日志实现将调用请求翻译成对异常记录服务的服务调用。

The implementation of logging translates invocations requests into service calls to the exception logging service.

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在这些情况下，您应该负责抛出异常，让用户知道他们请求的操作无法按照期望执行。

You should take care to throw exceptions in these situations, so the user will know that the action could not be performed exactly as they requested.

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对于SAX和DOM工厂类，一个异常处理已请求的但不受支持的特性，另一个异常处理实例化错误。

As with the SAX and DOM factory classes, one exception handles requested — but unsupported — features, and another exception handles instantiation errors.

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