我有许多具有相同逻辑的查询,因此我决定将其提取为闭包。
这里是一个例子:
Closure whereByProjectIdAndUser = { Criteria cr, Long projectId, User user ->
Long userId = user.id
Boolean isReviewer = user.isReviewer()
cr.isNull 'project.deletedAt'
cr.eq 'project.id', projectId
(cr | {
cr.eq 'owner.id', userId
if (isReviewer) {
cr & {
cr.eq 'reviewer.id', userId
cr.ne 'project.certificationStatus', ProjectCertificationStatus.None
}
}
})
}
@Transactional(readOnly = true)
RrmUtilization[] getAllByProjectIdAndUser(Long projectId, User user) {
BuildableCriteria cr = RrmUtilization.createCriteria()
RrmUtilization[] result = cr.list {
createAlias('project', 'project', JoinType.INNER_JOIN)
createAlias('project.owner', 'owner', JoinType.INNER_JOIN)
createAlias('project.reviewer', 'reviewer', JoinType.LEFT_OUTER_JOIN)
isNull 'deletedAt'
whereByProjectIdAndUser(cr, projectId, user)
} as RrmUtilization[]
result
}
这很好,但是,我试图了解如何避免将BuildableCriteria显式传递给闭包?有没有办法让它隐式传递并获得更好的代码?
也许总体上有一些更好的方法?
答案 0 :(得分:0)
您可以使用关键字this
来访问闭包的封闭类中的参数。