将扩展授权设计为一个接口也可以在实现中提供某种程度的独立性。
Designing extended authorization as an interface gives some independence from implementation as well.
其他供应商为JoinRowSet接口提供了不同的实现，这里主要研究Sun提供的参考实现。
There are other implementations of the JoinRowSet interface offered by other vendors, but I focus this study on the reference implementation provided by Sun.
如果需要，您还可以通过实现所提供的接口，为其它组件编写binder。
If you wish, you can also write your own binders for other components by implementing the provided interfaces.
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