The first approach can be used if the intermediate result that is to be computed has a fixed length and can easily be encoded in the binary string returned from the computeAggregate function.
如果待计算的中间结果长度固定，而且可以很容易地编为二进制串返回给computeaggregate函数，可以用第一种方法。
The attribute can contain the user ID of the queried person, the dn values of the group members to be evaluated implicitly or some arbitrary string(s) in case of intermediate results.
属性可以包含所查询人员的用户 ID、要隐式计算的组成员的 dn 值，或在 中间结果情况下的某个属性字符串。
In cases where the result data is a string, the intermediate result is also converted back to the input code page.
如果结果数据是一个字符串，那么中间结果也要转换回输入代码页。
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