refactor(LifecycleEvent): change from onInit to Lifecycle.onInit

BREAKING CHANGE

Closes #2928

modules/angular2/annotations.ts

@@ -13,12 +13,7 @@
 export {
   ComponentAnnotation,
   DirectiveAnnotation,
-  LifecycleEvent,
+  LifecycleEvent
-  onDestroy,
-  onChange,
-  onCheck,
-  onInit,
-  onAllChangesDone
 } from './src/core/annotations/annotations';
 
 export {ViewAnnotation} from 'angular2/src/core/annotations/view';

modules/angular2/src/core/annotations/annotations.ts

@@ -6,10 +6,5 @@
 export {
   Component as ComponentAnnotation,
   Directive as DirectiveAnnotation,
-  LifecycleEvent,
+  LifecycleEvent
-  onDestroy,
-  onChange,
-  onCheck,
-  onInit,
-  onAllChangesDone
 } from '../annotations_impl/annotations';

modules/angular2/src/core/annotations_impl/annotations.ts

@@ -933,130 +933,132 @@ export class Component extends Directive {
  * - `onCheck`,
  * - `onAllChangesDone`
  */
-@CONST()
+export enum LifecycleEvent {
-export class LifecycleEvent {
+  /**
-  constructor(public name: string) {}
+   * Notify a directive whenever a {@link View} that contains it is destroyed.
+   *
+   * ## Example
+   *
+   * ```
+   * @Directive({
+   *   ...,
+   *   lifecycle: [LifecycleEvent.onDestroy]
+   * })
+   * class ClassSet {
+   *   onDestroy() {
+   *     // invoked to notify directive of the containing view destruction.
+   *   }
+   * }
+   * ```
+   * @exportedAs angular2/annotations
+   */
+  onDestroy,
+
+
+  /**
+   * Notify a directive when any of its bindings have changed.
+   *
+   * This method is called right after the directive's bindings have been checked,
+   * and before any of its children's bindings have been checked.
+   *
+   * It is invoked only if at least one of the directive's bindings has changed.
+   *
+   * ## Example:
+   *
+   * ```
+   * @Directive({
+   *   selector: '[class-set]',
+   *   properties: [
+   *     'propA',
+   *     'propB'
+   *   ],
+   *   lifecycle: [LifecycleEvent.onChange]
+   * })
+   * class ClassSet {
+   *   propA;
+   *   propB;
+   *   onChange(changes:{[idx: string, PropertyUpdate]}) {
+   *     // This will get called after any of the properties have been updated.
+   *     if (changes['propA']) {
+   *       // if propA was updated
+   *     }
+   *     if (changes['propA']) {
+   *       // if propB was updated
+   *     }
+   *   }
+   * }
+   *  ```
+   * @exportedAs angular2/annotations
+   */
+  onChange,
+
+  /**
+   * Notify a directive when it has been checked.
+   *
+   * This method is called right after the directive's bindings have been checked,
+   * and before any of its children's bindings have been checked.
+   *
+   * It is invoked every time even when none of the directive's bindings has changed.
+   *
+   * ## Example:
+   *
+   * ```
+   * @Directive({
+   *   selector: '[class-set]',
+   *   lifecycle: [LifecycleEvent.onCheck]
+   * })
+   * class ClassSet {
+   *   onCheck() {
+   *   }
+   * }
+   *  ```
+   * @exportedAs angular2/annotations
+   */
+  onCheck,
+
+  /**
+   * Notify a directive when it has been checked the first itme.
+   *
+   * This method is called right after the directive's bindings have been checked,
+   * and before any of its children's bindings have been checked.
+   *
+   * It is invoked only once.
+   *
+   * ## Example:
+   *
+   * ```
+   * @Directive({
+   *   selector: '[class-set]',
+   *   lifecycle: [LifecycleEvent.onInit]
+   * })
+   * class ClassSet {
+   *   onInit() {
+   *   }
+   * }
+   *  ```
+   * @exportedAs angular2/annotations
+   */
+  onInit,
+
+  /**
+   * Notify a directive when the bindings of all its children have been checked (whether they have
+   * changed or not).
+   *
+   * ## Example:
+   *
+   * ```
+   * @Directive({
+   *   selector: '[class-set]',
+   *   lifecycle: [LifecycleEvent.onAllChangesDone]
+   * })
+   * class ClassSet {
+   *
+   *   onAllChangesDone() {
+   *   }
+   *
+   * }
+   *  ```
+   * @exportedAs angular2/annotations
+   */
+  onAllChangesDone
 }
-
-/**
- * Notify a directive whenever a {@link View} that contains it is destroyed.
- *
- * ## Example
- *
- * ```
- * @Directive({
- *   ...,
- *   lifecycle: [onDestroy]
- * })
- * class ClassSet {
- *   onDestroy() {
- *     // invoked to notify directive of the containing view destruction.
- *   }
- * }
- * ```
- */
-export const onDestroy: LifecycleEvent = CONST_EXPR(new LifecycleEvent("onDestroy"));
-
-
-/**
- * Notify a directive when any of its bindings have changed.
- *
- * This method is called right after the directive's bindings have been checked,
- * and before any of its children's bindings have been checked.
- *
- * It is invoked only if at least one of the directive's bindings has changed.
- *
- * ## Example:
- *
- * ```
- * @Directive({
- *   selector: '[class-set]',
- *   properties: [
- *     'propA',
- *     'propB'
- *   ],
- *   lifecycle: [onChange]
- * })
- * class ClassSet {
- *   propA;
- *   propB;
- *   onChange(changes:{[idx: string, PropertyUpdate]}) {
- *     // This will get called after any of the properties have been updated.
- *     if (changes['propA']) {
- *       // if propA was updated
- *     }
- *     if (changes['propA']) {
- *       // if propB was updated
- *     }
- *   }
- * }
- *  ```
- */
-export const onChange: LifecycleEvent = CONST_EXPR(new LifecycleEvent("onChange"));
-
-/**
- * Notify a directive when it has been checked.
- *
- * This method is called right after the directive's bindings have been checked,
- * and before any of its children's bindings have been checked.
- *
- * It is invoked every time even when none of the directive's bindings has changed.
- *
- * ## Example:
- *
- * ```
- * @Directive({
- *   selector: '[class-set]',
- *   lifecycle: [onCheck]
- * })
- * class ClassSet {
- *   onCheck() {
- *   }
- * }
- *  ```
- */
-export const onCheck: LifecycleEvent = CONST_EXPR(new LifecycleEvent("onCheck"));
-
-/**
- * Notify a directive when it has been checked the first itme.
- *
- * This method is called right after the directive's bindings have been checked,
- * and before any of its children's bindings have been checked.
- *
- * It is invoked only once.
- *
- * ## Example:
- *
- * ```
- * @Directive({
- *   selector: '[class-set]',
- *   lifecycle: [onInit]
- * })
- * class ClassSet {
- *   onInit() {
- *   }
- * }
- *  ```
- */
-export const onInit: LifecycleEvent = CONST_EXPR(new LifecycleEvent("onInit"));
-
-/**
- * Notify a directive when the bindings of all its children have been checked (whether they have
- * changed or not).
- *
- * ## Example:
- *
- * ```
- * @Directive({
- *   selector: '[class-set]',
- *   lifecycle: [onAllChangesDone]
- * })
- * class ClassSet {
- *
- *   onAllChangesDone() {
- *   }
- *
- * }
- *  ```
- */
-export const onAllChangesDone: LifecycleEvent = CONST_EXPR(new LifecycleEvent("onAllChangesDone"));

