子流程中的情况,但存在从子流程出去到父流程情况
     * @param source 起始节点
     * @param isSequential 是否串行
     * @param hasSequenceFlow 已经经过的连线的 ID,用于判断线路是否重复
     * @param targetKsy 目标节点
     * @return
     */
    public static Boolean iteratorCheckSequentialReferTarget(FlowElement source, String targetKsy, Set<String> hasSequenceFlow, Boolean isSequential) {
        isSequential = isSequential == null ? true : isSequential;
        hasSequenceFlow = hasSequenceFlow == null ? new HashSet<>() : hasSequenceFlow;
 
        // 如果该节点为开始节点,且存在上级子节点,则顺着上级子节点继续迭代
        if (source instanceof StartEvent && source.getSubProcess() != null) {
            isSequential = iteratorCheckSequentialReferTarget(source.getSubProcess(), targetKsy, hasSequenceFlow, isSequential);
        }
 
        // 根据类型,获取入口连线
        List<SequenceFlow> sequenceFlows = getElementIncomingFlows(source);
 
        if (sequenceFlows != null) {
            // 循环找到目标元素
            for (SequenceFlow sequenceFlow: sequenceFlows) {
                // 如果发现连线重复,说明循环了,跳过这个循环
                if (hasSequenceFlow.contains(sequenceFlow.getId())) {
                    continue;
                }
                // 添加已经走过的连线
                hasSequenceFlow.add(sequenceFlow.getId());
                // 如果目标节点已被判断为并行,后面都不需要执行,直接返回
                if (isSequential == false) {
                    break;
                }
                // 这条线路存在目标节点,这条线路完成,进入下个线路
                if (targetKsy.equals(sequenceFlow.getSourceFlowElement().getId())) {
                    continue;
                }
                if (sequenceFlow.getSourceFlowElement() instanceof StartEvent) {
                    isSequential = false;
                    break;
                }
                // 否则就继续迭代
                isSequential = iteratorCheckSequentialReferTarget(sequenceFlow.getSourceFlowElement(), targetKsy, hasSequenceFlow, isSequential);
            }
        }
        return isSequential;
    }
 
    /**
     * 从后向前寻路,获取到达节点的所有路线
     * 不存在直接回退到子流程,但是存在回退到父级流程的情况
     * @param source 起始节点
     * @param passRoads 已经经过的点集合
     * @param roads 路线
     * @return
     */
    public static List<List<UserTask>> findRoad(FlowElement source, List<UserTask> passRoads, Set<String> hasSequenceFlow, List<List<UserTask>> roads) {
        passRoads = passRoads == null ? new ArrayList<>() : passRoads;
        roads = roads == null ? new ArrayList<>() : roads;
        hasSequenceFlow = hasSequenceFlow == null ? new HashSet<>() : hasSequenceFlow;
 
        // 如果该节点为开始节点,且存在上级子节点,则顺着上级子节点继续迭代
        if (source instanceof StartEvent && source.getSubProcess() != null) {
            roads = findRoad(source.getSubProcess(), passRoads, hasSequenceFlow, roads);
        }
 
        // 根据类型,获取入口连线
        List<SequenceFlow> sequenceFlows = getElementIncomingFlows(source);
 
        if (sequenceFlows != null && sequenceFlows.size() != 0) {
            for (SequenceFlow sequenceFlow: sequenceFlows) {
                // 如果发现连线重复,说明循环了,跳过这个循环
                if (hasSequenceFlow.contains(sequenceFlow.getId())) {
                    continue;
                }
                // 添加已经走过的连线
                hasSequenceFlow.add(sequenceFlow.getId());
                // 添加经过路线
                if (sequenceFlow.getSourceFlowElement() instanceof UserTask) {
                    passRoads.add((UserTask) sequenceFlow.getSourceFlowElement());
                }
                // 继续迭代
                roads = findRoad(sequenceFlow.getSourceFlowElement(), passRoads, hasSequenceFlow, roads);
            }
        } else {
            // 添加路线
            roads.add(passRoads);
        }
        return roads;
    }
 
