package com.iailab.module.bpm.framework.flowable.core.util;
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import cn.hutool.core.collection.CollUtil;
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import cn.hutool.core.lang.Assert;
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import cn.hutool.core.map.MapUtil;
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import cn.hutool.core.util.*;
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import com.iailab.framework.common.util.collection.CollectionUtils;
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import com.iailab.module.bpm.controller.admin.definition.vo.model.simple.BpmSimpleModelNodeVO;
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import com.iailab.module.bpm.enums.definition.*;
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import com.iailab.module.bpm.framework.flowable.core.enums.BpmTaskCandidateStrategyEnum;
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import com.iailab.module.bpm.framework.flowable.core.enums.BpmnModelConstants;
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import com.iailab.module.bpm.framework.flowable.core.listener.BpmCopyTaskDelegate;
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import org.flowable.bpmn.BpmnAutoLayout;
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import org.flowable.bpmn.constants.BpmnXMLConstants;
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import org.flowable.bpmn.model.Process;
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import org.flowable.bpmn.model.*;
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import java.util.*;
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import static com.iailab.module.bpm.framework.flowable.core.enums.BpmnModelConstants.*;
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import static com.iailab.module.bpm.framework.flowable.core.util.BpmnModelUtils.*;
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import static java.util.Arrays.asList;
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/**
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* 仿钉钉/飞书的模型相关的工具方法
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* <p>
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* 1. 核心的逻辑实现，可见 {@link #buildBpmnModel(String, String, BpmSimpleModelNodeVO)} 方法
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* 2. 所有的 BpmSimpleModelNodeVO 转换成 BPMN FlowNode 元素，可见 {@link NodeConvert} 实现类
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*
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* @author jason
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*/
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public class SimpleModelUtils {
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private static final Map<BpmSimpleModelNodeType, NodeConvert> NODE_CONVERTS = MapUtil.newHashMap();
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static {
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List<NodeConvert> converts = asList(new StartNodeConvert(), new EndNodeConvert(),
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new StartUserNodeConvert(), new ApproveNodeConvert(), new CopyNodeConvert(),
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new ConditionBranchNodeConvert(), new ParallelBranchNodeConvert(), new InclusiveBranchNodeConvert());
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converts.forEach(convert -> NODE_CONVERTS.put(convert.getType(), convert));
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}
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/**
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* 仿钉钉流程设计模型数据结构（json）转换成 Bpmn Model
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* <p>
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* 整体逻辑如下：
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* 1. 创建：BpmnModel、Process 对象
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* 2. 转换：将 BpmSimpleModelNodeVO 转换成 BPMN FlowNode 元素
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* 3. 连接：构建并添加节点之间的连线 Sequence Flow
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*
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* @param processId 流程标识
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* @param processName 流程名称
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* @param simpleModelNode 仿钉钉流程设计模型数据结构
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* @return Bpmn Model
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*/
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public static BpmnModel buildBpmnModel(String processId, String processName, BpmSimpleModelNodeVO simpleModelNode) {
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// 1. 创建 BpmnModel
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BpmnModel bpmnModel = new BpmnModel();
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bpmnModel.setTargetNamespace(BpmnXMLConstants.BPMN2_NAMESPACE); // 设置命名空间。不加这个，解析 Message 会报 NPE 异常
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// 创建 Process 对象
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Process process = new Process();
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process.setId(processId);
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process.setName(processName);
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process.setExecutable(Boolean.TRUE);
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bpmnModel.addProcess(process);
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// 2.1 创建 StartNode 节点
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// 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
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BpmSimpleModelNodeVO startNode = buildStartNode();
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startNode.setChildNode(simpleModelNode);
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// 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
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traverseNodeToBuildFlowNode(startNode, process);
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// 3. 构建并添加节点之间的连线 Sequence Flow
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EndEvent endEvent = BpmnModelUtils.getEndEvent(bpmnModel);
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traverseNodeToBuildSequenceFlow(process, startNode, endEvent.getId());
