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Re: What to do with an exception of Field.get()

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On 8/28/2015 10:22 AM, Cecil Westerhof wrote:
> On Friday 28 Aug 2015 15:37 CEST, Cecil Westerhof wrote:
>
>> I am using:
>> http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/Field.html#get%28java.lang.Object%29
>>
>> This can throw an IllegalArgumentException, or an
>> IllegalAccessException.
>>
>> I see this as an unacceptable error and I am thinking about giving a
>> stacktrace and exiting the program.
>>
>> Is this acceptable, or is it not done?
>
> Answering my own question. ;-)
>
> In principle you never know where your function is used. (If you share
> it.) So I wrote a custom exception (which gives a stacktrace). In this
> way the user only has to check for one exception (it is used in Java
> 6) and can decide what to do.

     That seems the right approach.  If you haven't done so already,
it's a good idea to propagate the original exception as the "cause"
of the one eventually thrown:

	try {
	    ...
	} catch (IllegalArgumentException | IllegalAccessException ex) {
	    throw new WrapperException("Yikes!", ex);
	}

or (if the wrapping exception lacks a suitable constructor):

	try {
	   ...
	} catch (IllegalArgumentException | IllegalAccessException ex) {
	    Exception wrapper = new WrapperException("Yikes!");
	    wrapper.initCause(ex);
	    throw wrapper;
	}

-- 
esosman@comcast-dot-net.invalid
"Don't be afraid of work. Make work afraid of you." -- TLM

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What to do with an exception of Field.get() Cecil Westerhof <Cecil@decebal.nl> - 2015-08-28 15:37 +0200
  Re: What to do with an exception of Field.get() Cecil Westerhof <Cecil@decebal.nl> - 2015-08-28 16:22 +0200
    Re: What to do with an exception of Field.get() Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-08-28 10:44 -0400
      Re: What to do with an exception of Field.get() Tassilo Horn <tsdh@gnu.org> - 2015-08-28 16:57 +0200
    Re: What to do with an exception of Field.get() Tassilo Horn <tsdh@gnu.org> - 2015-08-28 16:52 +0200

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