2 * Back 2 Browser Bytecode Translator
3 * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. Look for COPYING file in the top folder.
16 * If not, see http://opensource.org/licenses/GPL-2.0.
18 package org.apidesign.bck2brwsr.htmlpage;
20 import org.apidesign.bck2brwsr.core.JavaScriptBody;
24 * @author Jaroslav Tulach <jtulach@netbeans.org>
26 public final class ConvertTypes {
30 public static String toString(Object object, String property) {
31 Object ret = getProperty(object, property);
32 return ret == null ? null : ret.toString();
35 public static double toDouble(Object object, String property) {
36 Object ret = getProperty(object, property);
37 return ret instanceof Number ? ((Number)ret).doubleValue() : Double.NaN;
40 public static int toInt(Object object, String property) {
41 Object ret = getProperty(object, property);
42 return ret instanceof Number ? ((Number)ret).intValue() : Integer.MIN_VALUE;
45 public static <T> T toModel(Class<T> modelClass, Object object, String property) {
46 Object ret = getProperty(object, property);
47 if (ret == null || modelClass.isInstance(ret)) {
48 return modelClass.cast(ret);
50 throw new IllegalStateException("Value " + ret + " is not of type " + modelClass);
53 public static String toJSON(Object value) {
57 if (value instanceof String) {
60 replace("\"", "\\\"").
66 return value.toString();
69 @JavaScriptBody(args = { "object", "property" },
70 body = "if (property === null) return object;\n"
71 + "var p = object[property]; return p ? p : null;"
73 private static Object getProperty(Object object, String property) {
77 @JavaScriptBody(args = { "url", "arr", "callback" }, body = ""
78 + "var request = new XMLHttpRequest();\n"
79 + "request.open('GET', url, true);\n"
80 + "request.setRequestHeader('Content-Type', 'application/json; charset=utf-8');\n"
81 + "request.onreadystatechange = function() {\n"
82 + " if (this.readyState!==4) return;\n"
84 + " arr[0] = eval('(' + this.response + ')');\n"
85 + " } catch (error) {;\n"
86 + " throw 'Cannot parse' + error + ':' + this.response;\n"
88 + " callback.run__V();\n"
92 public static native void loadJSON(
93 String url, Object[] jsonResult, Runnable whenDone
96 public static void extractJSON(Object jsonObject, String[] props, Object[] values) {
97 for (int i = 0; i < props.length; i++) {
98 values[i] = getProperty(jsonObject, props[i]);