RFR: 8341587: [premain] Support Soft/Weak Reference in AOT cache [v4]

[Mat Carter]

On Wed, 19 Feb 2025 17:07:59 GMT, Chen Liang <liach at openjdk.org> wrote:

>> I tried this before but then 'this.methodHandles = new SoftReference<MethodHandle>[MH_LIMIT];' is not allowed due to the error 'generic array creation'.  I looked at allocating using ArrayList<>(initialCapacity) as they are backed. with Object[], but then we have to add range checks on the reads to avoid IndexOutOfBounds or set a null entry at (initialCapacity-1); unless someone can suggest a better implementation I'm inclined to let it stand
>
> You can try like `(SoftReference<MethodHandle>[]) new SoftReference<?>[MH_LIMIT]`, and add `@SuppressWarnings("unchecked")` on the constructors.

I restored the code to follow the pre-JEP 483 implementation; thank you @liach and @iklam

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PR Review Comment: https://git.openjdk.org/leyden/pull/41#discussion_r1964127374