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// 4. 自动布局
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new BpmnAutoLayout(bpmnModel).execute();
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return bpmnModel;
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}
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private static BpmSimpleModelNodeVO buildStartNode() {
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return new BpmSimpleModelNodeVO().setId(START_EVENT_NODE_ID)
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.setName(BpmSimpleModelNodeType.START_USER_NODE.getName())
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.setType(BpmSimpleModelNodeType.START_NODE.getType());
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}
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/**
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* 遍历节点，构建 FlowNode 元素
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*
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* @param node SIMPLE 节点
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* @param process BPMN 流程
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*/
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private static void traverseNodeToBuildFlowNode(BpmSimpleModelNodeVO node, Process process) {
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// 1. 判断是否有效节点
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if (!isValidNode(node)) {
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return;
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}
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BpmSimpleModelNodeType nodeType = BpmSimpleModelNodeType.valueOf(node.getType());
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Assert.notNull(nodeType, "模型节点类型({})不支持", node.getType());
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// 2. 处理当前节点
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NodeConvert nodeConvert = NODE_CONVERTS.get(nodeType);
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Assert.notNull(nodeConvert, "模型节点类型的转换器({})不存在", node.getType());
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List<? extends FlowElement> flowElements = nodeConvert.convertList(node);
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flowElements.forEach(process::addFlowElement);
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// 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
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if (BpmSimpleModelNodeType.isBranchNode(node.getType())
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&& CollUtil.isNotEmpty(node.getConditionNodes())) {
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// 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
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node.getConditionNodes().forEach(item -> traverseNodeToBuildFlowNode(item.getChildNode(), process));
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}
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// 3.2 情况二：如果有“子”节点，则递归处理子节点
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traverseNodeToBuildFlowNode(node.getChildNode(), process);
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}
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/**
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* 遍历节点，构建 SequenceFlow 元素
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*
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* @param process Bpmn 流程
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* @param node 当前节点
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* @param targetNodeId 目标节点 ID
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*/
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private static void traverseNodeToBuildSequenceFlow(Process process, BpmSimpleModelNodeVO node, String targetNodeId) {
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// 1.1 无效节点返回
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if (!isValidNode(node)) {
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return;
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}
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// 1.2 END_NODE 直接返回
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BpmSimpleModelNodeType nodeType = BpmSimpleModelNodeType.valueOf(node.getType());
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Assert.notNull(nodeType, "模型节点类型不支持");
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if (nodeType == BpmSimpleModelNodeType.END_NODE) {
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return;
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}
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// 2.1 情况一：普通节点
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if (!BpmSimpleModelNodeType.isBranchNode(node.getType())) {
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traverseNormalNodeToBuildSequenceFlow(process, node, targetNodeId);
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} else {
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// 2.2 情况二：分支节点
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traverseBranchNodeToBuildSequenceFlow(process, node, targetNodeId);
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}
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}
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/**
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* 遍历普通（非条件）节点，构建 SequenceFlow 元素
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*
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* @param process Bpmn 流程
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* @param node 当前节点
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* @param targetNodeId 目标节点 ID
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*/
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private static void traverseNormalNodeToBuildSequenceFlow(Process process, BpmSimpleModelNodeVO node, String targetNodeId) {
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BpmSimpleModelNodeVO childNode = node.getChildNode();
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boolean isChildNodeValid = isValidNode(childNode);
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// 情况一：有“子”节点，则建立连线
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// 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