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

@@ -11,15 +11,15 @@ bool hasLifecycleHook(LifecycleEvent e, type, Directive annotation) {
     final List interfaces = reflector.interfaces(type);
     var interface;
 
-    if (e == onChange) {
+    if (e == LifecycleEvent.onChange) {
       interface = OnChange;
-    } else if (e == onDestroy) {
+    } else if (e == LifecycleEvent.onDestroy) {
       interface = OnDestroy;
-    } else if (e == onAllChangesDone) {
+    } else if (e == LifecycleEvent.onAllChangesDone) {
       interface = OnAllChangesDone;
-    } else if (e == onCheck) {
+    } else if (e == LifecycleEvent.onCheck) {
       interface = OnCheck;
-    } else if (e == onInit) {
+    } else if (e == LifecycleEvent.onInit) {
       interface = OnInit;
     }
 

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

@@ -6,6 +6,20 @@ export function hasLifecycleHook(e: LifecycleEvent, type, annotation: Directive)
     return annotation.lifecycle.indexOf(e) !== -1;
   } else {
     if (!(type instanceof Type)) return false;
-    return e.name in(<any>type).prototype;
+    var proto = (<any>type).prototype;
+    switch (e) {
+      case LifecycleEvent.onAllChangesDone:
+        return !!proto.onAllChangesDone;
+      case LifecycleEvent.onChange:
+        return !!proto.onChange;
+      case LifecycleEvent.onCheck:
+        return !!proto.onCheck;
+      case LifecycleEvent.onDestroy:
+        return !!proto.onDestroy;
+      case LifecycleEvent.onInit:
+        return !!proto.onInit;
+      default:
+        return false;
+    }
   }
 }

