jmx-dev RFR: 8359809: AttributeList, RoleList and UnresolvedRoleList should never accept other types of Object

[Serguei Spitsyn]

On Tue, 17 Jun 2025 16:54:15 GMT, Kevin Walls <kevinw at openjdk.org> wrote:

> The classes javax.management.AttributeList, and javax.management.relation.RoleList and UnresolvedRoleList, have a historical feature where they accept objects of the wrong type, and only check for wrong objects when the "asList()" method is called.
> 
> This feature should be removed, and these classes should never accept the wrong kind of Object.

src/java.management/share/classes/javax/management/relation/RoleList.java line 265:

> 263:     @Override
> 264:     public boolean add(Object o) {
> 265:         checkTypeSafe(o);

Q: Is `null` allowed? The same question applies to the `addAll()` if these methods allow null to be present in the collection.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25856#discussion_r2159436534