    /**
     * 历史节点数据清洗,清洗掉又回滚导致的脏数据
     * @param allElements 全部节点信息
     * @param historicTaskInstanceList 历史任务实例信息,数据采用开始时间升序
     * @return
     */
    public static List<String> historicTaskInstanceClean(Collection<FlowElement> allElements, List<HistoricTaskInstance> historicTaskInstanceList) {
        // 会签节点收集
        List<String> multiTask = new ArrayList<>();
        allElements.forEach(flowElement -> {
            if (flowElement instanceof UserTask) {
                // 如果该节点的行为为会签行为,说明该节点为会签节点
                if (((UserTask) flowElement).getBehavior() instanceof ParallelMultiInstanceBehavior || ((UserTask) flowElement).getBehavior() instanceof SequentialMultiInstanceBehavior) {
                    multiTask.add(flowElement.getId());
                }
            }
        });
        // 循环放入栈,栈 LIFO:后进先出
        Stack<HistoricTaskInstance> stack = new Stack<>();
        historicTaskInstanceList.forEach(item -> stack.push(item));
        // 清洗后的历史任务实例
        List<String> lastHistoricTaskInstanceList = new ArrayList<>();
        // 网关存在可能只走了部分分支情况,且还存在跳转废弃数据以及其他分支数据的干扰,因此需要对历史节点数据进行清洗
        // 临时用户任务 key
        StringBuilder userTaskKey = null;
        // 临时被删掉的任务 key,存在并行情况
        List<String> deleteKeyList = new ArrayList<>();
        // 临时脏数据线路
        List<Set<String>> dirtyDataLineList = new ArrayList<>();
        // 由某个点跳到会签点,此时出现多个会签实例对应 1 个跳转情况,需要把这些连续脏数据都找到
        // 会签特殊处理下标
        int multiIndex = -1;
        // 会签特殊处理 key
        StringBuilder multiKey = null;
        // 会签特殊处理操作标识
        boolean multiOpera = false;
        while (!stack.empty()) {
            // 从这里开始 userTaskKey 都还是上个栈的 key
            // 是否是脏数据线路上的点
            final boolean[] isDirtyData = {false};
            for (Set<String> oldDirtyDataLine : dirtyDataLineList) {
                if (oldDirtyDataLine.contains(stack.peek().getTaskDefinitionKey())) {
                    isDirtyData[0] = true;
                }
            }
            // 删除原因不为空,说明从这条数据开始回跳或者回退的
            // MI_END:会签完成后,其他未签到节点的删除原因,不在处理范围内
            if (stack.peek().getDeleteReason() != null && !stack.peek().getDeleteReason().equals("MI_END")) {
                // 可以理解为脏线路起点
                String dirtyPoint = "";
                if (stack.peek().getDeleteReason().indexOf("Change activity to ") >= 0) {
                    dirtyPoint = stack.peek().getDeleteReason().replace("Change activity to ", "");
                }
                // 会签回退删除原因有点不同
                if (stack.peek().getDeleteReason().indexOf("Change parent activity to ") >= 0) {
                    dirtyPoint = stack.peek().getDeleteReason().replace("Change parent activity to ", "");
                }
                FlowElement dirtyTask = null;
                // 获取变更节点的对应的入口处连线
                // 如果是网关并行回退情况,会变成两条脏数据路线,效果一样
                for (FlowElement flowElement : allElements) {
                    if (flowElement.getId().equals(stack.peek().getTaskDefinitionKey())) {
                        dirtyTask = flowElement;
                    }
                }
                // 获取脏数据线路
                Set<String> dirtyDataLine = FlowableUtils.iteratorFindDirtyRoads(dirtyTask, null, null, Arrays.asList(dirtyPoint.split(",")), null);
                // 自己本身也是脏线路上的点,加进去
                dirtyDataLine.add(stack.peek().getTaskDefinitionKey());
                log.info(stack.peek().getTaskDefinitionKey() + "点脏路线集合:" + dirtyDataLine);
                // 是全新的需要添加的脏线路
                boolean isNewDirtyData = true;
                for (int i = 0; i < dirtyDataLineList.size(); i++) {
                    // 如果发现他的上个节点在脏线路内,说明这个点可能是并行的节点,或者连续驳回
                    // 这时,都以之前的脏线路节点为标准,只需合并脏线路即可,也就是路线补全
                    if (dirtyDataLineList.get(i).contains(userTaskKey.toString())) {
                        isNewDirtyData = false;
                        dirtyDataLineList.get(i).addAll(dirtyDataLine);
                    }
                }
                // 已确定时全新的脏线路
                if (isNewDirtyData) {
                    // deleteKey 单一路线驳回到并行,这种同时生成多个新实例记录情况,这时 deleteKey 其实是由多个值组成
                    // 按照逻辑,回退后立刻生成的实例记录就是回退的记录
                    // 至于驳回所生成的 Key,直接从删除原因中获取,因为存在驳回到并行的情况
                    deleteKeyList.add(dirtyPoint + ",");
                    dirtyDataLineList.add(dirtyDataLine);
                }
                // 添加后,现在这个点变成脏线路上的点了
                isDirtyData[0] = true;
            }
            // 如果不是脏线路上的点,说明是有效数据,添加历史实例 Key
            if (!isDirtyData[0]) {
                lastHistoricTaskInstanceList.add(stack.peek().getTaskDefinitionKey());
            }
            // 校验脏线路是否结束
            for (int i = 0; i < deleteKeyList.size(); i ++) {
                // 如果发现脏数据属于会签,记录下下标与对应 Key,以备后续比对,会签脏数据范畴开始
                if (multiKey == null && multiTask.contains(stack.peek().getTaskDefinitionKey())
                        && deleteKeyList.get(i).contains(stack.peek().getTaskDefinitionKey())) {
                    multiIndex = i;
                    multiKey = new StringBuilder(stack.peek().getTaskDefinitionKey());
                }
                // 会签脏数据处理,节点退回会签清空
                // 如果在会签脏数据范畴中发现 Key改变,说明会签脏数据在上个节点就结束了,可以把会签脏数据删掉
                if (multiKey != null && !multiKey.toString().equals(stack.peek().getTaskDefinitionKey())) {
                    deleteKeyList.set(multiIndex , deleteKeyList.get(multiIndex).replace(stack.peek().getTaskDefinitionKey() + ",", ""));
                    multiKey = null;
                    // 结束进行下校验删除
                    multiOpera = true;
                }
                // 其他脏数据处理
                // 发现该路线最后一条脏数据,说明这条脏数据线路处理完了,删除脏数据信息
                // 脏数据产生的新实例中是否包含这条数据
                if (multiKey == null && deleteKeyList.get(i).contains(stack.peek().getTaskDefinitionKey())) {
                    // 删除匹配到的部分
                    deleteKeyList.set(i , deleteKeyList.get(i).replace(stack.peek().getTaskDefinitionKey() + ",", ""));
                }
                // 如果每组中的元素都以匹配过,说明脏数据结束
                if ("".equals(deleteKeyList.get(i))) {
                    // 同时删除脏数据
                    deleteKeyList.remove(i);
                    dirtyDataLineList.remove(i);
                    break;
                }
            }
            // 会签数据处理需要在循环外处理,否则可能导致溢出
            // 会签的数据肯定是之前放进去的所以理论上不会溢出,但还是校验下
            if (multiOpera && deleteKeyList.size() > multiIndex && "".equals(deleteKeyList.get(multiIndex))) {
                // 同时删除脏数据
                deleteKeyList.remove(multiIndex);
                dirtyDataLineList.remove(multiIndex);
                multiIndex = -1;
                multiOpera = false;
            }
            // pop() 方法与 peek() 方法不同,在返回值的同时,会把值从栈中移除
            // 保存新的 userTaskKey 在下个循环中使用
            userTaskKey = new StringBuilder(stack.pop().getTaskDefinitionKey());
        }
        log.info("清洗后的历史节点数据:" + lastHistoricTaskInstanceList);
        return lastHistoricTaskInstanceList;
    }
 
