RFR: 8360131: Remove use of soon-to-be-removed APIs by CTW framework

Fri Jun 20 15:05:29 UTC 2025

On Fri, 20 Jun 2025 14:33:49 GMT, David Beaumont <duke at openjdk.org> wrote:

> Migrate the CWT framework to use only supported JRT file system access for fetching class bytes.
> This avoids accessing APIs in ImageReader which are scheduled to be removed as part of preview mode class support in Valhalla (essentially these APIs are "too low level" and expose semantics that are incompatible with supporting preview classes in Valhalla).
> 
> This will be a further change to this code when the preview mode work goes in, but this will be limited to how the file system is opened (with or without preview mode).

LGTM

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PR Comment: https://git.openjdk.org/jdk/pull/25916#issuecomment-2991954336