Add resource system for doric,start with android

doric-js/src/util/resource.ts

@@ -0,0 +1,57 @@
+import { Modeling } from "./types";
+
+export abstract class Resource implements Modeling {
+    type: string;
+    identifier: string;
+    constructor(type: string, identifier: string) {
+        this.type = type;
+        this.identifier = identifier;
+    }
+    toModel() {
+        return {
+            type: this.type,
+            identifier: this.identifier,
+        }
+    }
+}
+
+export class FileResource extends Resource {
+    constructor(path: string) {
+        super("file", path);
+    }
+}
+
+export class RemoteResource extends Resource {
+    constructor(url: string) {
+        super("remote", url)
+    }
+}
+
+/**
+ * This is for android platform
+ */
+export class DrawableResource extends Resource {
+    constructor(url: string) {
+        super("drawable", url)
+    }
+}
+export class RawResource extends Resource {
+    constructor(url: string) {
+        super("raw", url)
+    }
+}
+
+export class AssetResource extends Resource {
+    constructor(path: string) {
+        super("assets", path)
+    }
+}
+
+/**
+ * This is for iOS platform
+ */
+export class MainBundleResource extends Resource {
+    constructor(path: string) {
+        super("mainBundle", path)
+    }
+}

doric-js/src/widget/image.ts

@@ -17,6 +17,7 @@ import { View, Property } from "../ui/view"
 import { layoutConfig } from "../util/layoutconfig"
 import { Color } from "../util/color"
 import { BridgeContext } from "../runtime/global"
+import { Resource } from "../util/resource"
 
 export enum ScaleType {
     ScaleToFill = 0,
@@ -25,9 +26,14 @@ export enum ScaleType {
 }
 
 export class Image extends View {
+    /** 
+     * This could be loaded by customized resource loader
+    */
+    @Property
+    image?: Resource
+
     @Property
     imageUrl?: string
-
     /** 
      * Read image from local file system.
     */