package com.iailab.module.bpm.framework.flowable.core.util; import cn.hutool.core.collection.CollUtil; import cn.hutool.core.lang.Assert; import cn.hutool.core.map.MapUtil; import cn.hutool.core.util.*; import com.iailab.framework.common.util.collection.CollectionUtils; import com.iailab.module.bpm.controller.admin.definition.vo.model.simple.BpmSimpleModelNodeVO; import com.iailab.module.bpm.enums.definition.*; import com.iailab.module.bpm.framework.flowable.core.enums.BpmTaskCandidateStrategyEnum; import com.iailab.module.bpm.framework.flowable.core.enums.BpmnModelConstants; import com.iailab.module.bpm.framework.flowable.core.listener.BpmCopyTaskDelegate; import org.flowable.bpmn.BpmnAutoLayout; import org.flowable.bpmn.constants.BpmnXMLConstants; import org.flowable.bpmn.model.Process; import org.flowable.bpmn.model.*; import java.util.*; import static com.iailab.module.bpm.framework.flowable.core.enums.BpmnModelConstants.*; import static com.iailab.module.bpm.framework.flowable.core.util.BpmnModelUtils.*; import static java.util.Arrays.asList; /** * 仿钉钉/飞书的模型相关的工具方法 *

* 1. 核心的逻辑实现，可见 {@link #buildBpmnModel(String, String, BpmSimpleModelNodeVO)} 方法 * 2. 所有的 BpmSimpleModelNodeVO 转换成 BPMN FlowNode 元素，可见 {@link NodeConvert} 实现类 * * @author jason */ public class SimpleModelUtils { private static final Map NODE_CONVERTS = MapUtil.newHashMap(); static { List converts = asList(new StartNodeConvert(), new EndNodeConvert(), new StartUserNodeConvert(), new ApproveNodeConvert(), new CopyNodeConvert(), new ConditionBranchNodeConvert(), new ParallelBranchNodeConvert(), new InclusiveBranchNodeConvert()); converts.forEach(convert -> NODE_CONVERTS.put(convert.getType(), convert)); } /** * 仿钉钉流程设计模型数据结构（json）转换成 Bpmn Model *

* 整体逻辑如下： * 1. 创建：BpmnModel、Process 对象 * 2. 转换：将 BpmSimpleModelNodeVO 转换成 BPMN FlowNode 元素 * 3. 连接：构建并添加节点之间的连线 Sequence Flow * * @param processId 流程标识 * @param processName 流程名称 * @param simpleModelNode 仿钉钉流程设计模型数据结构 * @return Bpmn Model */ public static BpmnModel buildBpmnModel(String processId, String processName, BpmSimpleModelNodeVO simpleModelNode) { // 1. 创建 BpmnModel BpmnModel bpmnModel = new BpmnModel(); bpmnModel.setTargetNamespace(BpmnXMLConstants.BPMN2_NAMESPACE); // 设置命名空间。不加这个，解析 Message 会报 NPE 异常 // 创建 Process 对象 Process process = new Process(); process.setId(processId); process.setName(processName); process.setExecutable(Boolean.TRUE); bpmnModel.addProcess(process); // 2.1 创建 StartNode 节点 // 原因是：目前前端的第一个节点是“发起人节点”，所以这里构建一个 StartNode，用于创建 Bpmn 的 StartEvent 节点 BpmSimpleModelNodeVO startNode = buildStartNode(); startNode.setChildNode(simpleModelNode); // 2.2 将前端传递的 simpleModelNode 数据结构（json），转换成从 BPMN FlowNode 元素，并添加到 Main Process 中 traverseNodeToBuildFlowNode(startNode, process); // 3. 构建并添加节点之间的连线 Sequence Flow EndEvent endEvent = BpmnModelUtils.getEndEvent(bpmnModel); traverseNodeToBuildSequenceFlow(process, startNode, endEvent.getId()); // 4. 