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

@@ -41,15 +41,7 @@ import * as avmModule from './view_manager';
 import {ViewContainerRef} from './view_container_ref';
 import {ElementRef} from './element_ref';
 import {ProtoViewRef, ViewRef} from './view_ref';
-import {
+import {Directive, Component, LifecycleEvent} from 'angular2/src/core/annotations_impl/annotations';
-  Directive,
-  Component,
-  onChange,
-  onDestroy,
-  onCheck,
-  onInit,
-  onAllChangesDone
-} from 'angular2/src/core/annotations_impl/annotations';
 import {hasLifecycleHook} from './directive_lifecycle_reflector';
 import {ChangeDetector, ChangeDetectorRef, Pipes} from 'angular2/change_detection';
 import {QueryList} from './query_list';
@@ -253,11 +245,11 @@ export class DirectiveBinding extends ResolvedBinding {
       properties: ann.properties,
       readAttributes: DirectiveBinding._readAttributes(deps),
 
-      callOnDestroy: hasLifecycleHook(onDestroy, rb.key.token, ann),
+      callOnDestroy: hasLifecycleHook(LifecycleEvent.onDestroy, rb.key.token, ann),
-      callOnChange: hasLifecycleHook(onChange, rb.key.token, ann),
+      callOnChange: hasLifecycleHook(LifecycleEvent.onChange, rb.key.token, ann),
-      callOnCheck: hasLifecycleHook(onCheck, rb.key.token, ann),
+      callOnCheck: hasLifecycleHook(LifecycleEvent.onCheck, rb.key.token, ann),
-      callOnInit: hasLifecycleHook(onInit, rb.key.token, ann),
+      callOnInit: hasLifecycleHook(LifecycleEvent.onInit, rb.key.token, ann),
-      callOnAllChangesDone: hasLifecycleHook(onAllChangesDone, rb.key.token, ann),
+      callOnAllChangesDone: hasLifecycleHook(LifecycleEvent.onAllChangesDone, rb.key.token, ann),
 
