Create a Java7 ReflectionProvider

[lucascs]

On java 7 we can use MethodHandle's to invoke methods, constructors and getters/setters. This API is faster than pure reflection and will be even faster in Java 8.

Is this possible to adapt the reflection provider to use this new API?

[jonasabreu]

The reflection providers were created for situations like this. @asouza said he was going to take a look into it, but I don't know if he has made any progress on it.

Do you have a use case that this performance boost would be important? I'm thinking vraptor, but I don't really know enough of the internals to know if this would be the case. If it is, I believe I can spend a couple hours doing it (unless @asouza has already done it and forgot to tell us ;) )

[lucascs]

b.c.c.v.c.InvokerReflectionTest.withInvoker        avgt   1     50    1        9.488        0.176    ns/op
b.c.c.v.c.InvokerReflectionTest.withMirror         avgt   1     50    1        8.612        0.047    ns/op
b.c.c.v.c.InvokerReflectionTest.withReflection     avgt   1     50    1        8.127        0.142    ns/op

time in ns.

I don't know if the benchmark is good enough, since I don't fully understand MethodHandles yet.

based on this https://gist.github.com/garcia-jj/6758893