Request for review: 8017611: Auto corrector for mistyped vm options

[Tao Mao]

Hi Harold,

This CR only deals with correcting VM option *names*.

If this case needs to be resolved, it would be better to create another 
CR. See how many outcomes you'll get when you try out "~!@#$%^&*()_+" to 
replace "=" here.

Thanks.
Tao

On 6/26/13 2:45 PM, harold seigel wrote:
> Hi Tao,
>
> This is a big help.
>
> In a case like this:
>
>      % $JAVA_HOME/bin/java -XX:ObjectAlignmentInBytes:16 -version
>    Unrecognized VM option 'ObjectAlignmentInBytes:16'
>
>
> would it ask you:  Did you mean ObjectAlignmentInBytes*=* ?
>
> Thanks, Harold
>
> On 6/26/2013 5:19 PM, Tao Mao wrote:
>> new webrev:
>> http://cr.openjdk.java.net/~tamao/8017611/webrev.01/
>>
>> diff from the last webrev:
>> (1) put more restrictive type check when passing strings.
>> (2) move VMOptionsFuzzyMatchSimilarity to be a local constant.
>> (3) simplify routine str_similar()
>> (4) add jtreg test
>>
>> Suggestions are taken from Dmitry, Bengt, Vladimir and Christian. 
>> Thank you all.
>>
>> Tao
>>
>>
>> On 6/25/13 10:44 AM, Tao Mao wrote:
>>> I'm kinda tired of mistyping VM options and figuring it out 
>>> "mentally"...let machines do it then.
>>>
>>> changeset:
>>> Currently, when we mistype VM options you will get the warning as 
>>> following
>>>
>>> $java -XX:+UseParalelGC -version
>>> Unrecognized VM option 'UseParalelGC'
>>>
>>> I think we can do one step further to interpret the user's intent 
>>> and suggest the correct VM options. Then i start to imagine that we 
>>> have something like this
>>>
>>> $java -XX:+UseParalelGC -version
>>> Unrecognized VM option 'UseParalelGC'
>>> Did you mean 'UseParallelGC'?
>>>
>>> Please refer to the wikipedia 
>>> http://en.wikipedia.org/wiki/S%C3%B8rensen%E2%80%93Dice_coefficient 
>>> to get an idea of obtaining string similarity. This new feature is 
>>> based on this theory.
>>>
>>> webrev:
>>> http://cr.openjdk.java.net/~tamao/8017611/webrev.00/
>>>
>>> Please try out this patch and see if it meets some need.
>>>
>>> Thanks.
>>> Tao
>