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From Jochen Theodorou <>
Subject Re: new MOP under Java9 module system findings
Date Sun, 01 Apr 2018 18:15:15 GMT
On 01.04.2018 19:58, MG wrote:
> Hi Jochen,
> I just thought about some post by another project I read some time back 
> (alas I can no longer remember which project exactly) which used Groovy 
> as its scripting language, but switched to a lesser, more restrictive 
> scripting option, because they needed to make the scripting more secure, 
> which, according to the post, could not be done using Groovy "because of 
> all the reflection Groovy uses". So I was wondering if changes at a 
> fundamental level in Groovy seem unavoidable, if it would make sense to 
> also keep the security aspect in mind ?

In my opinion that project is wrong, because the security manager 
mechanisms provide enough protection. The problem is that rarely anyone 
can use a security manager properly. Anyway... Groovy won't be able to 
do any call Java cannot do in principle in this version. That is not 
because of keeping security in mind, that is more because of the module 
system, that enforces this

> Of course you cannot be everything to everyone, even if Groovy comes 
> close, but if e.g. reflection usage inside a Groovy script could be 
> prohibited (afair that was one of the problems the post cited) within 
> the new, Java 9 module approach, that could conceivably make sense...

My approach does not use setAccessible anymore, which is the problematic 
part when using reflection.

bye Jochen

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