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

[harold seigel]

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