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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;
53 import java.net.URLConnection;
54 import java.util.Iterator;
55 import java.util.concurrent.Executor;
56 import java.util.concurrent.Executors;
57 import java.util.concurrent.ThreadFactory;
58 import java.util.logging.Level;
59 import java.util.logging.Logger;
60 import net.java.html.js.JavaScriptBody;
61 import org.apidesign.html.json.spi.JSONCall;
62 import org.json.JSONArray;
63 import org.json.JSONException;
64 import org.json.JSONObject;
65 import org.json.JSONTokener;
67 /** This is an implementation package - just
68 * include its JAR on classpath and use official {@link Context} API
69 * to access the functionality.
71 * @author Jaroslav Tulach <jtulach@netbeans.org>
73 final class LoadJSON implements Runnable {
74 private static final Logger LOG = Logger.getLogger(LoadJSON.class.getName());
75 private static final Executor REQ = Executors.newCachedThreadPool(new ThreadFactory() {
77 public Thread newThread(Runnable runnable) {
78 Thread thread = Executors.defaultThreadFactory().newThread(runnable);
79 thread.setDaemon(true);
84 private final JSONCall call;
85 private final URL base;
88 private LoadJSON(JSONCall call) {
93 public static void loadJSON(JSONCall call) {
94 assert !"WebSocket".equals(call.getMethod());
95 REQ.execute(new LoadJSON((call)));
101 Throwable error = null;
104 if (call.isJSONP()) {
105 url = call.composeURL("dummy");
107 url = call.composeURL(null);
110 final URL u = new URL(base, url.replace(" ", "%20"));
111 URLConnection conn = u.openConnection();
112 if (call.isDoOutput()) {
113 conn.setDoOutput(true);
115 if (call.getMethod() != null && conn instanceof HttpURLConnection) {
116 ((HttpURLConnection) conn).setRequestMethod(call.getMethod());
118 if (call.isDoOutput()) {
119 final OutputStream os = conn.getOutputStream();
123 final PushbackInputStream is = new PushbackInputStream(
124 conn.getInputStream(), 1
126 boolean[] arrayOrString = { false, false };
127 detectJSONType(call.isJSONP(), is, arrayOrString);
129 if (arrayOrString[1]) {
130 throw new JSONException("");
132 JSONTokener tok = createTokener(is);
134 obj = arrayOrString[0] ? new JSONArray(tok) : new JSONObject(tok);
135 json = convertToArray(obj);
136 } catch (JSONException ex) {
137 Reader r = new InputStreamReader(is, "UTF-8");
138 StringBuilder sb = new StringBuilder();
146 json = sb.toString();
148 } catch (IOException ex) {
152 call.notifyError(error);
154 call.notifySuccess(json);
159 private static void detectJSONType(boolean skipAnything, final PushbackInputStream is, boolean[] arrayOrString) throws IOException {
163 arrayOrString[1] = true;
166 if (Character.isWhitespace(ch)) {
172 arrayOrString[0] = true;
181 arrayOrString[1] = true;
187 private static JSONTokener createTokener(InputStream is) throws IOException {
188 Reader r = new InputStreamReader(is, "UTF-8");
190 return new JSONTokener(r);
191 } catch (LinkageError ex) {
192 // phones may carry outdated version of JSONTokener
193 StringBuilder sb = new StringBuilder();
201 return new JSONTokener(sb.toString());
205 static Object convertToArray(Object o) throws JSONException {
206 if (o instanceof JSONArray) {
207 JSONArray ja = (JSONArray)o;
208 Object[] arr = new Object[ja.length()];
209 for (int i = 0; i < arr.length; i++) {
210 arr[i] = convertToArray(ja.get(i));
213 } else if (o instanceof JSONObject) {
214 JSONObject obj = (JSONObject)o;
215 Iterator it = obj.keys();
216 while (it.hasNext()) {
217 String key = (String)it.next();
218 obj.put(key, convertToArray(obj.get(key)));
221 } else if (o == JSONObject.NULL) {
228 public static void extractJSON(Object jsonObject, String[] props, Object[] values) {
229 if (jsonObject instanceof JSONObject) {
230 JSONObject obj = (JSONObject)jsonObject;
231 for (int i = 0; i < props.length; i++) {
232 Object val = obj.opt(props[i]);
233 if (val == JSONObject.NULL) {
240 for (int i = 0; i < props.length; i++) {
241 values[i] = getProperty(jsonObject, props[i]);
245 @JavaScriptBody(args = {"object", "property"},
247 = "if (property === null) return object;\n"
248 + "if (object === null) return null;\n"
249 + "var p = object[property]; return p ? p : null;"
251 private static Object getProperty(Object object, String property) {
255 public static Object parse(InputStream is) throws IOException {
257 PushbackInputStream push = new PushbackInputStream(is, 1);
258 boolean[] arrayOrString = { false, false };
259 detectJSONType(false, push, arrayOrString);
260 JSONTokener t = createTokener(push);
261 Object obj = arrayOrString[0] ? new JSONArray(t) : new JSONObject(t);
262 return convertToArray(obj);
263 } catch (JSONException ex) {
264 throw new IOException(ex);