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String finalTargetNodeId = isChildNodeValid? childNode.getId() : targetNodeId;
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SequenceFlow sequenceFlow = buildBpmnSequenceFlow(node.getId(), finalTargetNodeId);
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process.addFlowElement(sequenceFlow);
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// 因为有子节点，递归调用后续子节点
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if (isChildNodeValid) {
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traverseNodeToBuildSequenceFlow(process, childNode, targetNodeId);
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}
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}
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/**
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* 遍历条件节点，构建 SequenceFlow 元素
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*
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* @param process Bpmn 流程
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* @param node 当前节点
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* @param targetNodeId 目标节点 ID
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*/
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private static void traverseBranchNodeToBuildSequenceFlow(Process process, BpmSimpleModelNodeVO node, String targetNodeId) {
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BpmSimpleModelNodeType nodeType = BpmSimpleModelNodeType.valueOf(node.getType());
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BpmSimpleModelNodeVO childNode = node.getChildNode();
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List<BpmSimpleModelNodeVO> conditionNodes = node.getConditionNodes();
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Assert.notEmpty(conditionNodes, "分支节点的条件节点不能为空");
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// 分支终点节点 ID
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String branchEndNodeId = null;
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if (nodeType == BpmSimpleModelNodeType.CONDITION_BRANCH_NODE) { // 条件分支
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// 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
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branchEndNodeId = isValidNode(childNode) ? childNode.getId() : targetNodeId;
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} else if (nodeType == BpmSimpleModelNodeType.PARALLEL_BRANCH_NODE
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|| nodeType == BpmSimpleModelNodeType.INCLUSIVE_BRANCH_NODE) { // 并行分支或包容分支
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// 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。
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branchEndNodeId = buildGatewayJoinId(node.getId());
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}
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Assert.notEmpty(branchEndNodeId, "分支终点节点 Id 不能为空");
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// 3. 遍历分支节点
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// 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
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for (BpmSimpleModelNodeVO item : conditionNodes) {
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Assert.isTrue(Objects.equals(item.getType(), BpmSimpleModelNodeType.CONDITION_NODE.getType()),
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"条件节点类型({})不符合", item.getType());
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BpmSimpleModelNodeVO conditionChildNode = item.getChildNode();
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// 3.1 分支有后续节点。即分支 1: A->B->C->D 的情况
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if (isValidNode(conditionChildNode)) {
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// 3.1.1 建立与后续的节点的连线。例如说，建立 A->B 的连线
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SequenceFlow sequenceFlow = ConditionNodeConvert.buildSequenceFlow(node.getId(), conditionChildNode.getId(), item);
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process.addFlowElement(sequenceFlow);
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// 3.1.2 递归调用后续节点连线。例如说，建立 B->C->D 的连线
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traverseNodeToBuildSequenceFlow(process, conditionChildNode, branchEndNodeId);
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} else {
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// 3.2 分支没有后续节点。例如说，建立 A->D 的连线
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SequenceFlow sequenceFlow = ConditionNodeConvert.buildSequenceFlow(node.getId(), branchEndNodeId, item);
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process.addFlowElement(sequenceFlow);
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}
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}
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// 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
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if (nodeType == BpmSimpleModelNodeType.PARALLEL_BRANCH_NODE
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|| nodeType == BpmSimpleModelNodeType.INCLUSIVE_BRANCH_NODE ) {
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String nextNodeId = isValidNode(childNode) ? childNode.getId() : targetNodeId;
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SequenceFlow sequenceFlow = buildBpmnSequenceFlow(branchEndNodeId, nextNodeId);
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process.addFlowElement(sequenceFlow);
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}
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// 5. 递归调用后续节点 继续递归。例如说，建立 D->E 的连线
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traverseNodeToBuildSequenceFlow(process, childNode, targetNodeId);
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}
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private static SequenceFlow buildBpmnSequenceFlow(String sourceId, String targetId) {
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return buildBpmnSequenceFlow(sourceId, targetId, null, null, null);
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}
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private static SequenceFlow buildBpmnSequenceFlow(String sourceId, String targetId,
