1. IdentityLink与TaskEntity
An identity link is used to associate a task with a certain identity. For example: - a user can be an assignee (= identity link type) for a task - a group can be a candidate-group (= identity link type) for a task
TaskEntity包含了一系列的IdentityLink操作方法:
public IdentityLinkEntity addIdentityLink(String userId, String groupId, String type) { IdentityLinkEntity identityLinkEntity = new IdentityLinkEntity(); getIdentityLinks().add(identityLinkEntity); identityLinkEntity.setTask(this); identityLinkEntity.setUserId(userId); identityLinkEntity.setGroupId(groupId); identityLinkEntity.setType(type); identityLinkEntity.insert(); if (userId != null && processInstanceId != null) { getProcessInstance().involveUser(userId, IdentityLinkType.PARTICIPANT); } return identityLinkEntity; }注意,IdentityLink有一个Type,有一些默认的Type:
public void addCandidateUser(String userId) { addIdentityLink(userId, null, IdentityLinkType.CANDIDATE); }
public void addCandidateGroup(String groupId) { addIdentityLink(null, groupId, IdentityLinkType.CANDIDATE); }
2. IdentityLink与权限过滤
如下查询语句对应于“用户kermit待签收任务列表”的调用过程:
Preparing: select distinct RES.* from ACT_RU_TASK RES inner join ACT_RU_IDENTITYLINK I on I.TASK_ID_ = RES.ID_ WHERE RES.ASSIGNEE_ is null and I.TYPE_ = 'candidate' and ( I.USER_ID_ = ? or I.GROUP_ID_ IN ( ? , ? ) ) Parameters: kermit(String), admin(String), management(String)其中admin和management来自于用户群组关系查询接口:
UserEntityManager.findGroupsByUser("kermit")