自动布局 new BpmnAutoLayout(bpmnModel).execute(); return bpmnModel; } private static BpmSimpleModelNodeVO buildStartNode() { return new BpmSimpleModelNodeVO().setId(START_EVENT_NODE_ID) .setName(BpmSimpleModelNodeType.START_USER_NODE.getName()) .setType(BpmSimpleModelNodeType.START_NODE.getType()); } /** * 遍历节点，构建 FlowNode 元素 * * @param node SIMPLE 节点 * @param process BPMN 流程 */ private static void traverseNodeToBuildFlowNode(BpmSimpleModelNodeVO node, Process process) { // 1. 判断是否有效节点 if (!isValidNode(node)) { return; } BpmSimpleModelNodeType nodeType = BpmSimpleModelNodeType.valueOf(node.getType()); Assert.notNull(nodeType, "模型节点类型({})不支持", node.getType()); // 2. 处理当前节点 NodeConvert nodeConvert = NODE_CONVERTS.get(nodeType); Assert.notNull(nodeConvert, "模型节点类型的转换器({})不存在", node.getType()); List flowElements = nodeConvert.convertList(node); flowElements.forEach(process::addFlowElement); // 3.1 情况一：如果当前是分支节点，并且存在条件节点，则处理每个条件的子节点 if (BpmSimpleModelNodeType.isBranchNode(node.getType()) && CollUtil.isNotEmpty(node.getConditionNodes())) { // 注意：这里的 item.getChildNode() 处理的是每个条件的子节点，不是处理条件 node.getConditionNodes().forEach(item -> traverseNodeToBuildFlowNode(item.getChildNode(), process)); } // 3.2 情况二：如果有“子”节点，则递归处理子节点 traverseNodeToBuildFlowNode(node.getChildNode(), process); } /** * 遍历节点，构建 SequenceFlow 元素 * * @param process Bpmn 流程 * @param node 当前节点 * @param targetNodeId 目标节点 ID */ private static void traverseNodeToBuildSequenceFlow(Process process, BpmSimpleModelNodeVO node, String targetNodeId) { // 1.1 无效节点返回 if (!isValidNode(node)) { return; } // 1.2 END_NODE 直接返回 BpmSimpleModelNodeType nodeType = BpmSimpleModelNodeType.valueOf(node.getType()); Assert.notNull(nodeType, "模型节点类型不支持"); if (nodeType == BpmSimpleModelNodeType.END_NODE) { return; } // 2.1 情况一：普通节点 if (!BpmSimpleModelNodeType.isBranchNode(node.getType())) { traverseNormalNodeToBuildSequenceFlow(process, node, targetNodeId); } else { // 2.2 情况二：分支节点 traverseBranchNodeToBuildSequenceFlow(process, node, targetNodeId); } } /** * 遍历普通（非条件）节点，构建 SequenceFlow 元素 * * @param process Bpmn 流程 * @param node 当前节点 * @param targetNodeId 目标节点 ID */ private static void traverseNormalNodeToBuildSequenceFlow(Process process, BpmSimpleModelNodeVO node, String targetNodeId) { BpmSimpleModelNodeVO childNode = node.getChildNode(); boolean isChildNodeValid = isValidNode(childNode); // 情况一：有“子”节点，则建立连线 // 情况二：没有“子节点”，则直接跟 targetNodeId 建立连线。例如说，结束节点、条件分支（分支节点的孩子节点或聚合节点）的最后一个节点 String finalTargetNodeId = isChildNodeValid? childNode.getId() : targetNodeId; SequenceFlow sequenceFlow = buildBpmnSequenceFlow(node.getId(), finalTargetNodeId); process.addFlowElement(sequenceFlow); // 因为有子节点，递归调用后续子节点 if (isChildNodeValid) { traverseNodeToBuildSequenceFlow(process, childNode, targetNodeId); } } /** * 遍历条件节点，构建 SequenceFlow 元素 * * @param process Bpmn 流程 * @param node 当前节点 * @param targetNodeId 目标节点 ID */ private static void traverseBranchNodeToBuildSequenceFlow(Process process, BpmSimpleModelNodeVO node, String targetNodeId) { BpmSimpleModelNodeType nodeType = BpmSimpleModelNodeType.valueOf(node.getType()); BpmSimpleModelNodeVO childNode = node.getChildNode(); List conditionNodes = node.getConditionNodes(); Assert.notEmpty(conditionNodes, "分支节点的条件节点不能为空"); // 分支终点节点 ID String branchEndNodeId = null; if (nodeType == BpmSimpleModelNodeType.CONDITION_BRANCH_NODE) { // 条件分支 // 分两种情况 1. 