org.netbeans.html.wstyrus.LoadJSON Maven / Gradle / Ivy
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package org.netbeans.html.wstyrus;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PushbackInputStream;
import java.io.Reader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Iterator;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;
import java.util.logging.Level;
import java.util.logging.Logger;
import net.java.html.js.JavaScriptBody;
import org.apidesign.html.json.spi.JSONCall;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONTokener;
/** This is an implementation package - just
* include its JAR on classpath and use official {@link Context} API
* to access the functionality.
*
* @author Jaroslav Tulach
*/
final class LoadJSON implements Runnable {
private static final Logger LOG = Logger.getLogger(LoadJSON.class.getName());
private static final Executor REQ = Executors.newCachedThreadPool(new ThreadFactory() {
@Override
public Thread newThread(Runnable runnable) {
Thread thread = Executors.defaultThreadFactory().newThread(runnable);
thread.setDaemon(true);
return thread;
}
});
private final JSONCall call;
private final URL base;
private LoadJSON(JSONCall call) {
this.call = call;
this.base = null;
}
public static void loadJSON(JSONCall call) {
assert !"WebSocket".equals(call.getMethod());
REQ.execute(new LoadJSON((call)));
}
@Override
public void run() {
final String url;
Throwable error = null;
Object json = null;
if (call.isJSONP()) {
url = call.composeURL("dummy");
} else {
url = call.composeURL(null);
}
try {
final URL u = new URL(base, url.replace(" ", "%20"));
URLConnection conn = u.openConnection();
if (conn instanceof HttpURLConnection) {
HttpURLConnection huc = (HttpURLConnection) conn;
if (call.getMethod() != null) {
huc.setRequestMethod(call.getMethod());
}
if (call.isDoOutput()) {
huc.setDoOutput(true);
final OutputStream os = huc.getOutputStream();
call.writeData(os);
os.flush();
}
}
final PushbackInputStream is = new PushbackInputStream(
conn.getInputStream(), 1
);
boolean array = false;
boolean string = false;
if (call.isJSONP()) {
for (;;) {
int ch = is.read();
if (ch == -1) {
break;
}
if (ch == '[') {
is.unread(ch);
array = true;
break;
}
if (ch == '{') {
is.unread(ch);
break;
}
}
} else {
int ch = is.read();
if (ch == -1) {
string = true;
} else {
array = ch == '[';
is.unread(ch);
if (!array && ch != '{') {
string = true;
}
}
}
try {
if (string) {
throw new JSONException("");
}
Reader r = new InputStreamReader(is, "UTF-8");
JSONTokener tok = new JSONTokener(r);
Object obj;
obj = array ? new JSONArray(tok) : new JSONObject(tok);
json = convertToArray(obj);
} catch (JSONException ex) {
Reader r = new InputStreamReader(is, "UTF-8");
StringBuilder sb = new StringBuilder();
for (;;) {
int ch = r.read();
if (ch == -1) {
break;
}
sb.append((char)ch);
}
json = sb.toString();
}
} catch (IOException ex) {
error = ex;
} finally {
if (error != null) {
call.notifyError(error);
} else {
call.notifySuccess(json);
}
}
}
static Object convertToArray(Object o) throws JSONException {
if (o instanceof JSONArray) {
JSONArray ja = (JSONArray)o;
Object[] arr = new Object[ja.length()];
for (int i = 0; i < arr.length; i++) {
arr[i] = convertToArray(ja.get(i));
}
return arr;
} else if (o instanceof JSONObject) {
JSONObject obj = (JSONObject)o;
Iterator it = obj.keys();
while (it.hasNext()) {
String key = (String)it.next();
obj.put(key, convertToArray(obj.get(key)));
}
return obj;
} else {
return o;
}
}
public static void extractJSON(Object jsonObject, String[] props, Object[] values) {
if (jsonObject instanceof JSONObject) {
JSONObject obj = (JSONObject)jsonObject;
for (int i = 0; i < props.length; i++) {
try {
values[i] = obj.has(props[i]) ? obj.get(props[i]) : null;
} catch (JSONException ex) {
LoadJSON.LOG.log(Level.SEVERE, "Can't read " + props[i] + " from " + jsonObject, ex);
}
}
return;
}
for (int i = 0; i < props.length; i++) {
values[i] = getProperty(jsonObject, props[i]);
}
}
@JavaScriptBody(args = {"object", "property"},
body
= "if (property === null) return object;\n"
+ "if (object === null) return null;\n"
+ "var p = object[property]; return p ? p : null;"
)
private static Object getProperty(Object object, String property) {
return null;
}
public static Object parse(InputStream is) throws IOException {
try {
InputStreamReader r = new InputStreamReader(is, "UTF-8");
JSONTokener t = new JSONTokener(r);
return new JSONObject(t);
} catch (JSONException ex) {
throw new IOException(ex);
}
}
}
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