invoke* on a MethodHandle

[John Rose]

On Feb 5, 2009, at 1:12 AM, Rémi Forax wrote:

> By the way, the current prototype rely on getMethod (not  
> getDeclaredMethod) to find callable methods,
> so it's only possible to reify public methods.
> Is it a known limitation of the current prototype or is the spec  
> will only allow find* on public methods ?

No, unless we run into technical problems or fundamental security  
hazards, the JVM-level functionality should be able to ignore access  
bits.  The access checking will be done at MH creation, as carefully  
as necessary, but after that point all MHs are created equal.

>> For convenient browsing and review, I have posted the javadoc  
>> extracted from the current sources here:
>>
>> http://webrev.invokedynamic.info/jrose/6655638.meth.jdoc/
>>
>> This API is not yet official.  Comments would be welcome!
> The doc of MethodHandle says it's possible to create a MethodHandle  
> using a
> LDC on Methodref/InterfaceMethodRef.
>
> "Bytecode in an extended JVM can directly obtain a method handle for  
> any accessible method from a |ldc| instruction which refers to a | 
> CONSTANT_Methodref| or |CONSTANT_InterfaceMethodref| constant pool  
> entry. "
>
> What is the position of the JSR292 EG on this ?

Nothing is decided yet on that, and that feature may drop away if  
there's no demand for it.  But it is a very natural feature, from the  
JVM perspective.

-- John