    /**
     * 深搜递归获取流程未通过的节点
     * @param bpmnModel 流程模型
     * @param unfinishedTaskSet 未结束的任务节点
     * @param finishedSequenceFlowSet 已经完成的连线
     * @param finishedTaskSet 已完成的任务节点
     * @return
     */
    public static Set<String> dfsFindRejects(BpmnModel bpmnModel, Set<String> unfinishedTaskSet, Set<String> finishedSequenceFlowSet, Set<String> finishedTaskSet) {
        if (ObjectUtil.isNull(bpmnModel)) {
            throw new ServiceException("流程模型不存在");
        }
        Collection<FlowElement> allElements = getAllElements(bpmnModel.getMainProcess().getFlowElements(), null);
        Set<String> rejectedSet = new HashSet<>();
        for (FlowElement flowElement : allElements) {
            // 用户节点且未结束元素
            if (flowElement instanceof UserTask && unfinishedTaskSet.contains(flowElement.getId())) {
                List<String> hasSequenceFlow = iteratorFindFinishes(flowElement, null);
                List<String> rejects = iteratorFindRejects(flowElement, finishedSequenceFlowSet, finishedTaskSet, hasSequenceFlow, null);
                rejectedSet.addAll(rejects);
            }
        }
        return rejectedSet;
    }
 
