1 files changed, 9 insertions, 2 deletions
diff --git a/src/main/scala/firrtl/annotations/AnnotationUtils.scala b/src/main/scala/firrtl/annotations/AnnotationUtils.scala
index 240c46d6..0fc192a6 100644
--- a/src/main/scala/firrtl/annotations/AnnotationUtils.scala
+++ b/src/main/scala/firrtl/annotations/AnnotationUtils.scala
@@ -3,15 +3,22 @@
 package firrtl
 package annotations
 
+import org.json4s._
+import org.json4s.native.JsonMethods._
+import org.json4s.native.Serialization
+import org.json4s.native.Serialization.{read, write, writePretty}
+
 import net.jcazevedo.moultingyaml._
 import firrtl.annotations.AnnotationYamlProtocol._
 
 import firrtl.ir._
 import firrtl.Utils.error
 
+class InvalidAnnotationFileException(msg: String) extends Exception(msg)
+
 object AnnotationUtils {
-  def toYaml(a: Annotation): String = a.toYaml.prettyPrint
-  def fromYaml(s: String): Annotation = s.parseYaml.convertTo[Annotation]
+  def toYaml(a: LegacyAnnotation): String = a.toYaml.prettyPrint
+  def fromYaml(s: String): LegacyAnnotation = s.parseYaml.convertTo[LegacyAnnotation]
 
   /** Returns true if a valid Module name */
   val SerializedModuleName = """([a-zA-Z_][a-zA-Z_0-9~!@#$%^*\-+=?/]*)""".r