1 files changed, 31 insertions, 0 deletions
diff --git a/src/compiler/scala/reflect/macros/runtime/JavaReflectionRuntimes.scala b/src/compiler/scala/reflect/macros/runtime/JavaReflectionRuntimes.scala
new file mode 100644
index 0000000000..3ef11fad9d
--- /dev/null
+++ b/src/compiler/scala/reflect/macros/runtime/JavaReflectionRuntimes.scala
@@ -0,0 +1,31 @@
+package scala.reflect.macros
+package runtime
+
+import scala.reflect.runtime.ReflectionUtils
+import scala.reflect.macros.{Context => ApiContext}
+
+trait JavaReflectionRuntimes {
+  self: scala.tools.nsc.typechecker.Analyzer =>
+
+  trait JavaReflectionResolvers {
+    self: MacroRuntimeResolver =>
+
+    import global._
+
+    def resolveJavaReflectionRuntime(classLoader: ClassLoader): MacroRuntime = {
+      val implClass = Class.forName(className, true, classLoader)
+      val implMeths = implClass.getDeclaredMethods.find(_.getName == methName)
+      // relies on the fact that macro impls cannot be overloaded
+      // so every methName can resolve to at maximum one method
+      val implMeth = implMeths getOrElse { throw new NoSuchMethodException(s"$className.$methName") }
+      macroLogVerbose(s"successfully loaded macro impl as ($implClass, $implMeth)")
+      args => {
+        val implObj =
+          if (isBundle) implClass.getConstructor(classOf[ApiContext]).newInstance(args.c)
+          else ReflectionUtils.staticSingletonInstance(implClass)
+        val implArgs = if (isBundle) args.others else args.c +: args.others
+        implMeth.invoke(implObj, implArgs.asInstanceOf[Seq[AnyRef]]: _*)
+      }
+    }
+  }
+}
+\ No newline at end of file