Summary

AttributeMapper's type parameter A is now bounded by Attribute<A>.

Problem

AttributeMapper's type parameter A is supposed to be bounded by Attribute<A> but is not declared so.

Solution

Make it bounded by Attribute<A>. This only affects one use site in implementation that it no longer needs to cast a user AttributeMapper return value to Attribute<?>; other places that can access AttributeMapper, such as Attribute::attributeMapper, already bounds the returned type argument.

Note this change affects method descriptors, so technically the readAttribute and writeAttribute methods are now removed and re-added due to descriptor update from Object to Attribute.

Specification

-public interface AttributeMapper<A> {
+public interface AttributeMapper<A extends Attribute<A>> {