feat(reflector): added a method to get type's interfaces

Author: vsavkin

modules/angular2/src/reflection/reflection_capabilities.dart

@@ -71,6 +71,11 @@ class ReflectionCapabilities {
  return meta.map((m) => m.reflectee).toList();
  }
 
+ List interfaces(type) {
+ ClassMirror classMirror = reflectType(type);
+ return classMirror.superinterfaces.map((si) => si.reflectedType).toList();
+ }
+
  GetterFn getter(String name) {
  var symbol = new Symbol(name);
  return (receiver) => reflect(receiver).getField(symbol).reflectee;

modules/angular2/src/reflection/reflection_capabilities.ts

@@ -1,4 +1,4 @@
-import {Type, isPresent, global, stringify} from 'angular2/src/facade/lang';
+import {Type, isPresent, global, stringify, BaseException} from 'angular2/src/facade/lang';
 import {List, ListWrapper} from 'angular2/src/facade/collection';
 import {GetterFn, SetterFn, MethodFn} from './types';
 
@@ -97,6 +97,10 @@ export class ReflectionCapabilities {
  return [];
  }
 
+ interfaces(type): List<any> {
+ throw new BaseException("JavaScript does not support interfaces");
+ }
+
  getter(name: string): GetterFn { return new Function('o', 'return o.' + name + ';'); }
 
  setter(name: string): SetterFn { return new Function('o', 'v', 'return o.' + name + ' = v;'); }

modules/angular2/src/reflection/reflector.ts

@@ -52,6 +52,14 @@ export class Reflector {
  }
  }
 
+ interfaces(type): List<any> {
+ if (MapWrapper.contains(this._typeInfo, type)) {
+ return MapWrapper.get(this._typeInfo, type)["interfaces"];
+ } else {
+ return this.reflectionCapabilities.interfaces(type);
+ }
+ }
+
  getter(name: string): GetterFn {
  if (MapWrapper.contains(this._getters, name)) {
  return MapWrapper.get(this._getters, name);

modules/angular2/src/transform/template_compiler/recording_reflection_capabilities.dart

@@ -20,6 +20,8 @@ class RecordingReflectionCapabilities implements ReflectionCapabilities {
 
  List<List> parameters(typeOrFunc) => _notImplemented('parameters');
 
+ List<List> interfaces(typeOrFunc) => _notImplemented('interfaces');
+
  List annotations(typeOrFunc) => _notImplemented('annotations');
 
  GetterFn getter(String name) {

modules/angular2/test/reflection/reflector_spec.ts

@@ -1,4 +1,4 @@
-import {describe, it, iit, ddescribe, expect, beforeEach} from 'angular2/test_lib';
+import {describe, it, iit, ddescribe, expect, beforeEach, IS_DARTIUM} from 'angular2/test_lib';
 import {Reflector} from 'angular2/src/reflection/reflection';
 import {ReflectionCapabilities} from 'angular2/src/reflection/reflection_capabilities';
 import {ClassDecorator, ParamDecorator, classDecorator, paramDecorator} from './reflector_common';
@@ -40,6 +40,11 @@ class TestObj {
  identity(arg) { return arg; }
 }
 
+class Interface {}
+
+class ClassImplementingInterface implements Interface {
+}
+
 export function main() {
  describe('Reflector', () => {
  var reflector;
@@ -93,12 +98,26 @@ export function main() {
  expect(reflector.annotations(TestObj)).toEqual([1, 2]);
  });
 
- it("should work for a clas without annotations", () => {
+ it("should work for a class without annotations", () => {
  var p = reflector.annotations(ClassWithoutDecorators);
  expect(p).toEqual([]);
  });
  });
 
+ if (IS_DARTIUM) {
+ describe("interfaces", () => {
+ it("should return an array of interfaces for a type", () => {
+ var p = reflector.interfaces(ClassImplementingInterface);
+ expect(p).toEqual([Interface]);
+ });
+
+ it("should return an empty array otherwise", () => {
+ var p = reflector.interfaces(ClassWithDecorators);
+ expect(p).toEqual([]);
+ });
+ });
+ }
+
  describe("getter", () => {
  it("returns a function reading a property", () => {
  var getA = reflector.getter('a');