Source Code Cross Referenced for JsonStore.java in  » Ajax » gwtext-2.01 » com » gwtext » client » data » Java Source Code / Java DocumentationJava Source Code and Java Documentation

01:        /*
02:         * GWT-Ext Widget Library
03:         * Copyright(c) 2007-2008, GWT-Ext.
04:         * licensing@gwt-ext.com
05:         * 
06:         * http://www.gwt-ext.com/license
07:         */
08:
09:        package com.gwtext.client.data;
10:
11:        import com.google.gwt.core.client.JavaScriptObject;
12:        import com.gwtext.client.util.JavaScriptObjectHelper;
13:
14:        /**
15:         * Small helper class to make creating Stores for JSON data easier.
16:         * <pre>
17:         *  <code>
18:         *  JsonStore store = new JsonStore("get-images.php", "images",new RecordDef(new FieldDef[]{
19:         *          new StringFieldDef("name"),
20:         *          new StringFieldDef("url"),
21:         *          new FloatFieldDef("size"),
22:         *          new DateFieldDef("lastmod")}));
23:         *  </code>
24:         * </pre>
25:         * <p/>
26:         * This would consume a returned object of the form:
27:         *
28:         * <pre>
29:         * <code>
30:         * {
31:         *   images: [
32:         *       {name: &lt;em&gt;'Image one'&lt;/em&gt;, url:&lt;em&gt;'/GetImage.php?id=1'&lt;/em&gt;, size:46.5, lastmod: &lt;b&gt;new&lt;/b&gt; Date(2007, 10, 29)},
33:         *       {name: &lt;em&gt;'Image Two'&lt;/em&gt;, url:&lt;em&gt;'/GetImage.php?id=2'&lt;/em&gt;, size:43.2, lastmod: &lt;b&gt;new&lt;/b&gt; Date(2007, 10, 30)}
34:         *   ]
35:         * }
36:         * </code>
37:         * </pre>
38:         */
39:        public class JsonStore extends Store {
40:
41:            /**
42:             * Create a new JsonStore.
43:             *
44:             * @param url    the URL that returns the Json data
45:             * @param root   name of the property which contains the Array of row objects
46:             * @param fields the name of the fields
47:             */
48:            public JsonStore(String url, String root, String[] fields) {
49:                JavaScriptObject config = JavaScriptObjectHelper.createObject();
50:                JavaScriptObjectHelper.setAttribute(config, "url", url);
51:                JavaScriptObjectHelper.setAttribute(config, "root", root);
52:                JavaScriptObjectHelper.setAttribute(config, "fields", fields);
53:                jsObj = create(config);
54:            }
55:
56:            /**
57:             * Create a new JsonStore.
58:             *
59:             * @param url       the URL that returns the Json data
60:             * @param root      name of the property which contains the Array of row objects
61:             * @param recordDef the record def
62:             */
63:            public JsonStore(String url, String root, RecordDef recordDef) {
64:                JavaScriptObject config = JavaScriptObjectHelper.createObject();
65:                JavaScriptObjectHelper.setAttribute(config, "url", url);
66:                JavaScriptObjectHelper.setAttribute(config, "root", root);
67:                JavaScriptObjectHelper.setAttribute(config, "recordType",
68:                        recordDef.getJsObj());
69:                jsObj = create(config);
70:            }
71:
72:            native JavaScriptObject create(JavaScriptObject config) /*-{
73:                   return new $wnd.Ext.data.JsonStore(config);
74:               }-*/;
75:        }