       changeDetection: ann instanceof Component ? ann.changeDetection : null,
 

modules/angular2/src/directives/class.ts

@@ -1,4 +1,4 @@
-import {Directive, onCheck} from 'angular2/annotations';
+import {Directive, LifecycleEvent} from 'angular2/annotations';
 import {ElementRef} from 'angular2/core';
 import {Pipes} from 'angular2/src/change_detection/pipes/pipes';
 import {Pipe} from 'angular2/src/change_detection/pipes/pipe';
@@ -28,7 +28,8 @@ import {ListWrapper, StringMapWrapper, isListLikeIterable} from 'angular2/src/fa
  * </div>
  * ```
  */
-@Directive({selector: '[class]', lifecycle: [onCheck], properties: ['rawClass: class']})
+@Directive(
+    {selector: '[class]', lifecycle: [LifecycleEvent.onCheck], properties: ['rawClass: class']})
 export class CSSClass {
   _pipe: Pipe;
   _rawClass;

modules/angular2/src/directives/ng_for.ts

@@ -1,5 +1,12 @@
 import {Directive} from 'angular2/annotations';
-import {ViewContainerRef, ViewRef, ProtoViewRef, Pipes, onCheck, Pipe} from 'angular2/angular2';
+import {
+  ViewContainerRef,
+  ViewRef,
+  ProtoViewRef,
+  Pipes,
+  LifecycleEvent,
+  Pipe
+} from 'angular2/angular2';
 import {isPresent, isBlank} from 'angular2/src/facade/lang';
 
 /**
@@ -32,7 +39,8 @@ import {isPresent, isBlank} from 'angular2/src/facade/lang';
  * - `<li template="ng-for #item of items; #i = index">...</li>`
  * - `<template ng-for #item [ng-for-of]="items" #i="index"><li>...</li></template>`
  */
-@Directive({selector: '[ng-for][ng-for-of]', properties: ['ngForOf'], lifecycle: [onCheck]})
+@Directive(
+    {selector: '[ng-for][ng-for-of]', properties: ['ngForOf'], lifecycle: [LifecycleEvent.onCheck]})
 export class NgFor {
   _ngForOf: any;
   _pipe: Pipe;

modules/angular2/src/directives/ng_style.ts

@@ -1,4 +1,4 @@
-import {Directive, onCheck} from 'angular2/annotations';
+import {Directive, LifecycleEvent} from 'angular2/annotations';
 import {ElementRef} from 'angular2/core';
 import {Pipe} from 'angular2/src/change_detection/pipes/pipe';
 import {Pipes} from 'angular2/src/change_detection/pipes/pipes';
@@ -27,7 +27,11 @@ import {Renderer} from 'angular2/src/render/api';
  * - `<div ng-style="{'text-align': alignEpr}"></div>`
  * - `<div ng-style="styleExp"></div>`
  */
-@Directive({selector: '[ng-style]', lifecycle: [onCheck], properties: ['rawStyle: ng-style']})
+@Directive({
+  selector: '[ng-style]',
+  lifecycle: [LifecycleEvent.onCheck],
+  properties: ['rawStyle: ng-style']
+})
 export class NgStyle {
   _pipe: Pipe;
   _rawStyle;

modules/angular2/src/forms/directives/ng_control_group.ts

@@ -1,4 +1,4 @@
-import {Directive, onDestroy, onInit} from 'angular2/annotations';
+import {Directive, LifecycleEvent} from 'angular2/angular2';
 import {Inject, Ancestor, forwardRef, Binding} from 'angular2/di';
 import {List, ListWrapper} from 'angular2/src/facade/collection';
 import {CONST_EXPR} from 'angular2/src/facade/lang';
@@ -52,7 +52,7 @@ const controlGroupBinding =
   selector: '[ng-control-group]',
   hostInjector: [controlGroupBinding],
   properties: ['name: ng-control-group'],
-  lifecycle: [onInit, onDestroy],
+  lifecycle: [LifecycleEvent.onInit, LifecycleEvent.onDestroy],
   exportAs: 'form'
 })
 export class NgControlGroup extends ControlContainer {

modules/angular2/src/forms/directives/ng_control_name.ts

@@ -2,8 +2,7 @@ import {CONST_EXPR} from 'angular2/src/facade/lang';
 import {EventEmitter, ObservableWrapper} from 'angular2/src/facade/async';
 import {List, StringMapWrapper, StringMap} from 'angular2/src/facade/collection';
 
-import {Directive, Query, onDestroy, onChange} from 'angular2/annotations';
+import {Directive, LifecycleEvent, Query, QueryList} from 'angular2/angular2';
-import {QueryList} from 'angular2/core';
 import {forwardRef, Ancestor, Binding, Inject} from 'angular2/di';
 
 import {ControlContainer} from './control_container';
@@ -76,7 +75,7 @@ const controlNameBinding =
   hostInjector: [controlNameBinding],
   properties: ['name: ngControl', 'model: ngModel'],
   events: ['update: ngModel'],
-  lifecycle: [onDestroy, onChange],
+  lifecycle: [LifecycleEvent.onDestroy, LifecycleEvent.onChange],
   exportAs: 'form'
 })
 export class NgControlName extends NgControl {

modules/angular2/src/forms/directives/ng_form_control.ts

