Rewritten ClassUtils to not use erasured type parameters in patterns.

Thanks to this change compiler won't emit warnings about erasured type
parameters used in pattern matching.

Signed-off-by: Grzegorz Kossakowski <grek@google.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/src/main/scala/com/google/gimd/ClassUtils.scala b/src/main/scala/com/google/gimd/ClassUtils.scala
index cfb3ab8..6675987 100644
--- a/src/main/scala/com/google/gimd/ClassUtils.scala
+++ b/src/main/scala/com/google/gimd/ClassUtils.scala
@@ -30,15 +30,17 @@ object ClassUtils {
     else
       throw cannotGuessType(base)
 
-  private def beanTypeOf[Q,R](base: Class[Q], t: Type): Class[R] =
-    t match {
+  private def beanTypeOf[Q,R](base: Class[Q], t: Type): Class[R] = {
+    val c = t match {
       case t: ParameterizedType =>
         t.getActualTypeArguments()(0) match {
-          case c: Class[R] => c
+          case c: Class[_] => c
           case wrongType   => throw cannotGuessType(base)
         }
       case wrongType => throw cannotGuessType(base)
     }
+    c.asInstanceOf[Class[R]]
+  }
 
   private def cannotGuessType[Q](base: Class[Q]): IllegalStateException =
     new IllegalStateException("Cannot guess bean type wanted by " + base.getName)