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Re: Accessibility of suBclass-fields from suPERclass (reflection)

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On 8/16/2014 6:37 PM, Andreas Leitgeb wrote:
> Robert Klemme <shortcutter@googlemail.com> wrote:
>> On 16.08.2014 10:46, Andreas Leitgeb wrote:
>>> I'm not complaining about that extra setAccessibility(true), I just
>>> would like to see an example of where a Base-class accessing its children
>>> could be a security issue.  I'm not talking of some arbitrary class
>>> attempting access, but about the target class's parent (or grandparent)
>>> class.
>
>> If you want a superclass to access subclass state you need to provide
>> means for it, e.g. defining abstract accessor or other methods in the
>> base class which then must be implemented in subclasses.
>
> I'll describe my situation a bit:
>
> I have a special Base class, and each of its subclasses serve exactly
> one purpose: a collection of name/value associations where the java-
> compiler knows about the valid names, so as to detect accesses to
> non-existing names already at compile-time.  (without that last premise,
> I would have used HashMaps instead of subclasses)

     Would an EnumMap serve?

> Overall-operations, (e.g. resetting all values of a given subclass
> instance) are done from Base-class by use of reflection.

     Why by reflection?  Why not by a reset() method, abstract in
the superclass?

     I'm confident you have reasons, but I'm sure I haven't yet
grasped them.


-- 
esosman@comcast-dot-net.invalid

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Accessibility of suBclass-fields from suPERclass (reflection) Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-15 00:58 +0000
  Re: Accessibility of suBclass-fields from suPERclass (reflection) Lew <lewbloch@gmail.com> - 2014-08-15 15:20 -0700
    Re: Accessibility of suBclass-fields from suPERclass (reflection) Steven Simpson <ss@domain.invalid> - 2014-08-16 00:11 +0100
      Re: Accessibility of suBclass-fields from suPERclass (reflection) Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-16 00:10 +0000
  Re: Accessibility of suBclass-fields from suPERclass (reflection) Arne Vajhøj <arne@vajhoej.dk> - 2014-08-15 23:26 -0400
    Re: Accessibility of suBclass-fields from suPERclass (reflection) Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-16 08:46 +0000
      Re: Accessibility of suBclass-fields from suPERclass (reflection) Robert Klemme <shortcutter@googlemail.com> - 2014-08-16 12:27 +0200
        Re: Accessibility of suBclass-fields from suPERclass (reflection) "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2014-08-16 13:37 +0100
          Re: Accessibility of suBclass-fields from suPERclass (reflection) Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-08-16 09:47 -0400
          Re: Accessibility of suBclass-fields from suPERclass (reflection) Robert Klemme <shortcutter@googlemail.com> - 2014-08-17 13:19 +0200
        Re: Accessibility of suBclass-fields from suPERclass (reflection) Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-16 22:37 +0000
          Re: Accessibility of suBclass-fields from suPERclass (reflection) Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-08-16 20:22 -0400
            Re: Accessibility of suBclass-fields from suPERclass (reflection) Josip Almasi <joe@vrspace.org> - 2014-08-17 12:51 +0200
              Re: Accessibility of suBclass-fields from suPERclass (reflection) Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-08-17 07:54 -0400
                Re: Accessibility of suBclass-fields from suPERclass (reflection) "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2014-08-17 13:44 +0100
                Re: Accessibility of suBclass-fields from suPERclass (reflection) Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-17 17:42 +0000
                Re: Accessibility of suBclass-fields from suPERclass (reflection) Arne Vajhøj <arne@vajhoej.dk> - 2014-08-18 20:45 -0400
                Re: Accessibility of suBclass-fields from suPERclass (reflection) Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-20 18:47 +0000
                Re: Accessibility of suBclass-fields from suPERclass (reflection) Josip Almasi <joe@vrspace.org> - 2014-08-18 17:19 +0200
            Re: Accessibility of suBclass-fields from suPERclass (reflection) Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-17 18:04 +0000
              Re: Accessibility of suBclass-fields from suPERclass (reflection) Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-08-17 15:24 -0400
                Re: Accessibility of suBclass-fields from suPERclass (reflection) Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-17 21:35 +0000
      Re: Accessibility of suBclass-fields from suPERclass (reflection) Josip Almasi <joe@vrspace.org> - 2014-08-16 12:31 +0200
      Re: Accessibility of suBclass-fields from suPERclass (reflection) Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-08-16 10:51 -0400
      Re: Accessibility of suBclass-fields from suPERclass (reflection) Arne Vajhøj <arne@vajhoej.dk> - 2014-08-16 11:00 -0400

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