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String sequenceFlowId, String sequenceFlowName,
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String conditionExpression) {
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Assert.notEmpty(sourceId, "sourceId 不能为空");
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Assert.notEmpty(targetId, "targetId 不能为空");
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// 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。
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// 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。
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SequenceFlow sequenceFlow = new SequenceFlow(sourceId, targetId);
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if (StrUtil.isNotEmpty(sequenceFlowId)) {
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sequenceFlow.setId(sequenceFlowId);
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}
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if (StrUtil.isNotEmpty(sequenceFlowName)) {
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sequenceFlow.setName(sequenceFlowName);
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}
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if (StrUtil.isNotEmpty(conditionExpression)) {
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sequenceFlow.setConditionExpression(conditionExpression);
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}
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return sequenceFlow;
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}
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public static boolean isValidNode(BpmSimpleModelNodeVO node) {
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return node != null && node.getId() != null;
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}
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public static boolean isSequentialApproveNode(BpmSimpleModelNodeVO node) {
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return BpmSimpleModelNodeType.APPROVE_NODE.getType().equals(node.getType())
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&& BpmUserTaskApproveMethodEnum.SEQUENTIAL.getMethod().equals(node.getApproveMethod());
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}
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// ========== 各种 convert 节点的方法: BpmSimpleModelNodeVO => BPMN FlowElement ==========
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private interface NodeConvert {
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default List<? extends FlowElement> convertList(BpmSimpleModelNodeVO node) {
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return Collections.singletonList(convert(node));
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}
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default FlowElement convert(BpmSimpleModelNodeVO node) {
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throw new UnsupportedOperationException("请实现该方法");
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}
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BpmSimpleModelNodeType getType();
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}
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private static class StartNodeConvert implements NodeConvert {
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@Override
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public StartEvent convert(BpmSimpleModelNodeVO node) {
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StartEvent startEvent = new StartEvent();
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startEvent.setId(node.getId());
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startEvent.setName(node.getName());
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return startEvent;
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}
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@Override
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public BpmSimpleModelNodeType getType() {
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return BpmSimpleModelNodeType.START_NODE;
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}
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}
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private static class EndNodeConvert implements NodeConvert {
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@Override
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public EndEvent convert(BpmSimpleModelNodeVO node) {
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EndEvent endEvent = new EndEvent();
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endEvent.setId(node.getId());
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endEvent.setName(node.getName());
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// TODO @芋艿 + jason：要不要加一个终止定义？
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return endEvent;
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}
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@Override
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public BpmSimpleModelNodeType getType() {
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return BpmSimpleModelNodeType.END_NODE;
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}
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}
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private static class StartUserNodeConvert implements NodeConvert {
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@Override
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public UserTask convert(BpmSimpleModelNodeVO node) {
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UserTask userTask = new UserTask();
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userTask.setId(node.getId());
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userTask.setName(node.getName());
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// 人工审批
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addExtensionElement(userTask, USER_TASK_APPROVE_TYPE, BpmUserTaskApproveTypeEnum.USER.getType());
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// 候选人策略为发起人自己
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addCandidateElements(BpmTaskCandidateStrategyEnum.START_USER.getStrategy(), null, userTask);