分支节点有孩子节点为孩子节点 Id 2. 分支节点孩子为无效节点时 (分支嵌套且为分支最后一个节点) 为分支终点节点 ID branchEndNodeId = isValidNode(childNode) ? childNode.getId() : targetNodeId; } else if (nodeType == BpmSimpleModelNodeType.PARALLEL_BRANCH_NODE || nodeType == BpmSimpleModelNodeType.INCLUSIVE_BRANCH_NODE) { // 并行分支或包容分支 // 分支节点：分支终点节点 Id 为程序创建的网关集合节点。目前不会从前端传入。 branchEndNodeId = buildGatewayJoinId(node.getId()); } Assert.notEmpty(branchEndNodeId, "分支终点节点 Id 不能为空"); // 3. 遍历分支节点 // 下面的注释，以如下情况举例子。分支 1：A->B->C->D->E，分支 2：A->D->E。其中，A 为分支节点, D 为 A 孩子节点 for (BpmSimpleModelNodeVO item : conditionNodes) { Assert.isTrue(Objects.equals(item.getType(), BpmSimpleModelNodeType.CONDITION_NODE.getType()), "条件节点类型({})不符合", item.getType()); BpmSimpleModelNodeVO conditionChildNode = item.getChildNode(); // 3.1 分支有后续节点。即分支 1: A->B->C->D 的情况 if (isValidNode(conditionChildNode)) { // 3.1.1 建立与后续的节点的连线。例如说，建立 A->B 的连线 SequenceFlow sequenceFlow = ConditionNodeConvert.buildSequenceFlow(node.getId(), conditionChildNode.getId(), item); process.addFlowElement(sequenceFlow); // 3.1.2 递归调用后续节点连线。例如说，建立 B->C->D 的连线 traverseNodeToBuildSequenceFlow(process, conditionChildNode, branchEndNodeId); } else { // 3.2 分支没有后续节点。例如说，建立 A->D 的连线 SequenceFlow sequenceFlow = ConditionNodeConvert.buildSequenceFlow(node.getId(), branchEndNodeId, item); process.addFlowElement(sequenceFlow); } } // 4. 如果是并行分支、包容分支，由于是程序创建的聚合网关，需要手工创建聚合网关和下一个节点的连线 if (nodeType == BpmSimpleModelNodeType.PARALLEL_BRANCH_NODE || nodeType == BpmSimpleModelNodeType.INCLUSIVE_BRANCH_NODE ) { String nextNodeId = isValidNode(childNode) ? childNode.getId() : targetNodeId; SequenceFlow sequenceFlow = buildBpmnSequenceFlow(branchEndNodeId, nextNodeId); process.addFlowElement(sequenceFlow); } // 5. 递归调用后续节点 继续递归。例如说，建立 D->E 的连线 traverseNodeToBuildSequenceFlow(process, childNode, targetNodeId); } private static SequenceFlow buildBpmnSequenceFlow(String sourceId, String targetId) { return buildBpmnSequenceFlow(sourceId, targetId, null, null, null); } private static SequenceFlow buildBpmnSequenceFlow(String sourceId, String targetId, String sequenceFlowId, String sequenceFlowName, String conditionExpression) { Assert.notEmpty(sourceId, "sourceId 不能为空"); Assert.notEmpty(targetId, "targetId 不能为空"); // TODO @jason：如果 sequenceFlowId 不存在的时候，是不是要生成一个默认的 sequenceFlowId？ @芋艿： 貌似不需要,Flowable 会默认生成；TODO @jason：建议还是搞一个，主要是后续好排查问题。 // TODO @jason：如果 name 不存在的时候，是不是要生成一个默认的 name？ @芋艿： 不需要生成默认的吧？ 这个会在流程图展示的， 一般用户填写的。不好生成默认的吧；TODO @jason：建议还是搞一个，主要是后续好排查问题。 