hg: lambda/lambda/jdk: Pattern.splitAsStream.

[Paul Sandoz]

Hi Jürgen,

That seems useful as a more general approach than Matcher.replaceAll(String ) e.g.

  Matcher.replaceAll(Function<MatchResult, String> f)

Ben, thoughts?

Paul.

On Apr 8, 2013, at 6:59 PM, jk at blackdown.de wrote:

> Hi Paul,
> 
> it would be nice if Pattern/Matcher offered a terse way to loop over all
> matches in a string and replace them via a callback.
> 
> E.g. I'm currently using something like this:
> 
> private static final PatternAndReplacement PASS2 = new PatternAndReplacement(
>        Pattern.compile("  ( "
>                        + "   \\A \\p{Punct}*"         // start of title…
>                        + " |"
>                        + "   [:.;?!]\\ +"             // or of subsentence…
>                        + " | "
>                        + "   \\  ['\"“‘(\\[] \\ *"    // or of inserted subphrase…
>                        + ")"
>                        + "(" + SMALL_WORDS + ") \\b", // … followed by small word
>                        Pattern.COMMENTS | Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CHARACTER_CLASS),
>        m -> Matcher.quoteReplacement(m.group(1) + capitalize(m.group(2))));
> 
> with PatternAndReplacement being
> 
> private static class PatternReplacement implements Function<String, String> {
>    private final Pattern pattern;
>    private final Function<MatchResult, String> function;
> 
>    PatternReplacement(final Pattern p, final Function<MatchResult, String> f) {
>        pattern = p;
>        function = f;
>    }
> 
>    @Override
>    public final String apply(final String s) {
>        Matcher m = pattern.matcher(s);
>        if (m.find()) {
>            StringBuffer sb = new StringBuffer(s.length());
>            do {
>                m.appendReplacement(sb, function.apply(m));
>            } while (m.find());
>            return m.appendTail(sb).toString();
>        }
>        return s;
>    }
> }
> 
> Any plans for something like this?
> 
> 
> Jürgen
> 
> 
> paul.sandoz at oracle.com writes:
> 
>> Changeset: 526131346981
>> Author:    psandoz
>> Date:      2013-04-08 17:16 +0200
>> URL:       http://hg.openjdk.java.net/lambda/lambda/jdk/rev/526131346981
>> 
>> Pattern.splitAsStream.
>> Contributed-by: Ben Evans <benjamin.john.evans at gmail.com>
>> 
>> ! src/share/classes/java/util/regex/Pattern.java
>> + test-ng/tests/org/openjdk/tests/java/util/regex/PatternTest.java