    /**
     * 迭代获取父级节点列表,向前找
     * @param source 起始节点
     * @param hasSequenceFlow 已经经过的连线的ID,用于判断线路是否重复
     * @return
     */
    public static List<String> iteratorFindFinishes(FlowElement source, List<String> hasSequenceFlow) {
        hasSequenceFlow = hasSequenceFlow == null ? new ArrayList<>() : hasSequenceFlow;
 
        // 根据类型,获取入口连线
        List<SequenceFlow> sequenceFlows = getElementIncomingFlows(source);
 
        if (sequenceFlows != null) {
            // 循环找到目标元素
            for (SequenceFlow sequenceFlow: sequenceFlows) {
                // 如果发现连线重复,说明循环了,跳过这个循环
                if (hasSequenceFlow.contains(sequenceFlow.getId())) {
                    continue;
                }
                // 添加已经走过的连线
                hasSequenceFlow.add(sequenceFlow.getId());
                FlowElement finishedElement = sequenceFlow.getSourceFlowElement();
                // 类型为子流程,则添加子流程开始节点出口处相连的节点
                if (finishedElement instanceof SubProcess) {
                    FlowElement firstElement = (StartEvent) ((SubProcess) finishedElement).getFlowElements().toArray()[0];
                    // 获取子流程的连线
                    hasSequenceFlow.addAll(iteratorFindFinishes(firstElement, null));
                }
                // 继续迭代
                hasSequenceFlow = iteratorFindFinishes(finishedElement, hasSequenceFlow);
            }
        }
        return hasSequenceFlow;
    }
 
    /**
     * 根据正在运行的任务节点,迭代获取子级任务节点列表,向后找
     * @param source 起始节点
     * @param finishedSequenceFlowSet 已经完成的连线
     * @param finishedTaskSet 已经完成的任务节点
     * @param hasSequenceFlow 已经经过的连线的 ID,用于判断线路是否重复
     * @param rejectedList 未通过的元素
     * @return
     */
    public static List<String> iteratorFindRejects(FlowElement source, Set<String> finishedSequenceFlowSet, Set<String> finishedTaskSet
        , List<String> hasSequenceFlow, List<String> rejectedList) {
        hasSequenceFlow = hasSequenceFlow == null ? new ArrayList<>() : hasSequenceFlow;
        rejectedList = rejectedList == null ? new ArrayList<>() : rejectedList;
 
        // 根据类型,获取出口连线
        List<SequenceFlow> sequenceFlows = getElementOutgoingFlows(source);
 
        if (sequenceFlows != null) {
            // 循环找到目标元素
            for (SequenceFlow sequenceFlow: sequenceFlows) {
                // 如果发现连线重复,说明循环了,跳过这个循环
                if (hasSequenceFlow.contains(sequenceFlow.getId())) {
                    continue;
                }
                // 添加已经走过的连线
                hasSequenceFlow.add(sequenceFlow.getId());
                FlowElement targetElement = sequenceFlow.getTargetFlowElement();
                // 添加未完成的节点
                if (finishedTaskSet.contains(targetElement.getId())) {
                    rejectedList.add(targetElement.getId());
                }
                // 添加未完成的连线
                if (finishedSequenceFlowSet.contains(sequenceFlow.getId())) {
                    rejectedList.add(sequenceFlow.getId());
                }
                // 如果节点为子流程节点情况,则从节点中的第一个节点开始获取
                if (targetElement instanceof SubProcess) {
                    FlowElement firstElement = (FlowElement) (((SubProcess) targetElement).getFlowElements().toArray()[0]);
                    List<String> childList = iteratorFindRejects(firstElement, finishedSequenceFlowSet, finishedTaskSet, hasSequenceFlow, null);
                    // 如果找到节点,则说明该线路找到节点,不继续向下找,反之继续
                    if (childList != null && childList.size() > 0) {
                        rejectedList.addAll(childList);
                        continue;
                    }
                }
                // 继续迭代
                rejectedList = iteratorFindRejects(targetElement, finishedSequenceFlowSet, finishedTaskSet, hasSequenceFlow, rejectedList);
            }
        }
        return rejectedList;
    }
 
}