@@ -2,8 +2,7 @@ import {CONST_EXPR} from 'angular2/src/facade/lang';
 import {StringMapWrapper} from 'angular2/src/facade/collection';
 import {EventEmitter, ObservableWrapper} from 'angular2/src/facade/async';
 
-import {Directive, Query, onChange} from 'angular2/annotations';
+import {Directive, LifecycleEvent, Query, QueryList} from 'angular2/angular2';
-import {QueryList} from 'angular2/core';
 import {forwardRef, Ancestor, Binding} from 'angular2/di';
 
 import {NgControl} from './ng_control';
@@ -64,7 +63,7 @@ const formControlBinding =
   hostInjector: [formControlBinding],
   properties: ['form: ngFormControl', 'model: ngModel'],
   events: ['update: ngModel'],
-  lifecycle: [onChange],
+  lifecycle: [LifecycleEvent.onChange],
   exportAs: 'form'
 })
 export class NgFormControl extends NgControl {

modules/angular2/src/forms/directives/ng_form_model.ts

@@ -2,7 +2,7 @@ import {CONST_EXPR} from 'angular2/src/facade/lang';
 import {List, ListWrapper} from 'angular2/src/facade/collection';
 import {ObservableWrapper, EventEmitter} from 'angular2/src/facade/async';
 
-import {Directive, onChange} from 'angular2/annotations';
+import {Directive, LifecycleEvent} from 'angular2/angular2';
 import {forwardRef, Binding} from 'angular2/di';
 import {NgControl} from './ng_control';
 import {NgControlGroup} from './ng_control_group';
@@ -84,7 +84,7 @@ const formDirectiveBinding =
   selector: '[ng-form-model]',
   hostInjector: [formDirectiveBinding],
   properties: ['form: ng-form-model'],
-  lifecycle: [onChange],
+  lifecycle: [LifecycleEvent.onChange],
   host: {
     '(submit)': 'onSubmit()',
   },

modules/angular2/src/forms/directives/ng_model.ts

@@ -2,8 +2,7 @@ import {CONST_EXPR} from 'angular2/src/facade/lang';
 import {EventEmitter, ObservableWrapper} from 'angular2/src/facade/async';
 import {StringMapWrapper} from 'angular2/src/facade/collection';
 
-import {Directive, Query, onChange} from 'angular2/annotations';
+import {Directive, LifecycleEvent, QueryList, Query} from 'angular2/angular2';
-import {QueryList} from 'angular2/core';
 import {forwardRef, Ancestor, Binding} from 'angular2/di';
 
 import {NgControl} from './ng_control';
@@ -34,7 +33,7 @@ const formControlBinding = CONST_EXPR(new Binding(NgControl, {toAlias: forwardRe
   hostInjector: [formControlBinding],
   properties: ['model: ngModel'],
   events: ['update: ngModel'],
-  lifecycle: [onChange],
+  lifecycle: [LifecycleEvent.onChange],
   exportAs: 'form'
 })
 export class NgModel extends NgControl {

modules/angular2/src/forms/directives/select_control_value_accessor.ts

@@ -1,6 +1,5 @@
 import {Renderer} from 'angular2/render';
-import {ElementRef, QueryList} from 'angular2/core';
+import {ElementRef, QueryList, Directive, Query} from 'angular2/angular2';
-import {Directive, Query, onDestroy, onChange} from 'angular2/annotations';
 
 import {NgControl} from './ng_control';
 import {ControlValueAccessor} from './control_value_accessor';

modules/angular2/src/transform/common/directive_metadata_reader.dart

@@ -261,7 +261,7 @@ class _DirectiveMetadataVisitor extends Object
           '$lifecycleValue');
     }
     ListLiteral l = lifecycleValue;
-    var lifecycleEvents = l.elements.map((s) => s.toSource());
+    var lifecycleEvents = l.elements.map((s) => s.toSource().split('.').last);
     _callOnDestroy = lifecycleEvents.contains("onDestroy");
     _callOnChange = lifecycleEvents.contains("onChange");
     _callOnCheck = lifecycleEvents.contains("onCheck");

modules/angular2/test/core/compiler/directive_lifecycle_spec.dart

@@ -19,7 +19,7 @@ main() {
 
         it("should be true when the lifecycle includes onChange", () {
           expect(metadata(DirectiveNoHooks,
-              new Directive(lifecycle: [onChange])).callOnChange).toBe(true);
+              new Directive(lifecycle: [LifecycleEvent.onChange])).callOnChange).toBe(true);
         });
 
         it("should be false otherwise", () {
@@ -41,7 +41,7 @@ main() {
 
         it("should be true when the lifecycle includes onDestroy", () {
           expect(metadata(DirectiveNoHooks,
-              new Directive(lifecycle: [onDestroy])).callOnDestroy).toBe(true);
+              new Directive(lifecycle: [LifecycleEvent.onDestroy])).callOnDestroy).toBe(true);
         });
 
         it("should be false otherwise", () {
