Re: [xsl] java Regex call

[Jeni Tennison <jeni@xxxxxxxxxxxxxxxx>]

Hi Dave,

> Why are there two lots of output please?

The <xsl:analyze-string> element works through the string that you
select (in this case 'ABC_PARA__PARA') and splits it into matching and
non-matching substrings based on the regular expression that you use
(in this case '(([^_]*)_PARA)').

Starting with the string:

  ABC_PARA__PARA

the first substring that matches (([^_]*)_PARA) is:

  ABC_PARA__PARA
  ^^^^^^^^

This starts at the first character of the string, so there's no
non-matching substring before it. The group [^_]* matches the
substring 'ABC', and the remainder of the regular expression matches
'_PARA'.

The substring that's left after this first match is:

  __PARA

The first substring of this that matches (([^_]*)_PARA) is:

  __PARA
   ^^^^^

This doesn't start at the first character, so there's a non-matching
substring of '_' first.

In the matching substring, the group [^_]* doesn't match anything
(which is OK, the * means that that it doesn't have to), and the
remainder of the regular expression matches '_PARA'.

So the string is broken into two matching substrings ('ABC_PARA' and
'_PARA') with a non-matching substring of '_' in between. And you get
two lots of output because you're generating one for each of the
matching substrings.

Cheers,

Jeni

---
Jeni Tennison
http://www.jenitennison.com/


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