preserve API information needed for detecting annotations on defs. fixes #232

compile/api/APIUtil.scala

@@ -55,8 +55,9 @@ object APIUtil
 		}
 	def minimizeClass(c: ClassLike): ClassLike =
 	{
+		val savedAnnotations = Discovery.defAnnotations(c.structure, (_: Any) => true).toArray[String]
 		val struct = minimizeStructure(c.structure, c.definitionType == DefinitionType.Module)
-		new ClassLike(c.definitionType, lzy(emptyType), lzy(struct), c.typeParameters, c.name, c.access, c.modifiers, c.annotations)
+		new ClassLike(c.definitionType, lzy(emptyType), lzy(struct), savedAnnotations, c.typeParameters, c.name, c.access, c.modifiers, c.annotations)
 	}
 
 	def minimizeStructure(s: Structure, isModule: Boolean): Structure =

compile/api/ClassToAPI.scala

@@ -47,8 +47,8 @@ object ClassToAPI
 		val name = c.getName
 		val tpe = if(Modifier.isInterface(c.getModifiers)) Trait else ClassDef
 		lazy val (static, instance) = structure(c, enclPkg, cmap)
-		val cls = new api.ClassLike(tpe, strict(Empty), lzy(instance), typeParameters(c.getTypeParameters), name, acc, mods, annots)
-		val stat = new api.ClassLike(Module, strict(Empty), lzy(static), emptyTypeParameterArray, name, acc, mods, annots)
+		val cls = new api.ClassLike(tpe, strict(Empty), lzy(instance), emptyStringArray, typeParameters(c.getTypeParameters), name, acc, mods, annots)
+		val stat = new api.ClassLike(Module, strict(Empty), lzy(static), emptyStringArray, emptyTypeParameterArray, name, acc, mods, annots)
 		val defs = cls :: stat :: Nil
 		cmap(c.getName) = defs
 		defs
@@ -68,6 +68,7 @@ object ClassToAPI
 	}
 	def lzy[T <: AnyRef](t: => T): xsbti.api.Lazy[T] = xsbti.SafeLazy(t)
 
+	private val emptyStringArray = new Array[String](0)
 	private val emptyTypeArray = new Array[xsbti.api.Type](0)
 	private val emptyAnnotationArray = new Array[xsbti.api.Annotation](0)
 	private val emptyTypeParameterArray = new Array[xsbti.api.TypeParameter](0)

compile/api/Discovery.scala

@@ -19,17 +19,14 @@ class Discovery(baseClasses: Set[String], annotations: Set[String])
 		}
 	def discover(c: ClassLike): Discovered =
 	{
-		val onClass = findAnnotations(c.annotations)
-		val onDefs = defAnnotations(c.structure.declared) ++ defAnnotations(c.structure.inherited)
+		val onClass = Discovery.findAnnotations(c.annotations, annotations)
+		val onDefs = Discovery.defAnnotations(c.structure, annotations) ++ c.savedAnnotations.filter(annotations)
 		val module = isModule(c)
 		new Discovered( bases(c.name, c.structure.parents), onClass ++ onDefs, module && hasMainMethod(c), module )
 	}
 	def bases(own: String, c: Seq[Type]): Set[String] =
 		(own +: c.flatMap(simpleName)).filter(baseClasses).toSet
-	def findAnnotations(as: Seq[Annotation]): Set[String] =
-		as.flatMap { a => simpleName(a.base).filter(annotations) }.toSet
-	def defAnnotations(defs: Seq[Definition]): Set[String] =
-		findAnnotations( defs.flatMap { case d: Def if isPublic(d) => d.annotations.toSeq; case _ => Nil } )
+
 }
 object Discovery
 {
@@ -41,6 +38,13 @@ object Discovery
 	def applications(definitions: Seq[Definition]): Seq[(Definition, Discovered)] =
 		apply(Set.empty, Set.empty)( definitions )
 
+	def findAnnotations(as: Seq[Annotation], pred: String => Boolean): Set[String] =
+		as.flatMap { a => simpleName(a.base).filter(pred) }.toSet
+	def defAnnotations(s: Structure, pred: String => Boolean): Set[String] =
+		defAnnotations(s.declared, pred) ++ defAnnotations(s.inherited, pred)
+	def defAnnotations(defs: Seq[Definition], pred: String => Boolean): Set[String] =
+		findAnnotations( defs.flatMap { case d: Def if isPublic(d) => d.annotations.toSeq; case _ => Nil }, pred )
+
 	def isConcrete(a: Definition): Boolean = isConcrete(a.modifiers)
 	def isConcrete(m: Modifiers) = !m.isAbstract
 	def isPublic(a: Definition): Boolean = isPublic(a.access)

compile/interface/API.scala

@@ -58,6 +58,8 @@ final class API(val global: Global, val callback: xsbti.AnalysisCallback) extend
 	private[this] val classLikeCache = new HashMap[(Symbol,Symbol), xsbti.api.ClassLike]
 	private[this] val pending = new HashSet[xsbti.api.Lazy[_]]
 
