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 java.io.IOException;
21 import java.io.InputStreamReader;
22 import java.io.PushbackInputStream;
23 import java.io.Reader;
24 import java.net.MalformedURLException;
26 import java.util.Iterator;
27 import java.util.concurrent.Executor;
28 import java.util.concurrent.Executors;
29 import java.util.logging.Level;
30 import java.util.logging.Logger;
31 import javafx.application.Platform;
32 import javafx.scene.web.WebEngine;
33 import netscape.javascript.JSObject;
34 import org.apidesign.bck2brwsr.core.JavaScriptBody;
35 import org.json.JSONArray;
36 import org.json.JSONException;
37 import org.json.JSONObject;
38 import org.json.JSONTokener;
42 * @author Jaroslav Tulach <jtulach@netbeans.org>
44 public final class ConvertTypes {
45 private static final Logger LOG = Logger.getLogger(ConvertTypes.class.getName());
49 public static String toString(Object object, String property) {
50 Object ret = getProperty(object, property);
51 return ret == null ? null : ret.toString();
54 public static double toDouble(Object object, String property) {
55 Object ret = getProperty(object, property);
56 return ret instanceof Number ? ((Number)ret).doubleValue() : Double.NaN;
59 public static int toInt(Object object, String property) {
60 Object ret = getProperty(object, property);
61 return ret instanceof Number ? ((Number)ret).intValue() : Integer.MIN_VALUE;
64 public static <T> T toModel(Class<T> modelClass, Object object, String property) {
65 Object ret = getProperty(object, property);
66 if (ret instanceof JSObject) {
67 Object real = ((JSObject)ret).getMember("koModel");
72 if (ret == null || modelClass.isInstance(ret)) {
73 return modelClass.cast(ret);
75 throw new IllegalStateException("Value " + ret + " is not of type " + modelClass);
78 public static String toJSON(Object value) {
82 if (value instanceof String) {
85 replace("\"", "\\\"").
91 return value.toString();
94 @JavaScriptBody(args = { "object", "property" },
95 body = "if (property === null) return object;\n"
96 + "var p = object[property]; return p ? p : null;"
98 private static Object getProperty(Object object, String property) {
99 if (property == null) {
102 if (object instanceof JSObject) {
103 JSObject jo = (JSObject)object;
104 return jo.getMember(property);
110 private static String findBaseURL() {
111 WebEngine eng = (WebEngine) System.getProperties().get("webEngine");
112 return (String)eng.executeScript(
114 + "if (!!window && !!window.location && !!window.location.href)\n"
115 + " h = window.location.href;\n"
122 public static String createJSONP(Object[] jsonResult, Runnable whenDone) {
123 return "json" + Integer.toHexString(whenDone.hashCode());
126 public static void loadJSON(
127 String url, Object[] jsonResult, Runnable whenDone, String jsonp
129 REQ.execute(new LoadJSON(url, jsonResult, whenDone, jsonp));
132 private static final Executor REQ = Executors.newCachedThreadPool();
133 private static final class LoadJSON implements Runnable {
135 private final String url;
136 private final Object[] jsonResult;
137 private final Runnable whenDone;
138 private final String jsonp;
139 private final URL base;
141 LoadJSON(String url, Object[] jsonResult, Runnable whenDone, String jsonp) {
143 this.jsonResult = jsonResult;
144 this.whenDone = whenDone;
148 b = new URL(findBaseURL());
149 } catch (MalformedURLException ex) {
150 LOG.log(Level.SEVERE, "Can't find base url for " + url, ex);
158 if (Platform.isFxApplicationThread()) {
163 URL u = new URL(base, url.replace(" ", "%20"));
164 PushbackInputStream is = new PushbackInputStream(u.openStream(), 1);
165 boolean array = false;
187 Reader r = new InputStreamReader(is, "UTF-8");
189 JSONTokener tok = new JSONTokener(r);
190 Object obj = array ? new JSONArray(tok) : new JSONObject(tok);
191 jsonResult[0] = convertToArray(obj);
192 } catch (JSONException | IOException ex) {
194 LOG.log(Level.WARNING, "Cannot connect to " + url, ex);
196 Platform.runLater(this);
200 private static Object convertToArray(Object o) throws JSONException {
201 if (o instanceof JSONArray) {
202 JSONArray ja = (JSONArray)o;
203 Object[] arr = new Object[ja.length()];
204 for (int i = 0; i < arr.length; i++) {
205 arr[i] = convertToArray(ja.get(i));
208 } else if (o instanceof JSONObject) {
209 JSONObject obj = (JSONObject)o;
210 Iterator it = obj.keys();
211 while (it.hasNext()) {
212 String key = (String)it.next();
213 obj.put(key, convertToArray(obj.get(key)));
222 @JavaScriptBody(args = { "url", "jsonp" }, body =
223 "var scrpt = window.document.createElement('script');\n "
224 + "scrpt.setAttribute('src', url);\n "
225 + "scrpt.setAttribute('id', jsonp);\n "
226 + "scrpt.setAttribute('type', 'text/javascript');\n "
227 + "var body = document.getElementsByTagName('body')[0];\n "
228 + "body.appendChild(scrpt);\n"
230 private static void loadJSONP(String url, String jsonp) {
234 public static void extractJSON(Object jsonObject, String[] props, Object[] values) {
235 if (jsonObject instanceof JSONObject) {
236 JSONObject obj = (JSONObject)jsonObject;
237 for (int i = 0; i < props.length; i++) {
239 values[i] = obj.has(props[i]) ? obj.get(props[i]) : null;
240 } catch (JSONException ex) {
241 LOG.log(Level.SEVERE, "Can't read " + props[i] + " from " + jsonObject, ex);