| 提交 | 用户 | 时间 | ||
| bb2880 | 1 | package com.iailab.module.bpm.framework.flowable.core.candidate.strategy.other; |
| e7c126 | 2 | |
| H | 3 | import cn.hutool.core.convert.Convert; |
| f4f940 | 4 | import com.google.common.collect.Sets; |
| e7c126 | 5 | import com.iailab.module.bpm.framework.flowable.core.candidate.BpmTaskCandidateStrategy; |
| H | 6 | import com.iailab.module.bpm.framework.flowable.core.enums.BpmTaskCandidateStrategyEnum; |
| 7 | import com.iailab.module.bpm.framework.flowable.core.util.FlowableUtils; | |
| f4f940 | 8 | import lombok.extern.slf4j.Slf4j; |
| bb2880 | 9 | import org.flowable.bpmn.model.BpmnModel; |
| f4f940 | 10 | import org.flowable.common.engine.api.FlowableException; |
| e7c126 | 11 | import org.flowable.engine.delegate.DelegateExecution; |
| H | 12 | import org.springframework.stereotype.Component; |
| 13 | ||
| f4f940 | 14 | import java.util.HashMap; |
| bb2880 | 15 | import java.util.Map; |
| e7c126 | 16 | import java.util.Set; |
| H | 17 | |
| 18 | /** | |
| 19 | * 流程表达式 {@link BpmTaskCandidateStrategy} 实现类 | |
| 20 | * | |
| 21 | * @author iailab | |
| 22 | */ | |
| 23 | @Component | |
| f4f940 | 24 | @Slf4j |
| e7c126 | 25 | public class BpmTaskCandidateExpressionStrategy implements BpmTaskCandidateStrategy { |
| H | 26 | |
| 27 | @Override | |
| 28 | public BpmTaskCandidateStrategyEnum getStrategy() { | |
| 29 | return BpmTaskCandidateStrategyEnum.EXPRESSION; | |
| 30 | } | |
| 31 | ||
| 32 | @Override | |
| 33 | public void validateParam(String param) { | |
| 34 | // do nothing 因为它基本做不了校验 | |
| 35 | } | |
| 36 | ||
| 37 | @Override | |
| bb2880 | 38 | public Set<Long> calculateUsersByTask(DelegateExecution execution, String param) { |
| e7c126 | 39 | Object result = FlowableUtils.getExpressionValue(execution, param); |
| H | 40 | return Convert.toSet(Long.class, result); |
| 41 | } | |
| 42 | ||
| bb2880 | 43 | @Override |
| H | 44 | public Set<Long> calculateUsersByActivity(BpmnModel bpmnModel, String activityId, String param, |
| 45 | Long startUserId, String processDefinitionId, Map<String, Object> processVariables) { | |
| f4f940 | 46 | Map<String, Object> variables = processVariables == null ? new HashMap<>() : processVariables; |
| H | 47 | try { |
| 48 | Object result = FlowableUtils.getExpressionValue(variables, param); | |
| 49 | return Convert.toSet(Long.class, result); | |
| 50 | } catch (FlowableException ex) { | |
| 51 | // 预测未运行的节点时候，表达式如果包含 execution 或者不存在的流程变量会抛异常， | |
| 52 | log.warn("[calculateUsersByActivity][表达式({}) 变量({}) 解析报错", param, variables, ex); | |
| 53 | // 不能预测候选人，返回空列表, 避免流程无法进行 | |
| 54 | return Sets.newHashSet(); | |
| 55 | } | |
| bb2880 | 56 | } |
| H | 57 | |
| e7c126 | 58 | } |
