8370160: NumericShaper allows illegal ranges

[prrace]

This is a follow-on to 8365077: java.awt.font.NumericShaper violates equals/hashCode contract

The factory method to construct a contextual shaper from a bitmask will happily store illegal, unspecified bits.
So there are still ways to create instances which violate the contract.

This isn't possible with the enum approach. We should align these two. And we should document it.

Additionally the behaviour of eliminating an value which is of lesser precedence is also something we should specify.

CSR : https://bugs.openjdk.org/browse/JDK-8370161

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change requires CSR request JDK-8370161 to be approved

Issues

• JDK-8370160: NumericShaper allows illegal ranges (Bug - P4)
• JDK-8370161: NumericShaper allows illegal ranges (CSR)

Reviewers

• Sergey Bylokhov (@mrserb - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/27884/head:pull/27884
$ git checkout pull/27884

Update a local copy of the PR:
$ git checkout pull/27884
$ git pull https://git.openjdk.org/jdk.git pull/27884/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 27884

View PR using the GUI difftool:
$ git pr show -t 27884

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/27884.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back prr! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

@prrace The following label will be automatically applied to this pull request:

• client

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing list. If you would like to change these labels, use the /label pull request command.

[mlbridge]

Webrevs

• 00: Full (7f7bb5c1)

[mrserb]

Note that this will accept the CONTEXTUAL_MASK even if it was provided by the app. It is unclear whether we should discard it in that case or not.

[prrace]

This is always added by the implementation when constructing a contextual shaper.
So when we get here it is always part of the mask argument.
The only path that gets here without a contextual shaper bit set is the single range case.
But it the app has set that there an IAE is thrown, so it can't happen.