Alternatives for Unsafe field access

[Jochen Theodorou]

On 09.12.2016 12:59, Alan Bateman wrote:
> On 09/12/2016 07:55, Jochen Theodorou wrote:
>
>>
>> Maybe we have luck here and it does not apply, but if the field comes
>> from a class of a module and is private, my current level knowledge of
>> jigsaw says, that setAccessible will fail with an exception. It does
>> not matter at all if the class with the field is exported or not. That
>> is because just before the JavaOne #AwkwardStrongEncapsulation made it
>> into jigsaw. Only way around this is to use the Lookup object that has
>> the correct rights from the beginning. How to get it... well... there
>> will be only solutions for certain types of classes.
>>
> MethodHandles.privateLookupIn [1] was recently added to get a Lookup
> with private access, it may be useful here.

I think the documentation needs some improvement to make it clear what 
lookup modes are set when. And by that I mean really using the mode 
names in the description. Just from a short lookup for example I have no 
idea when the MODULE mode is set for a Lookup and when not.

[...]
> [1]
> http://download.java.net/java/jdk9/docs/api/java/lang/invoke/MethodHandles.html#privateLookupIn-java.lang.Class-java.lang.invoke.MethodHandles.Lookup-

bye Jochen