+	private[this] val emptyStringArray = new Array[String](0)
+
 	// to mitigate "temporary leaks" like that caused by NoPhase in 2.8.0,
 	//   this ensures this class is not retaining objects
 	private def clearCaches()
@@ -345,7 +347,7 @@ final class API(val global: Global, val callback: xsbti.AnalysisCallback) extend
 				else DefinitionType.Module
 			}
 			else DefinitionType.ClassDef
-		new xsbti.api.ClassLike(defType, lzy(selfType(in, c)), lzy(structure(in, struct)), typeParameters(in, c), name, getAccess(c), getModifiers(c), annotations(in, c))
+		new xsbti.api.ClassLike(defType, lzy(selfType(in, c)), lzy(structure(in, struct)), emptyStringArray, typeParameters(in, c), name, getAccess(c), getModifiers(c), annotations(in, c))
 	}
 	private final class TopLevelHandler(sourceFile: File) extends TopLevelTraverser
 	{

compile/src/test/scala/ApplicationsTest.scala

@@ -127,7 +127,7 @@ object ApplicationsTest extends Specification
 		}
 	}
 	def applications(callback: xsbti.TestCallback): Seq[(File, String)] =
-		for( (file, api) <- callback.apis.toSeq;
+		for( (file, api) <- CallbackTest.apis(callback);
 	x = println("\n" + file + ":\n" + (api.definitions.flatMap { case c: xsbti.api.ClassLike => c.structure.inherited.filter(_.name == "main"); case _ => Nil }).map(xsbt.api.DefaultShowAPI.apply).mkString("\n"));
  application <- applications(api))
 			yield	(file, application)

compile/src/test/scala/DetectAnnotations.scala

@@ -54,7 +54,7 @@ object DetectAnnotations extends Specification
 		}
 	}
 	def subclasses(callback: xsbti.TestCallback): Seq[(File, String, Set[String], Boolean)] =
-		for( (file, src) <- callback.apis.toSeq; (definition, discovered) <- Discovery(Set.empty, annotationNames)(src.definitions) if !discovered.isEmpty ) yield
+		for( (file, src) <- CallbackTest.apis(callback); (definition, discovered) <- Discovery(Set.empty, annotationNames)(src.definitions) if !discovered.isEmpty ) yield
 			(file, definition.name, discovered.annotations, discovered.isModule)
 
 	def annotationNames = Set("c.A", "B", "d.C")

compile/src/test/scala/DetectSubclasses.scala

@@ -37,7 +37,7 @@ object DetectSubclasses extends Specification
 		}
 	}
 	def subclasses(callback: xsbti.TestCallback): Seq[(File, String, Set[String], Boolean)] =
-		for( (file, src) <- callback.apis.toSeq; (definition, discovered) <- Discovery(subclassNames, Set.empty)(src.definitions) if !discovered.isEmpty ) yield
+		for( (file, src) <- CallbackTest.apis(callback); (definition, discovered) <- Discovery(subclassNames, Set.empty)(src.definitions) if !discovered.isEmpty ) yield
 			(file, definition.name, discovered.baseClasses, discovered.isModule)
 	def subclassNames = Set( "a.Super", "Super2", "x.Super3", "Super4")
 }

compile/src/test/scala/TestCompile.scala

@@ -36,4 +36,6 @@ object CallbackTest
 		withTemporaryDirectory { outputDir =>
 			TestCompile(scalaVersion, sources, outputDir, Nil) { case (callback, instance, log) => f(callback, outputDir, instance, log) }
 		}
+	def apis(callback: xsbti.TestCallback) =
+		callback.apis.toSeq map { case (src, api) => (src, xsbt.api.APIUtil.minimize(api)) }
 }

interface/definition

@@ -16,6 +16,7 @@ Definition
 			definitionType: DefinitionType
 			selfType: ~Type
 			structure: ~Structure
+			savedAnnotations: String*
 		TypeMember
 			TypeAlias
 				tpe: Type