On Sun, 26 May 2024 at 08:25, Laertes Moustakas <lmous...@gmail.com> wrote:
>
> Hello Gary,
>
> Thank you for your response. Some of the new assertions indeed fail when 
> interpreting the duplicate single quote as an escaped quote instead of a 
> closing and opening quote. In particular, "y' ''years' M 'months'" is 
> interpreted as "4 'years 0 months" while the expected text lacks the quote 
> before "years". Same for "hello''world": it's interpreted as "hello'world" 
> instead of "helloworld".

Please see https://github.com/apache/commons-lang/pull/1227 for an
alternate solution.
This does not cause issues with any existing tests.

However, it does change the behaviour of a duplicate single quote
which is found outside an existing opening and closing quote.
Instead of the empty string, it generates a lone single quote.

Whilst this is a change in behaviour, it seems to me that there should
be no need for anyone to use a format that uses a pair of adjacent
single quotes to generate an empty string in the output, so it seems
unlikely that this will cause any breakages.

> I understand this brings forth a breaking change in formats that use two 
> single quotes to close and open new literals (or even add an empty string), 
> but this is consistent with what java.text.SimpleDateFormat expects. And I 
> believe that most developers would favor consistency between format strings 
> in equivalent classes. Thus, I think the cases described above where the two 
> single quotes terminate and begin a literal should no longer be supported.
>
> Should this change go forward, I expect it to be part of a major release 
> (e.g. version 4.0.0, 5.0.0, etc.) instead of 3.x.x, as it does contain a 
> breaking change.
>
> If you have more questions, please don't hesitate to contact me.
>
> Best regards,
> Laertes
>
> On 2024/05/25 13:47:23 Gary Gregory wrote:
> > Hello Laertes,
> >
> > Thank you for your interest in improving Apache Commons Lang :-)
> >
> > Do you foresee any compatibility issues for existing call sites and
> > format strings?
> >
> > For example, can you make your use cases work and still support:
> >
> > https://github.com/apache/commons-lang/blob/d861f1b2116a41a45949d1401785220119a57e56/src/test/java/org/apache/commons/lang3/time/DurationFormatUtilsTest.java#L463-L473
> >
> > Or, should these cases no longer be supported?
> >
> > TY!
> > Gary
> >
> > On Fri, May 24, 2024 at 4:15 PM Laertes Moustakas <lm...@gmail.com> wrote:
> > >
> > > Greetings,
> > >
> > > org.apache.commons.lang3.time.DurationFormatUtils contains useful methods
> > > to format a duration or period of milliseconds in the textual
> > > representation given by the format argument. It even allows arbitrary text
> > > to be printed between single quotes, on the condition that any opening
> > > single quotes will eventually close with another single quote.
> > >
> > > For example,
> > > DurationFormatUtils.formatDuration(64000L, "mm:ss")
> > > will return "01:04".
> > >
> > > While
> > > DurationFormatUtils.formatDuration(1804000L, "m'min' s'sec'")
> > > will yield "34min 4sec".
> > >
> > > However, as per the JavaDoc page for this class
> > > <https://commons.apache.org/proper/commons-lang/apidocs/org/apache/commons/lang3/time/DurationFormatUtils.html>
> > > including
> > > a single quote is currently not supported. Other classes that format
> > > datetime such as the java.text.SimpleDateFormat do, by putting two single
> > > quotes next to each other.
> > >
> > > So something like
> > > new SimpleDateFormat("mm'' ss'sec'").format(new Date()); // note the two
> > > single quotes after "mm"
> > > will return something like this:
> > > "42' 02sec"
> > >
> > > Instead,
> > > DurationFormatUtils.formatDuration(64000L, "mm'' ss'sec'")
> > > will return "01 04sec".
> > >
> > > I wish to implement support for single quotes in the DurationFormatUtils
> > > format the same way SimpleDateFormat does; by escaping it with two
> > > consecutive single quote characters. I have searched the mailing list and
> > > found no similar request. I have already tested on the copy of a source
> > > code, including adding tests, and no test throughout the commons-lang
> > > project failed.
> > >
> > > Please let me know if this is an acceptable change, and the next steps to
> > > take should this move forward.
> > >
> > > Best regards,
> > > Laertes Moustakas
> >
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