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// 添加表单字段权限属性元素
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addFormFieldsPermission(node.getFieldsPermission(), userTask);
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// 添加操作按钮配置属性元素
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addButtonsSetting(node.getButtonsSetting(), userTask);
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// 使用自动通过策略
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// 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；
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addAssignStartUserHandlerType(BpmUserTaskAssignStartUserHandlerTypeEnum.SKIP.getType(), userTask);
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return userTask;
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}
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@Override
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public BpmSimpleModelNodeType getType() {
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return BpmSimpleModelNodeType.START_USER_NODE;
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}
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}
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private static class ApproveNodeConvert implements NodeConvert {
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@Override
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public List<FlowElement> convertList(BpmSimpleModelNodeVO node) {
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List<FlowElement> flowElements = new ArrayList<>(2);
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// 1. 构建用户任务
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UserTask userTask = buildBpmnUserTask(node);
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flowElements.add(userTask);
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// 2. 添加用户任务的 Timer Boundary Event, 用于任务的审批超时处理
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if (node.getTimeoutHandler() != null && node.getTimeoutHandler().getEnable()) {
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BoundaryEvent boundaryEvent = buildUserTaskTimeoutBoundaryEvent(userTask, node.getTimeoutHandler());
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flowElements.add(boundaryEvent);
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}
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return flowElements;
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}
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@Override
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public BpmSimpleModelNodeType getType() {
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return BpmSimpleModelNodeType.APPROVE_NODE;
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}
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/**
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* 添加 UserTask 用户的审批超时 BoundaryEvent 事件
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*
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* @param userTask 审批任务
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* @param timeoutHandler 超时处理器
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* @return BoundaryEvent 超时事件
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*/
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private BoundaryEvent buildUserTaskTimeoutBoundaryEvent(UserTask userTask,
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BpmSimpleModelNodeVO.TimeoutHandler timeoutHandler) {
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// 1.1 定时器边界事件
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BoundaryEvent boundaryEvent = new BoundaryEvent();
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boundaryEvent.setId("Event-" + IdUtil.fastUUID());
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boundaryEvent.setCancelActivity(false); // 设置关联的任务为不会被中断
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boundaryEvent.setAttachedToRef(userTask);
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// 1.2 定义超时时间、最大提醒次数
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TimerEventDefinition eventDefinition = new TimerEventDefinition();
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eventDefinition.setTimeDuration(timeoutHandler.getTimeDuration());
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if (Objects.equals(BpmUserTaskTimeoutHandlerTypeEnum.REMINDER.getType(), timeoutHandler.getType()) &&
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timeoutHandler.getMaxRemindCount() != null && timeoutHandler.getMaxRemindCount() > 1) {
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eventDefinition.setTimeCycle(String.format("R%d/%s",
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timeoutHandler.getMaxRemindCount(), timeoutHandler.getTimeDuration()));
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}
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boundaryEvent.addEventDefinition(eventDefinition);
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// 2.1 添加定时器边界事件类型
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addExtensionElement(boundaryEvent, BOUNDARY_EVENT_TYPE, BpmBoundaryEventType.USER_TASK_TIMEOUT.getType());
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// 2.2 添加超时执行动作元素
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addExtensionElement(boundaryEvent, USER_TASK_TIMEOUT_HANDLER_TYPE, timeoutHandler.getType());
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return boundaryEvent;
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}
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private UserTask buildBpmnUserTask(BpmSimpleModelNodeVO node) {
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UserTask userTask = new UserTask();
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userTask.setId(node.getId());
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userTask.setName(node.getName());
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// 如果不是审批人节点，则直接返回
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addExtensionElement(userTask, USER_TASK_APPROVE_TYPE, node.getApproveType());
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if (ObjectUtil.notEqual(node.getApproveType(), BpmUserTaskApproveTypeEnum.USER.getType())) {
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return userTask;
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}
