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Can getCapability throw, or must it return null?


josephcsible

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If hasCapability would return false for a given capability and facing, must getCapability return null for the same capability and facing, or may it throw an exception? Conversely, may you call getCapability and test for null instead of calling hasCapability?

Edited by josephcsible
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I imagine that if you return false from has, then get won't even be called in most cases. In the rest, I imagine that the caller would perform a null check.

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7 hours ago, diesieben07 said:

Oh yes, that definitely exists.

It doesn't answer the question, which was:

Would anything bad happen if the has/get contract is broken?

Obviously if you say "true" and return "null" then yes, but he's specifically asking for situations where has returns false.

 

The "do I need to call has or can I just check null?" question you and I talked about before.

Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable.  If you think this is the case, JUST REPORT ME.  Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.

 

Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked.

 

DO NOT PM ME WITH PROBLEMS. No help will be given.

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