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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.ArrayList;
55 import java.util.Iterator;
56 import java.util.List;
57 import java.util.concurrent.Executor;
58 import java.util.concurrent.Executors;
59 import java.util.concurrent.ThreadFactory;
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
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 (call.isDoOutput()) {
114 conn.setDoOutput(true);
116 if (call.getMethod() != null && conn instanceof HttpURLConnection) {
117 ((HttpURLConnection) conn).setRequestMethod(call.getMethod());
119 if (call.isDoOutput()) {
120 final OutputStream os = conn.getOutputStream();
124 final PushbackInputStream is = new PushbackInputStream(
125 conn.getInputStream(), 1
127 boolean[] arrayOrString = { false, false };
128 detectJSONType(call.isJSONP(), is, arrayOrString);
130 if (arrayOrString[1]) {
131 throw new JSONException("");
133 JSONTokener tok = createTokener(is);
135 obj = arrayOrString[0] ? new JSONArray(tok) : new JSONObject(tok);
136 json = convertToArray(obj);
137 } catch (JSONException ex) {
138 Reader r = new InputStreamReader(is, "UTF-8");
139 StringBuilder sb = new StringBuilder();
147 json = sb.toString();
149 } catch (IOException ex) {
153 call.notifyError(error);
155 call.notifySuccess(json);
160 private static void detectJSONType(boolean skipAnything, final PushbackInputStream is, boolean[] arrayOrString) throws IOException {
164 arrayOrString[1] = true;
167 if (Character.isWhitespace(ch)) {
173 arrayOrString[0] = true;
182 arrayOrString[1] = true;
188 private static JSONTokener createTokener(InputStream is) throws IOException {
189 Reader r = new InputStreamReader(is, "UTF-8");
191 return new JSONTokener(r);
192 } catch (LinkageError ex) {
193 // phones may carry outdated version of JSONTokener
194 StringBuilder sb = new StringBuilder();
202 return new JSONTokener(sb.toString());
206 static Object convertToArray(Object o) throws JSONException {
207 if (o instanceof JSONArray) {
208 JSONArray ja = (JSONArray)o;
209 Object[] arr = new Object[ja.length()];
210 for (int i = 0; i < arr.length; i++) {
211 arr[i] = convertToArray(ja.get(i));
214 } else if (o instanceof JSONObject) {
215 JSONObject obj = (JSONObject)o;
216 Iterator it = obj.keys();
217 List<Object> collect = new ArrayList<Object>();
218 while (it.hasNext()) {
219 String key = (String)it.next();
220 final Object val = obj.get(key);
221 final Object newVal = convertToArray(val);
227 int size = collect.size();
228 for (int i = 0; i < size; i += 2) {
229 obj.put((String) collect.get(i), collect.get(i + 1));
232 } else if (o == JSONObject.NULL) {
239 public static void extractJSON(Object jsonObject, String[] props, Object[] values) {
240 if (jsonObject instanceof JSONObject) {
241 JSONObject obj = (JSONObject)jsonObject;
242 for (int i = 0; i < props.length; i++) {
243 Object val = obj.opt(props[i]);
244 if (val == JSONObject.NULL) {
251 for (int i = 0; i < props.length; i++) {
252 values[i] = getProperty(jsonObject, props[i]);
256 @JavaScriptBody(args = {"object", "property"},
258 = "if (property === null) return object;\n"
259 + "if (object === null) return null;\n"
260 + "var p = object[property]; return p ? p : null;"
262 private static Object getProperty(Object object, String property) {
266 public static Object parse(InputStream is) throws IOException {
268 PushbackInputStream push = new PushbackInputStream(is, 1);
269 boolean[] arrayOrString = { false, false };
270 detectJSONType(false, push, arrayOrString);
271 JSONTokener t = createTokener(push);
272 Object obj = arrayOrString[0] ? new JSONArray(t) : new JSONObject(t);
273 return convertToArray(obj);
274 } catch (JSONException ex) {
275 throw new IOException(ex);