Reflection and Java package private methods

[Paul Butcher]

How can I determine if a method in a Java class is package private? The documentation for privateWithin says:

     *  The java access levels translate as follows:

     *

     *  java private:     isPrivate                  && (privateWithin == NoSymbol)

     *  java package:     !isPrivate && !isProtected && (privateWithin == enclosingPackage)

     *  java protected:   isProtected                && (privateWithin == enclosingPackage)

     *  java public:      !isPrivate && !isProtected && (privateWithin == NoSymbol)

However, here's what I get for getPrefixLength in java.io.File (which is package private):

Welcome to Scala version 2.10.0 (Java HotSpot(TM) 64-Bit Server VM, Java 1.7.0_09).

Type in expressions to have them evaluated.

Type :help for more information.

scala> import reflect.runtime.universe._

import reflect.runtime.universe._

scala> val t = weakTypeOf[java.io.File]

t: reflect.runtime.universe.Type = java.io.File

scala> val m = t.member(newTermName("getPrefixLength"))

m: reflect.runtime.universe.Symbol = method getPrefixLength

scala> m.isPrivate

res0: Boolean = false

scala> m.isProtected

res1: Boolean = false

scala> m.privateWithin

res2: reflect.runtime.universe.Symbol = <none>

scala> m.isPublic

res3: Boolean = true

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[Eugene Burmako]

Let's also ask Paul.