@@ -59,7 +59,7 @@ main() {
 
         it("should be true when the lifecycle includes onCheck", () {
           expect(metadata(DirectiveNoHooks,
-              new Directive(lifecycle: [onCheck])).callOnCheck).toBe(true);
+              new Directive(lifecycle: [LifecycleEvent.onCheck])).callOnCheck).toBe(true);
         });
 
         it("should be false otherwise", () {
@@ -77,7 +77,7 @@ main() {
 
         it("should be true when the lifecycle includes onInit", () {
           expect(metadata(DirectiveNoHooks,
-              new Directive(lifecycle: [onInit])).callOnInit).toBe(true);
+              new Directive(lifecycle: [LifecycleEvent.onInit])).callOnInit).toBe(true);
         });
 
         it("should be false otherwise", () {
@@ -94,7 +94,7 @@ main() {
 
         it("should be true when the lifecycle includes onAllChangesDone", () {
           expect(metadata(DirectiveNoHooks, new Directive(
-              lifecycle: [onAllChangesDone])).callOnAllChangesDone).toBe(true);
+              lifecycle: [LifecycleEvent.onAllChangesDone])).callOnAllChangesDone).toBe(true);
         });
 
         it("should be false otherwise", () {

modules/angular2/test/core/compiler/directive_lifecycle_spec.ts

@@ -14,14 +14,7 @@ import {
   proxy
 } from 'angular2/test_lib';
 
-import {
+import {Directive, LifecycleEvent} from 'angular2/src/core/annotations_impl/annotations';
-  Directive,
-  onChange,
-  onDestroy,
-  onCheck,
-  onInit,
-  onAllChangesDone
-} from 'angular2/src/core/annotations_impl/annotations';
 import {DirectiveBinding} from 'angular2/src/core/compiler/element_injector';
 
 export function main() {
@@ -37,7 +30,8 @@ export function main() {
         });
 
         it("should be true when the lifecycle includes onChange", () => {
-          expect(metadata(DirectiveNoHooks, new Directive({lifecycle: [onChange]})).callOnChange)
+          expect(metadata(DirectiveNoHooks, new Directive({lifecycle: [LifecycleEvent.onChange]}))
+                     .callOnChange)
               .toBe(true);
         });
 
@@ -57,7 +51,8 @@ export function main() {
         });
 
         it("should be true when the lifecycle includes onDestroy", () => {
-          expect(metadata(DirectiveNoHooks, new Directive({lifecycle: [onDestroy]})).callOnDestroy)
+          expect(metadata(DirectiveNoHooks, new Directive({lifecycle: [LifecycleEvent.onDestroy]}))
+                     .callOnDestroy)
               .toBe(true);
         });
 
@@ -72,7 +67,8 @@ export function main() {
         });
 
         it("should be true when the lifecycle includes onDestroy", () => {
-          expect(metadata(DirectiveNoHooks, new Directive({lifecycle: [onInit]})).callOnInit)
+          expect(metadata(DirectiveNoHooks, new Directive({lifecycle: [LifecycleEvent.onInit]}))
+                     .callOnInit)
               .toBe(true);
         });
 
@@ -86,7 +82,8 @@ export function main() {
         });
 
         it("should be true when the lifecycle includes onCheck", () => {
-          expect(metadata(DirectiveNoHooks, new Directive({lifecycle: [onCheck]})).callOnCheck)
+          expect(metadata(DirectiveNoHooks, new Directive({lifecycle: [LifecycleEvent.onCheck]}))
+                     .callOnCheck)
               .toBe(true);
         });
 
@@ -102,7 +99,8 @@ export function main() {
         });
 
         it("should be true when the lifecycle includes onAllChangesDone", () => {
-          expect(metadata(DirectiveNoHooks, new Directive({lifecycle: [onAllChangesDone]}))
+          expect(metadata(DirectiveNoHooks,
+                          new Directive({lifecycle: [LifecycleEvent.onAllChangesDone]}))
                      .callOnAllChangesDone)
               .toBe(true);
         });

modules/angular2/test/core/compiler/dynamic_component_loader_spec.ts

@@ -21,7 +21,7 @@ import {
 
 import {Injector} from 'angular2/di';
 import {NgIf} from 'angular2/directives';
-import {Component, View, onDestroy} from 'angular2/annotations';
+import {Component, View, LifecycleEvent} from 'angular2/annotations';
 import * as viewAnn from 'angular2/src/core/annotations_impl/view';
 import {DynamicComponentLoader} from 'angular2/src/core/compiler/dynamic_component_loader';
 import {ElementRef} from 'angular2/src/core/compiler/element_ref';
