From fd0c2d8063fcb7bc6cd89b1823a02d6710e2ac31 Mon Sep 17 00:00:00 2001
From: Misko Hevery <misko@hevery.com>
Date: Thu, 2 Oct 2014 20:39:27 -0700
Subject: [PATCH] design: added selector interface

---
 modules/core/src/compiler/annotated_type.js   |  9 +++++++++
 .../core/src/compiler/annotation_extractor.js | 16 ++++++++++++++++
 modules/core/src/compiler/selector.js         | 19 +++++++++++++++++++
 modules/facade/src/collection.dart            |  3 +--
 modules/facade/src/collection.es6             |  2 ++
 5 files changed, 47 insertions(+), 2 deletions(-)
 create mode 100644 modules/core/src/compiler/annotated_type.js
 create mode 100644 modules/core/src/compiler/annotation_extractor.js
 create mode 100644 modules/core/src/compiler/selector.js

diff --git a/modules/core/src/compiler/annotated_type.js b/modules/core/src/compiler/annotated_type.js
new file mode 100644
index 0000000000..527c8d498b
--- /dev/null
+++ b/modules/core/src/compiler/annotated_type.js
@@ -0,0 +1,9 @@
+import {Type, FIELD} from 'facade/lang';
+import {Directive} from '../annotations/directive'
+
+export class AnnotatedType {
+  constructor(annotation:Directive, type:Type) {
+    this.annotation = annotation;
+    this.type = type;
+  }
+}
diff --git a/modules/core/src/compiler/annotation_extractor.js b/modules/core/src/compiler/annotation_extractor.js
new file mode 100644
index 0000000000..98ad3633a5
--- /dev/null
+++ b/modules/core/src/compiler/annotation_extractor.js
@@ -0,0 +1,16 @@
+import {Type} from 'facade/lang';
+import {Directive} from '../annotations/directive'
+
+/**
+ * Interface representing a way of extracting [Directive] annotations from
+ * [Type]. This interface has three native implementations:
+ *
+ * 1) JavaScript native implementation
+ * 2) Dart reflective implementation
+ * 3) Dart transformer generated implementation
+ */
+export class AnnotationsExtractor {
+  extract(type:Type):Directive {
+    return null;
+  }
+}
diff --git a/modules/core/src/compiler/selector.js b/modules/core/src/compiler/selector.js
new file mode 100644
index 0000000000..4aee0862b3
--- /dev/null
+++ b/modules/core/src/compiler/selector.js
@@ -0,0 +1,19 @@
+import {Set} from 'facade/lang';
+//import {AnnotatedType} from './annotated_type';
+
+export class Selector {
+  constructor(directives:Set<AnnotatedType>) {
+    this.directives = directives;
+  }
+
+  /**
+   * When presented with an element description it will return the current set of
+   * directives which are present on the element.
+   *
+   * @param elementName Name of the element
+   * @param attributes Attributes on the Element.
+   */
+  visitElement(elementName:String, attributes:Map<string, string>):List<AnnotatedType> {
+    return null;
+  }
+}
diff --git a/modules/facade/src/collection.dart b/modules/facade/src/collection.dart
index add05568e3..f9d7fccf5b 100644
--- a/modules/facade/src/collection.dart
+++ b/modules/facade/src/collection.dart
@@ -1,8 +1,7 @@
 library facade.collection;
 
 import 'dart:collection' show HashMap;
-export 'dart:collection' show Map;
-export 'dart:core' show List;
+export 'dart:core' show Map, List, Set;
 
 class MapWrapper {
   static HashMap create() => new HashMap();
diff --git a/modules/facade/src/collection.es6 b/modules/facade/src/collection.es6
index a8e53a69d0..f2fe82b0fc 100644
--- a/modules/facade/src/collection.es6
+++ b/modules/facade/src/collection.es6
@@ -1,5 +1,7 @@
 export var List = window.Array;
 export var Map = window.Map;
+export var Set = window.Set;
+
 export class MapWrapper {
   static create():HashMap { return new HashMap(); }
   static get(m, k) { return m[k]; }