RFR: 8351565: Implement JEP 502: Stable Values (Preview)

[Johannes Graham]

On Mon, 10 Mar 2025 18:11:23 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> Implement JEP 502.
> 
> The PR passes tier1-tier3 tests.

src/java.base/share/classes/java/util/ImmutableCollections.java line 772:

> 770: 
> 771:     @jdk.internal.ValueBased
> 772:     static final class StableList<E> extends AbstractImmutableList<E> {

Is there significant reuse gained by putting StableList in ImmutableCollection? The back-and-forth between here and SV through SharedSecrets is a little awkward.

src/java.base/share/classes/java/util/ImmutableCollections.java line 1462:

> 1460: 
> 1461:     static final class StableMap<K, V>
> 1462:             extends AbstractImmutableMap<K, V> {

Same question about whether StableMap needs to go here. Though there’s more stuff going on for maps than lists here.

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PR Review Comment: https://git.openjdk.org/jdk/pull/23972#discussion_r1988220230
PR Review Comment: https://git.openjdk.org/jdk/pull/23972#discussion_r1988222063