Split MirrorsData methods and MirrorsDataImpl data by element kind.

pkg/compiler/lib/src/js_emitter/metadata_collector.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart2js.js_emitter.metadata_collector;
 
 import 'package:js_ast/src/precedence.dart' as js_precedence;
 
 import '../common.dart';
 import '../compiler.dart' show Compiler;
 import '../constants/values.dart';
 import '../elements/resolution_types.dart'
     show ResolutionDartType, ResolutionTypedefType;
 import '../deferred_load.dart' show OutputUnit;
 import '../elements/elements.dart'
     show
+        ClassElement,
         ConstructorElement,
         Element,
+        FieldElement,
         FunctionElement,
         FunctionSignature,
+        LibraryElement,
+        MemberElement,
+        MethodElement,
         MetadataAnnotation,
         ParameterElement;
 import '../js/js.dart' as jsAst;
 import '../js/js.dart' show js;
 import '../js_backend/js_backend.dart'
     show JavaScriptBackend, TypeVariableCodegenAnalysis;
 
 import 'code_emitter_task.dart' show Emitter;
 
 /// Represents an entry's position in one of the global metadata arrays.
@@ skipping 126 matching lines @@
 
   MetadataCollector(this._compiler, this._emitter) {
     _globalMetadataMap = new Map<String, _BoundMetadataEntry>();
   }
 
   JavaScriptBackend get _backend => _compiler.backend;
   TypeVariableCodegenAnalysis get _typeVariableCodegenAnalysis =>
       _backend.typeVariableCodegenAnalysis;
   DiagnosticReporter get reporter => _compiler.reporter;
 
-  bool _mustEmitMetadataFor(Element element) {
+  jsAst.Fun buildLibraryMetadataFunction(LibraryElement element) {
+    if (!_backend.mirrorsData.mustRetainMetadata ||
+        !_backend.mirrorsData.isLibraryReferencedFromMirrorSystem(element)) {
+      return null;
+    }
+    return _buildMetadataFunction(element);
+  }
+
+  jsAst.Fun buildClassMetadataFunction(ClassElement element) {
+    if (!_backend.mirrorsData.mustRetainMetadata ||
+        !_backend.mirrorsData.isClassReferencedFromMirrorSystem(element)) {
+      return null;
+    }
+    return _buildMetadataFunction(element);
+  }
+
+  bool _mustEmitMetadataForMember(MemberElement element) {
     return _backend.mirrorsData.mustRetainMetadata &&
-        _backend.mirrorsData.referencedFromMirrorSystem(element);
+        _backend.mirrorsData.isMemberReferencedFromMirrorSystem(element);
+  }
+
+  jsAst.Fun buildFieldMetadataFunction(FieldElement element) {
+    if (!_mustEmitMetadataForMember(element)) return null;
+    return _buildMetadataFunction(element);
   }
 
   /// The metadata function returns the metadata associated with
   /// [element] in generated code.  The metadata needs to be wrapped
   /// in a function as it refers to constants that may not have been
   /// constructed yet.  For example, a class is allowed to be
   /// annotated with itself.  The metadata function is used by
   /// mirrors_patch to implement DeclarationMirror.metadata.
-  jsAst.Fun buildMetadataFunction(Element element) {
-    if (!_mustEmitMetadataFor(element)) return null;
+  jsAst.Fun _buildMetadataFunction(Element element) {
     return reporter.withCurrentElement(element, () {
       List<jsAst.Expression> metadata = <jsAst.Expression>[];
       for (MetadataAnnotation annotation in element.metadata) {
         ConstantValue constant =
             _backend.constants.getConstantValueForMetadata(annotation);
         if (constant == null) {
           reporter.internalError(annotation, 'Annotation value is null.');
         } else {
           metadata.add(_emitter.constantReference(constant));
         }
@@ skipping 128 matching lines @@
     });
   }
 
   jsAst.Expression _computeTypeRepresentation(ResolutionDartType type,
       {ignoreTypeVariables: false}) {
     jsAst.Expression representation =
         _backend.rtiEncoder.getTypeRepresentation(type, (variable) {
       if (ignoreTypeVariables) return new jsAst.LiteralNull();
       return _typeVariableCodegenAnalysis.reifyTypeVariable(variable.element);
     }, (ResolutionTypedefType typedef) {
-      return _backend.mirrorsData.isAccessibleByReflection(typedef.element);
+      return _backend.mirrorsData
+          .isTypedefAccessibleByReflection(typedef.element);
     });
 
     if (representation is jsAst.LiteralString) {
       // We don't want the representation to be a string, since we use
       // strings as indicator for non-initialized types in the lazy emitter.
       reporter.internalError(
           NO_LOCATION_SPANNABLE, 'reified types should not be strings.');
     }
 
     return representation;
   }
 
   jsAst.Expression addTypeInOutputUnit(
       ResolutionDartType type, OutputUnit outputUnit,
       {ignoreTypeVariables: false}) {
     if (_typesMap[outputUnit] == null) {
       _typesMap[outputUnit] =
           new Map<ResolutionDartType, _BoundMetadataEntry>();
     }
     return _typesMap[outputUnit].putIfAbsent(type, () {
       return new _BoundMetadataEntry(_computeTypeRepresentation(type,
           ignoreTypeVariables: ignoreTypeVariables));
     });
   }
 
-  List<jsAst.DeferredNumber> computeMetadata(FunctionElement element) {
+  List<jsAst.DeferredNumber> computeMetadata(MethodElement element) {
     return reporter.withCurrentElement(element, () {
-      if (!_mustEmitMetadataFor(element)) return const <jsAst.DeferredNumber>[];
+      if (!_mustEmitMetadataForMember(element))
+        return const <jsAst.DeferredNumber>[];
       List<jsAst.DeferredNumber> metadata = <jsAst.DeferredNumber>[];
       for (MetadataAnnotation annotation in element.metadata) {
         metadata.add(reifyMetadata(annotation));
       }
       return metadata;
     });
   }
 
   @override
   void finalizeTokens() {
@@ skipping 60 matching lines @@
     if (token is _ForwardingMetadataEntry && !token.isBound) {
       _foundUnboundToken = true;
     }
   }
 
   bool findUnboundPlaceholders(jsAst.Node node) {
     node.accept(this);
     return _foundUnboundToken;
   }
 }