RFR 8186961 Class.getFields() does not return fields of previously visited super interfaces/classes.

Paul Sandoz paul.sandoz at oracle.com
Wed Nov 29 20:15:44 UTC 2017


Please review:

  http://cr.openjdk.java.net/~psandoz/jdk10/JDK-8186961-iface-static-fields-get/webrev/ <http://cr.openjdk.java.net/~psandoz/jdk10/JDK-8186961-iface-static-fields-get/webrev/>

There is a bug lurking, perhaps for a while, where diamond patterns for interface hierarchies can result in the incorrect reporting of fields when using reflection, see the test case.

Since reflection data is cached i don’t see an advantage to retaining a set of of traversed interfaces, which is the root cause of the issue.

The code is optimized for common cases and will for less common cases collect fields of interfaces into a temporary linked hash set (to preserve the order, perhaps not strictly necessary but i did not want to change that behaviour).


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