SequenceFlow sequenceFlow = new SequenceFlow(sourceId, targetId); if (StrUtil.isNotEmpty(sequenceFlowId)) { sequenceFlow.setId(sequenceFlowId); } if (StrUtil.isNotEmpty(sequenceFlowName)) { sequenceFlow.setName(sequenceFlowName); } if (StrUtil.isNotEmpty(conditionExpression)) { sequenceFlow.setConditionExpression(conditionExpression); } return sequenceFlow; } public static boolean isValidNode(BpmSimpleModelNodeVO node) { return node != null && node.getId() != null; } public static boolean isSequentialApproveNode(BpmSimpleModelNodeVO node) { return BpmSimpleModelNodeType.APPROVE_NODE.getType().equals(node.getType()) && BpmUserTaskApproveMethodEnum.SEQUENTIAL.getMethod().equals(node.getApproveMethod()); } // ========== 各种 convert 节点的方法: BpmSimpleModelNodeVO => BPMN FlowElement ========== private interface NodeConvert { default List convertList(BpmSimpleModelNodeVO node) { return Collections.singletonList(convert(node)); } default FlowElement convert(BpmSimpleModelNodeVO node) { throw new UnsupportedOperationException("请实现该方法"); } BpmSimpleModelNodeType getType(); } private static class StartNodeConvert implements NodeConvert { @Override public StartEvent convert(BpmSimpleModelNodeVO node) { StartEvent startEvent = new StartEvent(); startEvent.setId(node.getId()); startEvent.setName(node.getName()); return startEvent; } @Override public BpmSimpleModelNodeType getType() { return BpmSimpleModelNodeType.START_NODE; } } private static class EndNodeConvert implements NodeConvert { @Override public EndEvent convert(BpmSimpleModelNodeVO node) { EndEvent endEvent = new EndEvent(); endEvent.setId(node.getId()); endEvent.setName(node.getName()); // TODO @芋艿 + jason：要不要加一个终止定义？ return endEvent; } @Override public BpmSimpleModelNodeType getType() { return BpmSimpleModelNodeType.END_NODE; } } private static class StartUserNodeConvert implements NodeConvert { @Override public UserTask convert(BpmSimpleModelNodeVO node) { UserTask userTask = new UserTask(); userTask.setId(node.getId()); userTask.setName(node.getName()); // 人工审批 addExtensionElement(userTask, USER_TASK_APPROVE_TYPE, BpmUserTaskApproveTypeEnum.USER.getType()); // 候选人策略为发起人自己 addCandidateElements(BpmTaskCandidateStrategyEnum.START_USER.getStrategy(), null, userTask); // 添加表单字段权限属性元素 addFormFieldsPermission(node.getFieldsPermission(), userTask); // 添加操作按钮配置属性元素 addButtonsSetting(node.getButtonsSetting(), userTask); // 使用自动通过策略 // TODO @芋艿 复用了SKIP， 是否需要新加一个策略；TODO @芋艿：【回复】是不是应该类似飞书，搞个草稿状态。待定；还有一种策略，不标记自动通过，而是首次发起后，第一个节点，自动通过； addAssignStartUserHandlerType(BpmUserTaskAssignStartUserHandlerTypeEnum.SKIP.getType(), userTask); return userTask; } @Override public BpmSimpleModelNodeType getType() { return BpmSimpleModelNodeType.START_USER_NODE; } } private static class ApproveNodeConvert implements NodeConvert { @Override public List convertList(BpmSimpleModelNodeVO node) { List flowElements = new ArrayList<>(2); // 1. 构建用户任务 UserTask userTask = buildBpmnUserTask(node); flowElements.add(userTask); // 2. 