gitgabrio opened a new issue, #1448:
URL: https://github.com/apache/incubator-kie-issues/issues/1448
TCK Tests revealed some cases where matches() wrongly behaves.
1. matches("O", "[A-Z-[OI]]", "i") should return false. Before fixing
that, double-check in the specs that this is the expected behavior
2. matches("i", "[A-Z-[OI]]", "i") should return false. Before fixing
that, double-check in the specs that this is the expected behavior
This syntax is invalid for java Pattern
`[A-Z-[OI]]`
and correct one is
`[A-Z&&[^OI]]` (see **_Character classes_** in
[docs](https://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html))
[XML Schema Part 2: Datatypes Second
Edition](https://www.w3.org/TR/xmlschema-2/)
makes a distinction between _negation_ (`ˆ`) and _subtraction_ (`-`)
See "Negative Character Group" and "Character Class Subtraction" at [regex
chapter](https://www.w3.org/TR/xmlschema-2/#regexs).
_**A negative character group is a [·positive character
group·](https://www.w3.org/TR/xmlschema-2/#dt-poschargroup) preceded by the ^
character. For all [·positive character
group·](https://www.w3.org/TR/xmlschema-2/#dt-poschargroup)s P, ^P is a valid
negative character group, and C(^P) contains all XML characters that are not in
C(P).**_
_**A character class subtraction is a [·character class
expression·](https://www.w3.org/TR/xmlschema-2/#dt-charexpr) subtracted from a
[·positive character
group·](https://www.w3.org/TR/xmlschema-2/#dt-poschargroup) or [·negative
character group·](https://www.w3.org/TR/xmlschema-2/#dt-negchargroup), using
the - character.**_
A "translation" between the different syntax is required
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