[9] RFR of 8075156: (prefs) remove() should disallow the use of the null control character '\u0000' as key

[Brian Burkhalter]

Please review at your convenience this latest patch modified from the previous one pursuant to the most recent comments.

Issue:	https://bugs.openjdk.java.net/browse/JDK-8075156
Patch:	http://cr.openjdk.java.net/~bpb/8075156/webrev.01/

Summary:

* Revise Preferences javadoc to indicate IAE for put*(), get*(), and remove() for NUL control character U+0000 in the key and / or value, as appropriate.
* Extend fix of put*() in JDK-8068373 to all platforms by moving functional code up to to AbstractPreferences.
* Add fix for get*() and remove() in AbstractPreferences.
* Revert FileSystemPreferences changes from JDK-8068373 as these are now handled by AbstractPreferences (note this includes rolling back the more recent year in the copyright as well).
* Minor picayune cleanup in WindowsPreferences.
* Correct class javadoc of AbstractPreferences which had referred to flush() and sync() as returning boolean type.
* Extend existing test to get() and remove() cases.

Test passed on all the usual platforms.

The CCC request will need to be revised or a new one filed, pending approval of this patch.

Thanks,

Brian

On Apr 14, 2015, at 8:37 AM, Brian Burkhalter <brian.burkhalter at oracle.com> wrote:

> So barring objections to the contrary from some other quarter, I will clean up the current patch and also address the errors in the class level javadoc that I pointed out in AbstractPreferences.