ko4j registers implementation of Transfer and WSTransfer based on XHR and WebSocket from a browser. The Java implementations of these interfaces has been moved to ko-ws-tyrus module. JavaScript arrays passed as parameters to Java callback methods need to be wrapped.
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43 package org.netbeans.html.wstyrus;
45 import java.io.IOException;
46 import java.io.InputStream;
47 import java.io.InputStreamReader;
48 import java.io.OutputStream;
49 import java.io.PushbackInputStream;
50 import java.io.Reader;
51 import java.net.HttpURLConnection;
52 import java.net.MalformedURLException;
54 import java.net.URLConnection;
55 import java.util.Iterator;
56 import java.util.concurrent.Executor;
57 import java.util.concurrent.Executors;
58 import java.util.concurrent.ThreadFactory;
59 import java.util.logging.Level;
60 import java.util.logging.Logger;
61 import net.java.html.js.JavaScriptBody;
62 import org.apidesign.html.json.spi.JSONCall;
63 import org.json.JSONArray;
64 import org.json.JSONException;
65 import org.json.JSONObject;
66 import org.json.JSONTokener;
68 /** This is an implementation package - just
69 * include its JAR on classpath and use official {@link Context} API
70 * to access the functionality.
72 * @author Jaroslav Tulach <jtulach@netbeans.org>
74 final class LoadJSON implements Runnable {
75 private static final Logger LOG = Logger.getLogger(LoadJSON.class.getName());
76 private static final Executor REQ = Executors.newCachedThreadPool(new ThreadFactory() {
78 public Thread newThread(Runnable runnable) {
79 Thread thread = Executors.defaultThreadFactory().newThread(runnable);
80 thread.setDaemon(true);
85 private final JSONCall call;
86 private final URL base;
89 private LoadJSON(JSONCall call) {
94 public static void loadJSON(JSONCall call) {
95 assert !"WebSocket".equals(call.getMethod());
96 REQ.execute(new LoadJSON((call)));
102 Throwable error = null;
105 if (call.isJSONP()) {
106 url = call.composeURL("dummy");
108 url = call.composeURL(null);
111 final URL u = new URL(base, url.replace(" ", "%20"));
112 URLConnection conn = u.openConnection();
113 if (conn instanceof HttpURLConnection) {
114 HttpURLConnection huc = (HttpURLConnection) conn;
115 if (call.getMethod() != null) {
116 huc.setRequestMethod(call.getMethod());
118 if (call.isDoOutput()) {
119 huc.setDoOutput(true);
120 final OutputStream os = huc.getOutputStream();
125 final PushbackInputStream is = new PushbackInputStream(
126 conn.getInputStream(), 1
128 boolean array = false;
129 boolean string = false;
130 if (call.isJSONP()) {
153 if (!array && ch != '{') {
160 throw new JSONException("");
162 Reader r = new InputStreamReader(is, "UTF-8");
164 JSONTokener tok = new JSONTokener(r);
166 obj = array ? new JSONArray(tok) : new JSONObject(tok);
167 json = convertToArray(obj);
168 } catch (JSONException ex) {
169 Reader r = new InputStreamReader(is, "UTF-8");
170 StringBuilder sb = new StringBuilder();
178 json = sb.toString();
180 } catch (IOException ex) {
184 call.notifyError(error);
186 call.notifySuccess(json);
191 static Object convertToArray(Object o) throws JSONException {
192 if (o instanceof JSONArray) {
193 JSONArray ja = (JSONArray)o;
194 Object[] arr = new Object[ja.length()];
195 for (int i = 0; i < arr.length; i++) {
196 arr[i] = convertToArray(ja.get(i));
199 } else if (o instanceof JSONObject) {
200 JSONObject obj = (JSONObject)o;
201 Iterator it = obj.keys();
202 while (it.hasNext()) {
203 String key = (String)it.next();
204 obj.put(key, convertToArray(obj.get(key)));
212 public static void extractJSON(Object jsonObject, String[] props, Object[] values) {
213 if (jsonObject instanceof JSONObject) {
214 JSONObject obj = (JSONObject)jsonObject;
215 for (int i = 0; i < props.length; i++) {
217 values[i] = obj.has(props[i]) ? obj.get(props[i]) : null;
218 } catch (JSONException ex) {
219 LoadJSON.LOG.log(Level.SEVERE, "Can't read " + props[i] + " from " + jsonObject, ex);
224 for (int i = 0; i < props.length; i++) {
225 values[i] = getProperty(jsonObject, props[i]);
229 @JavaScriptBody(args = {"object", "property"},
231 = "if (property === null) return object;\n"
232 + "if (object === null) return null;\n"
233 + "var p = object[property]; return p ? p : null;"
235 private static Object getProperty(Object object, String property) {
239 public static Object parse(InputStream is) throws IOException {
241 InputStreamReader r = new InputStreamReader(is, "UTF-8");
242 JSONTokener t = new JSONTokener(r);
243 return new JSONObject(t);
244 } catch (JSONException ex) {
245 throw new IOException(ex);