@@ -267,7 +267,7 @@ class DynamicallyCreatedComponentService {}
 @Component({
   selector: 'hello-cmp',
   viewInjector: [DynamicallyCreatedComponentService],
-  lifecycle: [onDestroy]
+  lifecycle: [LifecycleEvent.onDestroy]
 })
 @View({template: "{{greeting}}"})
 class DynamicallyCreatedCmp {

modules/angular2/test/core/compiler/element_injector_spec.ts

@@ -38,7 +38,7 @@ import {
   Query,
   Component,
   Directive,
-  onDestroy
+  LifecycleEvent
 } from 'angular2/annotations';
 import {bind, Injector, Binding, Optional, Inject, Injectable, Self, Parent, Ancestor, Unbounded, InjectMetadata, ParentMetadata} from 'angular2/di';
 import {AppProtoView, AppView} from 'angular2/src/core/compiler/view';
@@ -831,7 +831,7 @@ export function main() {
           it("should call onDestroy on directives subscribed to this event", () => {
             var inj = injector(ListWrapper.concat(
                 [DirectiveBinding.createFromType(DirectiveWithDestroy,
-                                                 new dirAnn.Directive({lifecycle: [onDestroy]}))],
+                                                 new dirAnn.Directive({lifecycle: [LifecycleEvent.onDestroy]}))],
                 extraBindings));
             var destroy = inj.get(DirectiveWithDestroy);
             inj.dehydrate();

modules/angular2/test/core/compiler/integration_dart_spec.dart

@@ -195,7 +195,7 @@ class NoPropertyAccess {
 
 @Component(selector: 'on-change',
     // TODO: needed because of https://github.com/angular/angular/issues/2120
-    lifecycle: const [onChange], properties: const ['prop'])
+    lifecycle: const [LifecycleEvent.onChange], properties: const ['prop'])
 @View(template: '')
 class OnChangeComponent implements OnChange {
   Map changes;

modules/angular2/test/core/directive_lifecycle_integration_spec.ts

@@ -14,15 +14,7 @@ import {
 } from 'angular2/test_lib';
 
 import {ListWrapper} from 'angular2/src/facade/collection';
-import {
+import {Directive, Component, View, LifecycleEvent} from 'angular2/angular2';
-  Directive,
-  Component,
-  View,
-  onCheck,
-  onInit,
-  onChange,
-  onAllChangesDone
-} from 'angular2/angular2';
 import * as viewAnn from 'angular2/src/core/annotations_impl/view';
 
 export function main() {
@@ -62,7 +54,12 @@ export function main() {
 @Directive({
   selector: "[lifecycle]",
   properties: ['field'],
-  lifecycle: [onChange, onCheck, onInit, onAllChangesDone]
+  lifecycle: [
+    LifecycleEvent.onChange,
+    LifecycleEvent.onCheck,
+    LifecycleEvent.onInit,
+    LifecycleEvent.onAllChangesDone
+  ]
 })
 class LifecycleDir {
   field;

modules/angular2/test/transform/directive_metadata_extractor/directive_metadata_files/changeDetection.ng_deps.dart

@@ -8,11 +8,7 @@ import 'package:angular2/angular2.dart'
         Directive,
         View,
         NgElement,
-        onChange,
+        LifecycleEvent;
-        onDestroy,
-        onInit,
-        onCheck,
-        onAllChangesDone;
 
 var _visited = false;
 void initReflector(reflector) {

modules/angular2/test/transform/directive_metadata_extractor/directive_metadata_files/directive_export_as.ng_deps.dart

@@ -8,11 +8,7 @@ import 'package:angular2/angular2.dart'
         Directive,
         View,
         NgElement,
-        onChange,
+        LifecycleEvent;
-        onDestroy,
-        onInit,
-        onCheck,
-        onAllChangesDone;
 
 var _visited = false;
 void initReflector(reflector) {

modules/angular2/test/transform/directive_metadata_extractor/directive_metadata_files/events.ng_deps.dart

@@ -8,11 +8,7 @@ import 'package:angular2/angular2.dart'
         Directive,
         View,
         NgElement,
-        onChange,
+        LifecycleEvent;
-        onDestroy,
-        onInit,
-        onCheck,
-        onAllChangesDone;
 
 var _visited = false;
 void initReflector(reflector) {

modules/angular2/test/transform/directive_metadata_extractor/directive_metadata_files/lifecycle.ng_deps.dart

@@ -8,11 +8,7 @@ import 'package:angular2/angular2.dart'
         Directive,
         View,
         NgElement,
-        onChange,
+        LifecycleEvent;
-        onDestroy,
-        onInit,
-        onCheck,
-        onAllChangesDone;
 
 var _visited = false;
 void initReflector(reflector) {
@@ -24,7 +20,8 @@ void initReflector(reflector) {