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// 添加候选人元素
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addCandidateElements(node.getCandidateStrategy(), node.getCandidateParam(), userTask);
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// 添加表单字段权限属性元素
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addFormFieldsPermission(node.getFieldsPermission(), userTask);
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// 添加操作按钮配置属性元素
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addButtonsSetting(node.getButtonsSetting(), userTask);
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// 处理多实例（审批方式）
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processMultiInstanceLoopCharacteristics(node.getApproveMethod(), node.getApproveRatio(), userTask);
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// 添加任务被拒绝的处理元素
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addTaskRejectElements(node.getRejectHandler(), userTask);
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// 添加用户任务的审批人与发起人相同时的处理元素
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addAssignStartUserHandlerType(node.getAssignStartUserHandlerType(), userTask);
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// 添加用户任务的空处理元素
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addAssignEmptyHandlerType(node.getAssignEmptyHandler(), userTask);
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// 设置审批任务的截止时间
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if (node.getTimeoutHandler() != null && node.getTimeoutHandler().getEnable()) {
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userTask.setDueDate(node.getTimeoutHandler().getTimeDuration());
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}
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return userTask;
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}
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private void processMultiInstanceLoopCharacteristics(Integer approveMethod, Integer approveRatio, UserTask userTask) {
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BpmUserTaskApproveMethodEnum approveMethodEnum = BpmUserTaskApproveMethodEnum.valueOf(approveMethod);
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Assert.notNull(approveMethodEnum, "审批方式({})不能为空", approveMethodEnum);
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// 添加审批方式的扩展属性
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addExtensionElement(userTask, BpmnModelConstants.USER_TASK_APPROVE_METHOD, approveMethod);
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if (approveMethodEnum == BpmUserTaskApproveMethodEnum.RANDOM) {
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// 随机审批，不需要设置多实例属性
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return;
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}
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// 处理多实例审批方式
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MultiInstanceLoopCharacteristics multiInstanceCharacteristics = new MultiInstanceLoopCharacteristics();
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// 设置 collectionVariable。本系统用不到，仅仅为了 Flowable 校验不报错
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multiInstanceCharacteristics.setInputDataItem("${coll_userList}");
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if (approveMethodEnum == BpmUserTaskApproveMethodEnum.ANY) {
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multiInstanceCharacteristics.setCompletionCondition(approveMethodEnum.getCompletionCondition());
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multiInstanceCharacteristics.setSequential(false);
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} else if (approveMethodEnum == BpmUserTaskApproveMethodEnum.SEQUENTIAL) {
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multiInstanceCharacteristics.setCompletionCondition(approveMethodEnum.getCompletionCondition());
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multiInstanceCharacteristics.setSequential(true);
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multiInstanceCharacteristics.setLoopCardinality("1");
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} else if (approveMethodEnum == BpmUserTaskApproveMethodEnum.RATIO) {
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Assert.notNull(approveRatio, "通过比例不能为空");
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multiInstanceCharacteristics.setCompletionCondition(
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String.format(approveMethodEnum.getCompletionCondition(), String.format("%.2f", approveRatio / 100D)));
|
multiInstanceCharacteristics.setSequential(false);
|
}
|
userTask.setLoopCharacteristics(multiInstanceCharacteristics);
|
}
|
|
}
|
|
private static class CopyNodeConvert implements NodeConvert {
|
|
@Override
|
public ServiceTask convert(BpmSimpleModelNodeVO node) {
|
ServiceTask serviceTask = new ServiceTask();
|
serviceTask.setId(node.getId());
|
serviceTask.setName(node.getName());
|
serviceTask.setImplementationType(ImplementationType.IMPLEMENTATION_TYPE_DELEGATEEXPRESSION);
|
serviceTask.setImplementation("${" + 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<ParallelGateway> 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<InclusiveGateway> 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<? extends FlowElement> 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<String> strConditionGroups = CollectionUtils.convertList(conditionGroups.getConditions(), item -> {
|
if (CollUtil.isEmpty(item.getRules())) {
|
return "";
|
}
|
// 构造规则表达式
|
List<String> 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<BpmSimpleModelNodeVO> simulateProcess(BpmSimpleModelNodeVO rootNode, Map<String, Object> variables) {
|
List<BpmSimpleModelNodeVO> resultNodes = new ArrayList<>();
|
|
// 从头开始遍历
|
simulateNextNode(rootNode, variables, resultNodes);
|
return resultNodes;
|
}
|
|
private static void simulateNextNode(BpmSimpleModelNodeVO currentNode, Map<String, Object> variables,
|
List<BpmSimpleModelNodeVO> 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<BpmSimpleModelNodeVO> 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<String, Object> variables, BpmSimpleModelNodeVO conditionNode) {
|
return BpmnModelUtils.evalConditionExpress(variables, ConditionNodeConvert.buildConditionExpression(conditionNode));
|
}
|
|
}
|