添加用户任务的 Timer Boundary Event, 用于任务的审批超时处理 if (node.getTimeoutHandler() != null && node.getTimeoutHandler().getEnable()) { BoundaryEvent boundaryEvent = buildUserTaskTimeoutBoundaryEvent(userTask, node.getTimeoutHandler()); flowElements.add(boundaryEvent); } return flowElements; } @Override public BpmSimpleModelNodeType getType() { return BpmSimpleModelNodeType.APPROVE_NODE; } /** * 添加 UserTask 用户的审批超时 BoundaryEvent 事件 * * @param userTask 审批任务 * @param timeoutHandler 超时处理器 * @return BoundaryEvent 超时事件 */ private BoundaryEvent buildUserTaskTimeoutBoundaryEvent(UserTask userTask, BpmSimpleModelNodeVO.TimeoutHandler timeoutHandler) { // 1.1 定时器边界事件 BoundaryEvent boundaryEvent = new BoundaryEvent(); boundaryEvent.setId("Event-" + IdUtil.fastUUID()); boundaryEvent.setCancelActivity(false); // 设置关联的任务为不会被中断 boundaryEvent.setAttachedToRef(userTask); // 1.2 定义超时时间、最大提醒次数 TimerEventDefinition eventDefinition = new TimerEventDefinition(); eventDefinition.setTimeDuration(timeoutHandler.getTimeDuration()); if (Objects.equals(BpmUserTaskTimeoutHandlerTypeEnum.REMINDER.getType(), timeoutHandler.getType()) && timeoutHandler.getMaxRemindCount() != null && timeoutHandler.getMaxRemindCount() > 1) { eventDefinition.setTimeCycle(String.format("R%d/%s", timeoutHandler.getMaxRemindCount(), timeoutHandler.getTimeDuration())); } boundaryEvent.addEventDefinition(eventDefinition); // 2.1 添加定时器边界事件类型 addExtensionElement(boundaryEvent, BOUNDARY_EVENT_TYPE, BpmBoundaryEventType.USER_TASK_TIMEOUT.getType()); // 2.2 添加超时执行动作元素 addExtensionElement(boundaryEvent, USER_TASK_TIMEOUT_HANDLER_TYPE, timeoutHandler.getType()); return boundaryEvent; } private UserTask buildBpmnUserTask(BpmSimpleModelNodeVO node) { UserTask userTask = new UserTask(); userTask.setId(node.getId()); userTask.setName(node.getName()); // 如果不是审批人节点，则直接返回 addExtensionElement(userTask, USER_TASK_APPROVE_TYPE, node.getApproveType()); if (ObjectUtil.notEqual(node.getApproveType(), BpmUserTaskApproveTypeEnum.USER.getType())) { return userTask; } // 添加候选人元素 addCandidateElements(node.getCandidateStrategy(), node.getCandidateParam(), userTask); // 添加表单字段权限属性元素 addFormFieldsPermission(node.getFieldsPermission(), userTask); // 添加操作按钮配置属性元素 addButtonsSetting(node.getButtonsSetting(), userTask); // 处理多实例（审批方式） processMultiInstanceLoopCharacteristics(node.getApproveMethod(), node.getApproveRatio(), userTask); // 添加任务被拒绝的处理元素 addTaskRejectElements(node.getRejectHandler(), userTask); // 添加用户任务的审批人与发起人相同时的处理元素 addAssignStartUserHandlerType(node.getAssignStartUserHandlerType(), userTask); // 添加用户任务的空处理元素 addAssignEmptyHandlerType(node.getAssignEmptyHandler(), userTask); // 设置审批任务的截止时间 if (node.getTimeoutHandler() != null && node.getTimeoutHandler().getEnable()) { userTask.setDueDate(node.getTimeoutHandler().getTimeDuration()); } return userTask; } private void processMultiInstanceLoopCharacteristics(Integer approveMethod, Integer approveRatio, UserTask userTask) { BpmUserTaskApproveMethodEnum approveMethodEnum = BpmUserTaskApproveMethodEnum.valueOf(approveMethod); Assert.notNull(approveMethodEnum, "审批方式({})不能为空", approveMethodEnum); // 添加审批方式的扩展属性 addExtensionElement(userTask, BpmnModelConstants.USER_TASK_APPROVE_METHOD, approveMethod); if (approveMethodEnum == BpmUserTaskApproveMethodEnum.RANDOM) { // 随机审批，不需要设置多实例属性 return; } // 处理多实例审批方式 MultiInstanceLoopCharacteristics multiInstanceCharacteristics = new MultiInstanceLoopCharacteristics(); // 设置 collectionVariable。