       'parameters': const [const []],
       'annotations': const [
         const Component(
-            lifecycle: [onChange, onDestroy, onInit, onCheck, onAllChangesDone])
+            lifecycle: [LifecycleEvent.onChange, LifecycleEvent.onDestroy, LifecycleEvent.onInit,
+                        LifecycleEvent.onCheck, LifecycleEvent.onAllChangesDone])
       ]
     });
 }

modules/angular2_material/src/components/button/button.ts

@@ -1,4 +1,4 @@
-import {Component, View, onChange} from 'angular2/angular2';
+import {Component, View, LifecycleEvent} from 'angular2/angular2';
 import {isPresent} from 'angular2/src/facade/lang';
 
 
@@ -13,7 +13,7 @@ export class MdButton {
   selector: '[md-button][href]',
   properties: ['disabled'],
   host: {'(click)': 'onClick($event)', '[tabIndex]': 'tabIndex'},
-  lifecycle: [onChange]
+  lifecycle: [LifecycleEvent.onChange]
 })
 @View({templateUrl: 'angular2_material/src/components/button/button.html'})
 export class MdAnchor {

modules/angular2_material/src/components/grid_list/grid_list.ts

@@ -1,4 +1,4 @@
-import {Component, View, Parent, onDestroy, onChange, onAllChangesDone} from 'angular2/angular2';
+import {Component, View, Parent, LifecycleEvent} from 'angular2/angular2';
 
 import {ListWrapper} from 'angular2/src/facade/collection';
 import {StringWrapper, isPresent, isString, NumberWrapper} from 'angular2/src/facade/lang';
@@ -14,7 +14,7 @@ import {Math} from 'angular2/src/facade/math';
 @Component({
   selector: 'md-grid-list',
   properties: ['cols', 'rowHeight', 'gutterSize'],
-  lifecycle: [onAllChangesDone]
+  lifecycle: [LifecycleEvent.onAllChangesDone]
 })
 @View({templateUrl: 'angular2_material/src/components/grid_list/grid_list.html'})
 export class MdGridList {
@@ -221,7 +221,7 @@ export class MdGridList {
     '[style.paddingTop]': 'stylePaddingTop',
     '[attr.role]': '"listitem"'
   },
-  lifecycle: [onDestroy, onChange]
+  lifecycle: [LifecycleEvent.onDestroy, LifecycleEvent.onChange]
 })
 @View({templateUrl: 'angular2_material/src/components/grid_list/grid_tile.html'})
 export class MdGridTile {

modules/angular2_material/src/components/input/input.ts

@@ -1,4 +1,4 @@
-import {Directive, onAllChangesDone, Attribute, Parent} from 'angular2/angular2';
+import {Directive, LifecycleEvent, Attribute, Parent} from 'angular2/angular2';
 
 import {ObservableWrapper, EventEmitter} from 'angular2/src/facade/async';
 
@@ -9,7 +9,7 @@ import {ObservableWrapper, EventEmitter} from 'angular2/src/facade/async';
 
 @Directive({
   selector: 'md-input-container',
-  lifecycle: [onAllChangesDone],
+  lifecycle: [LifecycleEvent.onAllChangesDone],
   host:
       {'[class.md-input-has-value]': 'inputHasValue', '[class.md-input-focused]': 'inputHasFocus'}
 })

modules/angular2_material/src/components/progress-linear/progress_linear.ts

@@ -1,11 +1,11 @@
-import {Component, onChange, View, Attribute} from 'angular2/angular2';
+import {Component, LifecycleEvent, View, Attribute} from 'angular2/angular2';
 
 import {isPresent, isBlank} from 'angular2/src/facade/lang';
 import {Math} from 'angular2/src/facade/math';
 
 @Component({
   selector: 'md-progress-linear',
-  lifecycle: [onChange],
+  lifecycle: [LifecycleEvent.onChange],
   properties: ['value', 'bufferValue'],
   host: {
     '[attr.role]': '"progressbar"',

modules/angular2_material/src/components/radio/radio_button.ts

@@ -1,4 +1,12 @@
-import {Component, View, onChange, Parent, Ancestor, Attribute, Optional} from 'angular2/angular2';
+import {
+  Component,
+  View,
+  LifecycleEvent,
+  Parent,
+  Ancestor,
+  Attribute,
+  Optional
+} from 'angular2/angular2';
 
 import {isPresent, StringWrapper, NumberWrapper} from 'angular2/src/facade/lang';
 import {ObservableWrapper, EventEmitter} from 'angular2/src/facade/async';
@@ -24,7 +32,7 @@ var _uniqueIdCounter: number = 0;
 
 @Component({
   selector: 'md-radio-group',
-  lifecycle: [onChange],
+  lifecycle: [LifecycleEvent.onChange],
   events: ['change'],
   properties: ['disabled', 'value'],
   host: {
@@ -179,7 +187,7 @@ export class MdRadioGroup {
 
 @Component({
   selector: 'md-radio-button',
-  lifecycle: [onChange],
+  lifecycle: [LifecycleEvent.onChange],
   properties: ['id', 'name', 'value', 'checked', 'disabled'],
   host: {
     '(keydown)': 'onKeydown($event)',