RFR: 8367007: javadoc generation of JavaFX docs fails after fix for JDK-8350920

[Chen Liang]

On Tue, 9 Sep 2025 10:16:42 GMT, Hannes Wallnöfer <hannesw at openjdk.org> wrote:

> Please review a change to fix a regression when documenting inherited JavaFX property members after [JDK-8350920](https://bugs.openjdk.org/browse/JDK-8350920). The wrong `PropertyHelper` instance was used to initialize synthetic doc comments on property members, leading to potentially missing comments.
> 
> Since using the correct `PropertyHelper` instance would have led to property info being computed multiple times (previously it was only needed in `ClassWriter`), I added caching of `PropertyHelper` instances in the enclosing `PropertyUtils` instance. In the process I also removed some unnecessary fields from `PropertyHelper`, made the property member map lazily initialized, and cleaned up code and doc comments in `PropertyUtils` a bit.
> 
> The test adds a new subclass to a property-holding class in `TestJavaFX` to make sure inherited property members are documented correctly and no warnings are issued for missing synthetic doc comments.

Looks good. The cleanups in PropertyUtils look mostly trivial.

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Marked as reviewed by liach (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/27168#pullrequestreview-3206858413