本系统用不到，仅仅为了 Flowable 校验不报错 multiInstanceCharacteristics.setInputDataItem("${coll_userList}"); if (approveMethodEnum == BpmUserTaskApproveMethodEnum.ANY) { multiInstanceCharacteristics.setCompletionCondition(approveMethodEnum.getCompletionCondition()); multiInstanceCharacteristics.setSequential(false); } else if (approveMethodEnum == BpmUserTaskApproveMethodEnum.SEQUENTIAL) { multiInstanceCharacteristics.setCompletionCondition(approveMethodEnum.getCompletionCondition()); multiInstanceCharacteristics.setSequential(true); multiInstanceCharacteristics.setLoopCardinality("1"); } else if (approveMethodEnum == BpmUserTaskApproveMethodEnum.RATIO) { Assert.notNull(approveRatio, "通过比例不能为空"); multiInstanceCharacteristics.setCompletionCondition( String.format(approveMethodEnum.getCompletionCondition(), String.format("%.2f", approveRatio / 100D))); multiInstanceCharacteristics.setSequential(false); } userTask.setLoopCharacteristics(multiInstanceCharacteristics); } } private static class CopyNodeConvert implements NodeConvert { @Override public ServiceTask convert(BpmSimpleModelNodeVO node) { ServiceTask serviceTask = new ServiceTask(); serviceTask.setId(node.getId()); serviceTask.setName(node.getName()); serviceTask.setImplementationType(ImplementationType.IMPLEMENTATION_TYPE_DELEGATEEXPRESSION); serviceTask.setImplementation("${" + BpmCopyTaskDelegate.BEAN_NAME + "}"); // 添加抄送候选人元素 addCandidateElements(node.getCandidateStrategy(), node.getCandidateParam(), serviceTask); // 添加表单字段权限属性元素 addFormFieldsPermission(node.getFieldsPermission(), serviceTask); return serviceTask; } @Override public BpmSimpleModelNodeType getType() { return BpmSimpleModelNodeType.COPY_NODE; } } private static class ConditionBranchNodeConvert implements NodeConvert { @Override public ExclusiveGateway convert(BpmSimpleModelNodeVO node) { ExclusiveGateway exclusiveGateway = new ExclusiveGateway(); exclusiveGateway.setId(node.getId()); // TODO @jason：setName // 设置默认的序列流（条件） BpmSimpleModelNodeVO defaultSeqFlow = CollUtil.findOne(node.getConditionNodes(), item -> BooleanUtil.isTrue(item.getDefaultFlow())); Assert.notNull(defaultSeqFlow, "条件分支节点({})的默认序列流不能为空", node.getId()); exclusiveGateway.setDefaultFlow(defaultSeqFlow.getId()); return exclusiveGateway; } @Override public BpmSimpleModelNodeType getType() { return BpmSimpleModelNodeType.CONDITION_BRANCH_NODE; } } private static class ParallelBranchNodeConvert implements NodeConvert { @Override public List convertList(BpmSimpleModelNodeVO node) { ParallelGateway parallelGateway = new ParallelGateway(); parallelGateway.setId(node.getId()); // TODO @jason：setName // 并行聚合网关由程序创建，前端不需要传入 ParallelGateway joinParallelGateway = new ParallelGateway(); joinParallelGateway.setId(buildGatewayJoinId(node.getId())); // TODO @jason：setName