1 files changed, 41 insertions, 0 deletions
diff --git a/container-di/src/main/scala/com/yahoo/container/di/package.scala b/container-di/src/main/scala/com/yahoo/container/di/package.scala
new file mode 100644
index 00000000000..f1e2a35797e
--- /dev/null
+++ b/container-di/src/main/scala/com/yahoo/container/di/package.scala
@@ -0,0 +1,41 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.container
+
+import com.yahoo.config.ConfigInstance
+import com.yahoo.vespa.config.ConfigKey
+import java.lang.reflect.Type
+import com.google.inject.Key
+
+/**
+ *
+ * @author gjoranv
+ * @author tonytv
+ */
+package object di {
+  type ConfigKeyT = ConfigKey[_ <: ConfigInstance]
+  type GuiceInjector = com.google.inject.Injector
+  type JavaAnnotation = java.lang.annotation.Annotation
+
+  def createKey(instanceType: Type, annotation: JavaAnnotation) = {
+    {if (annotation == null)
+      Key.get(instanceType)
+    else
+      Key.get(instanceType, annotation)
+    }.asInstanceOf[Key[AnyRef]]
+  }
+
+  implicit def makeClassCovariant[SUB, SUPER >: SUB](clazz: Class[SUB]) : Class[SUPER] = {
+    clazz.asInstanceOf[Class[SUPER]]
+  }
+
+  def removeStackTrace(exception: RuntimeException): RuntimeException = {
+    if (preserveStackTrace) exception
+    else {
+      exception.setStackTrace(Array())
+      exception
+    }
+  }
+
+  //For debug purposes only
+  val preserveStackTrace: Boolean = Option(System.getProperty("jdisc.container.preserveStackTrace")).filterNot(_.isEmpty).isDefined
+}
+\ No newline at end of file