java.lang.reflect.Method.copyOf

[Paul Sandoz]

> On 14 Oct 2015, at 16:15, Remi Forax <forax at univ-mlv.fr> wrote:
> 
> ----- Mail original -----
>> De: "Paul Sandoz" <paul.sandoz at oracle.com>
>> Cc: "core-libs-dev" <core-libs-dev at openjdk.java.net>
>> Envoyé: Mercredi 14 Octobre 2015 13:46:38
>> Objet: Re: java.lang.reflect.Method.copyOf
>> 
>> 
>>> On 14 Oct 2015, at 12:38, Remi Forax <forax at univ-mlv.fr> wrote:
>>> 
>>> Given that j.l.r.Method is mutable, the best way to have performance is too
>>> encapsulate it in a non mutable class, if possible.
>>> 
>>> As far as i know j.l.r.Method was introduced in Java 1.1 as non mutable and
>>> become mutable with Java 1.2, (yes, someone seriously fucked up !)
>> 
>> Some harsh language there :-) I don’t know the full history but i like to
>> think this may have been a frustrating compromise due to some demanding
>> serialization requirements under a tight schedule.
> 
> Methods are not serializable.

One of the primary motivations for the introduction of the accessibility bit was serialization:

* <p>Setting the {@code accessible} flag in a reflected object
* permits sophisticated applications with sufficient privilege, such
* as Java Object Serialization or other persistence mechanisms, to
* manipulate objects in a manner that would normally be prohibited.

Paul.