return CollUtil.newArrayList(parallelGateway, joinParallelGateway); } @Override public BpmSimpleModelNodeType getType() { return BpmSimpleModelNodeType.PARALLEL_BRANCH_NODE; } } private static class InclusiveBranchNodeConvert implements NodeConvert { @Override public List convertList(BpmSimpleModelNodeVO node) { InclusiveGateway inclusiveGateway = new InclusiveGateway(); inclusiveGateway.setId(node.getId()); // 设置默认的序列流（条件） BpmSimpleModelNodeVO defaultSeqFlow = CollUtil.findOne(node.getConditionNodes(), item -> BooleanUtil.isTrue(item.getDefaultFlow())); Assert.notNull(defaultSeqFlow, "包容分支节点({})的默认序列流不能为空", node.getId()); inclusiveGateway.setDefaultFlow(defaultSeqFlow.getId()); // TODO @jason：setName // 并行聚合网关由程序创建，前端不需要传入 InclusiveGateway joinInclusiveGateway = new InclusiveGateway(); joinInclusiveGateway.setId(buildGatewayJoinId(node.getId())); // TODO @jason：setName return CollUtil.newArrayList(inclusiveGateway, joinInclusiveGateway); } @Override public BpmSimpleModelNodeType getType() { return BpmSimpleModelNodeType.INCLUSIVE_BRANCH_NODE; } } public static class ConditionNodeConvert implements NodeConvert { @Override public List convertList(BpmSimpleModelNodeVO node) { // 原因是：正常情况下，它不会被调用到 throw new UnsupportedOperationException("条件节点不支持转换"); } @Override public BpmSimpleModelNodeType getType() { return BpmSimpleModelNodeType.CONDITION_NODE; } public static SequenceFlow buildSequenceFlow(String sourceId, String targetId, BpmSimpleModelNodeVO node) { String conditionExpression = buildConditionExpression(node); return buildBpmnSequenceFlow(sourceId, targetId, node.getId(), node.getName(), conditionExpression); } /** * 构造条件表达式 * * @param node 条件节点 */ public static String buildConditionExpression(BpmSimpleModelNodeVO node) { BpmSimpleModeConditionType conditionTypeEnum = BpmSimpleModeConditionType.valueOf(node.getConditionType()); if (conditionTypeEnum == BpmSimpleModeConditionType.EXPRESSION) { return node.getConditionExpression(); } if (conditionTypeEnum == BpmSimpleModeConditionType.RULE) { BpmSimpleModelNodeVO.ConditionGroups conditionGroups = node.getConditionGroups(); if (conditionGroups == null || CollUtil.isEmpty(conditionGroups.getConditions())) { return null; } List strConditionGroups = CollectionUtils.convertList(conditionGroups.getConditions(), item -> { if (CollUtil.isEmpty(item.getRules())) { return ""; } // 构造规则表达式 List list = CollectionUtils.convertList(item.getRules(), (rule) -> { String rightSide = NumberUtil.isNumber(rule.getRightSide()) ? rule.getRightSide() : "\"" + rule.getRightSide() + "\""; // 如果非数值类型加引号 return String.format(" %s %s var:convertByType(%s,%s)", rule.getLeftSide(), rule.getOpCode(), rule.getLeftSide(), rightSide); }); // 构造条件组的表达式 Boolean and = item.getAnd(); return "(" + CollUtil.join(list, and ? " && " : " || ") + ")"; }); return String.format("${%s}", CollUtil.join(strConditionGroups, conditionGroups.getAnd() ? " && " : " || ")); } return null; } } private static String buildGatewayJoinId(String id) { return