refactor(hooks): change to intrefaces

modules/angular2/src/core/compiler/directive_lifecycle_reflector.dart

@@ -1,9 +1,21 @@
 library angular2.src.core.compiler.directive_lifecycle_reflector;
 
 import 'package:angular2/src/core/reflection/reflection.dart';
+import 'package:angular2/src/core/compiler/interfaces.dart';
 
-bool hasLifecycleHook(interface, type) {
-  if (type is! Type) return false;
+const INTERFACES = const {
+  LifecycleHooks.OnInit: OnInit,
+  LifecycleHooks.OnDestroy: OnDestroy,
+  LifecycleHooks.DoCheck: DoCheck,
+  LifecycleHooks.OnChanges: OnChanges,
+  LifecycleHooks.AfterContentInit: AfterContentInit,
+  LifecycleHooks.AfterContentChecked: AfterContentChecked,
+  LifecycleHooks.AfterViewInit: AfterViewInit,
+  LifecycleHooks.AfterViewChecked: AfterViewChecked,
+};
 
-  return reflector.interfaces(type).contains(interface);
+bool hasLifecycleHook(LifecycleHooks interface, token) {
+  if (token is! Type) return false;
+  Type interfaceType = INTERFACES[interface];
+  return reflector.interfaces(token).contains(interfaceType);
 }

modules/angular2/src/core/compiler/directive_lifecycle_reflector.ts

@@ -1,27 +1,27 @@
 import {Type} from 'angular2/src/core/facade/lang';
-import * as Interfaces from './interfaces';
+import {LifecycleHooks} from './interfaces';
 
-export function hasLifecycleHook(lcInterface, type): boolean {
-  if (!(type instanceof Type)) return false;
+export function hasLifecycleHook(lcInterface: LifecycleHooks, token): boolean {
+  if (!(token instanceof Type)) return false;
 
-  var proto = (<any>type).prototype;
+  var proto = (<any>token).prototype;
 
   switch (lcInterface) {
-    case Interfaces.AfterContentInit:
+    case LifecycleHooks.AfterContentInit:
       return !!proto.afterContentInit;
-    case Interfaces.AfterContentChecked:
+    case LifecycleHooks.AfterContentChecked:
       return !!proto.afterContentChecked;
-    case Interfaces.AfterViewInit:
+    case LifecycleHooks.AfterViewInit:
       return !!proto.afterViewInit;
-    case Interfaces.AfterViewChecked:
+    case LifecycleHooks.AfterViewChecked:
       return !!proto.afterViewChecked;
-    case Interfaces.OnChanges:
+    case LifecycleHooks.OnChanges:
       return !!proto.onChanges;
-    case Interfaces.DoCheck:
+    case LifecycleHooks.DoCheck:
       return !!proto.doCheck;
-    case Interfaces.OnDestroy:
+    case LifecycleHooks.OnDestroy:
       return !!proto.onDestroy;
-    case Interfaces.OnInit:
+    case LifecycleHooks.OnInit:
       return !!proto.onInit;
     default:
       return false;

modules/angular2/src/core/compiler/element_injector.ts

@@ -51,7 +51,7 @@ import {RenderDirectiveMetadata} from 'angular2/src/core/render/api';
 import {EventConfig} from 'angular2/src/core/render/event_config';
 import {PipeBinding} from '../pipes/pipe_binding';
 
-import * as LifecycleHooks from './interfaces';
+import {LifecycleHooks} from './interfaces';
 
 var _staticKeys;
 

modules/angular2/src/core/compiler/interfaces.ts

@@ -1,5 +1,16 @@
 import {StringMap} from 'angular2/src/core/facade/collection';
 
+export enum LifecycleHooks {
+  OnInit,
+  OnDestroy,
+  DoCheck,
+  OnChanges,
+  AfterContentInit,
+  AfterContentChecked,
+  AfterViewInit,
+  AfterViewChecked
+}
+
 /**
  * Lifecycle hooks are guaranteed to be called in the following order:
  * - `OnChanges` (if any bindings have changed),
@@ -38,9 +49,7 @@ import {StringMap} from 'angular2/src/core/facade/collection';
  * }
  *  ```
  */
-export class OnChanges {
-  onChanges(changes: StringMap<string, any>): void {}
-}
+export interface OnChanges { onChanges(changes: StringMap<string, any>); }
 
 /**
  * Notify a directive when it has been checked the first time.
@@ -54,15 +63,13 @@ export class OnChanges {
  *
  * ```
  * @Component(...)
- * class MyComponent @implements OnInit {
+ * class MyComponent implements OnInit {
  *   onInit(): void {
  *   }
  * }
  *  ```
  */
-export class OnInit {
-  onInit(): void {}
-}
+export interface OnInit { onInit(); }
 
 /**
  * Overrides the default change detection.
@@ -83,9 +90,7 @@ export class OnInit {
  * }
  *  ```
  */
-export class DoCheck {
-  doCheck(): void {}
-}
+export interface DoCheck { doCheck(); }
 
 /**
  * Notify a directive whenever a {@link ViewMetadata} that contains it is destroyed.
@@ -101,9 +106,7 @@ export class DoCheck {
  * }
  * ```
  */
-export class OnDestroy {
-  onDestroy(): void {}
-}
+export interface OnDestroy { onDestroy(); }
 
 /**
  * Notify a directive when the bindings of all its content children have been checked the first
@@ -119,9 +122,7 @@ export class OnDestroy {
  * }
  *  ```
  */
-export class AfterContentInit {
-  afterContentInit(): void {}
-}
+export interface AfterContentInit { afterContentInit(); }
 
 /**
  * Notify a directive when the bindings of all its content children have been checked (whether
@@ -137,9 +138,7 @@ export class AfterContentInit {
  * }
  *  ```
  */
-export class AfterContentChecked {
-  afterContentChecked(): void {}
-}
+export interface AfterContentChecked { afterContentChecked(); }
 
 /**
  * Notify a directive when the bindings of all its view children have been checked the first time
@@ -155,9 +154,7 @@ export class AfterContentChecked {
  * }
  *  ```
  */
-export class AfterViewInit {
-  afterViewInit(): void {}
-}
+export interface AfterViewInit { afterViewInit(); }
 
 /**
  * Notify a directive when the bindings of all its view children have been checked (whether they
@@ -173,6 +170,4 @@ export class AfterViewInit {
  * }
  *  ```
  */
-export class AfterViewChecked {
-  afterViewChecked(): void {}
-}
+export interface AfterViewChecked { afterViewChecked(); }