id + "_join"; } // ========== SIMPLE 流程预测相关的方法 ========== public static List simulateProcess(BpmSimpleModelNodeVO rootNode, Map variables) { List resultNodes = new ArrayList<>(); // 从头开始遍历 simulateNextNode(rootNode, variables, resultNodes); return resultNodes; } private static void simulateNextNode(BpmSimpleModelNodeVO currentNode, Map variables, List resultNodes) { // 如果不合法（包括为空），则直接结束 if (!isValidNode(currentNode)) { return; } BpmSimpleModelNodeType nodeType = BpmSimpleModelNodeType.valueOf(currentNode.getType()); Assert.notNull(nodeType, "模型节点类型不支持"); // 情况：START_NODE/START_USER_NODE/APPROVE_NODE/COPY_NODE/END_NODE if (nodeType == BpmSimpleModelNodeType.START_NODE || nodeType == BpmSimpleModelNodeType.START_USER_NODE || nodeType == BpmSimpleModelNodeType.APPROVE_NODE || nodeType == BpmSimpleModelNodeType.COPY_NODE || nodeType == BpmSimpleModelNodeType.END_NODE) { // 添加元素 resultNodes.add(currentNode); } // 情况：CONDITION_BRANCH_NODE 排它，只有一个满足条件的。如果没有，就走默认的 if (nodeType == BpmSimpleModelNodeType.CONDITION_BRANCH_NODE) { // 查找满足条件的 BpmSimpleModelNodeVO 节点 BpmSimpleModelNodeVO matchConditionNode = CollUtil.findOne(currentNode.getConditionNodes(), conditionNode -> !BooleanUtil.isTrue(conditionNode.getDefaultFlow()) && evalConditionExpress(variables, conditionNode)); if (matchConditionNode == null) { matchConditionNode = CollUtil.findOne(currentNode.getConditionNodes(), conditionNode -> BooleanUtil.isTrue(conditionNode.getDefaultFlow())); } Assert.notNull(matchConditionNode, "找不到条件节点({})", currentNode); // 遍历满足条件的 BpmSimpleModelNodeVO 节点 simulateNextNode(matchConditionNode.getChildNode(), variables, resultNodes); } // 情况：INCLUSIVE_BRANCH_NODE 包容，多个满足条件的。如果没有，就走默认的 if (nodeType == BpmSimpleModelNodeType.INCLUSIVE_BRANCH_NODE) { // 查找满足条件的 BpmSimpleModelNodeVO 节点 Collection matchConditionNodes = CollUtil.filterNew(currentNode.getConditionNodes(), conditionNode -> !BooleanUtil.isTrue(conditionNode.getDefaultFlow()) && evalConditionExpress(variables, conditionNode)); if (CollUtil.isEmpty(matchConditionNodes)) { matchConditionNodes = CollUtil.filterNew(currentNode.getConditionNodes(), conditionNode -> BooleanUtil.isTrue(conditionNode.getDefaultFlow())); } Assert.isTrue(!matchConditionNodes.isEmpty(), "找不到条件节点({})", currentNode); // 遍历满足条件的 BpmSimpleModelNodeVO 节点 matchConditionNodes.forEach(matchConditionNode -> simulateNextNode(matchConditionNode.getChildNode(), variables, resultNodes)); } // 情况：PARALLEL_BRANCH_NODE 并行，都满足，都走 if (nodeType == BpmSimpleModelNodeType.PARALLEL_BRANCH_NODE) { // 遍历所有 BpmSimpleModelNodeVO 节点 currentNode.getConditionNodes().forEach(matchConditionNode -> simulateNextNode(matchConditionNode.getChildNode(), variables, resultNodes)); } // 遍历子节点 simulateNextNode(currentNode.getChildNode(), variables, resultNodes); } public static boolean evalConditionExpress(Map variables, BpmSimpleModelNodeVO conditionNode) { return BpmnModelUtils.evalConditionExpress(variables, ConditionNodeConvert.buildConditionExpression(conditionNode)); } }