How to use

JavaScriptException

in

com.google.gwt.core.client

 private void setHeaders(XMLHttpRequest xmlHttpRequest)
   throws RequestException {
  if (headers != null && headers.size() > 0) {
   for (Map.Entry<String, String> header : headers.entrySet()) {
    try {
     xmlHttpRequest.setRequestHeader(header.getKey(), header.getValue());
    } catch (JavaScriptException e) {
     throw new RequestException(e.getMessage());
    }
   }
  } else {
   xmlHttpRequest.setRequestHeader("Content-Type",
     "text/plain; charset=utf-8");
  }
 }
}

private void ensureInit() {
 if (message == null) {
  Object exception = getThrown();
  name = getExceptionName(exception);
  description = description + ": " + getExceptionDescription(exception);
  message = "(" + name + ") " + description;
 }
}

@Override
public String getMessage() {
 ensureInit();
 return message;
}

public static int getArraySize(JSONValue array) {
 if (array instanceof JSONArray) {
  return ((JSONArray) array).size();
 }
 if (array instanceof JSONObject) {
  return ((JSONObject) array).size();
 }
 throw new JavaScriptException("Not implemented");
}

private static native void reportToBrowser(Object e) /*-{
 $wnd.setTimeout(function () {
  throw e;
 }, 0);
}-*/;

 throw e;
} else {
 JavaScriptException materialized = new JavaScriptException(e.getName(),
   e.getDescription());
 materialized.setStackTrace(e.getStackTrace());
 throw materialized;

private void doExecute(Runnable r) {
 try {
  r.run();
 } catch (JavaScriptException jse) {
  if (jse.isThrownSet()) {
   LOG.severe("Caught JavaScriptException, wrapped error is: " + jse.getThrown());
  }
  ThrowableHandlers.handle(jse);
 } catch (Throwable t) {
  ThrowableHandlers.handle(t);
 }
}

private static String getExceptionName(Object e) {
 if (e == null) {
  return "null";
 } else if (e instanceof JavaScriptObject) {
  return getExceptionName0((JavaScriptObject) e);
 } else if (e instanceof String) {
  return "String";
 } else {
  return e.getClass().getName();
 }
}

private static String getExceptionDescription(Object e) {
 if (e instanceof JavaScriptObject) {
  return getExceptionDescription0((JavaScriptObject) e);
 } else {
  return e + "";
 }
}

static JavaScriptException convertJavaScriptObjectToException(JavaScriptObject e) {
 return new JavaScriptException(javaScriptExceptionName(e), javaScriptExceptionDescription(e));
}

private static native void reportToBrowser(Object e) /*-{
 $wnd.setTimeout(function () {
  throw e;
 }, 0);
}-*/;

private static String getExceptionName(Object e) {
 if (e == null) {
  return "null";
 } else if (e instanceof JavaScriptObject) {
  return getExceptionName0((JavaScriptObject) e);
 } else if (e instanceof String) {
  return "String";
 } else {
  return e.getClass().getName();
 }
}

private static String getExceptionDescription(Object e) {
 if (e instanceof JavaScriptObject) {
  return getExceptionDescription0((JavaScriptObject) e);
 } else {
  return e + "";
 }
}

 RequestPermissionException requestPermissionException = new RequestPermissionException(
   url);
 requestPermissionException.initCause(new RequestException(e.getMessage()));
 throw requestPermissionException;
 xmlHttpRequest.send(requestData);
} catch (JavaScriptException e) {
 throw new RequestException(e.getMessage());

private void ensureInit() {
 if (message == null) {
  Object exception = getThrown();
  name = getExceptionName(exception);
  description = description + ": " + getExceptionDescription(exception);
  message = "(" + name + ") " + description;
 }
}

  public OMSVGICCColor iccColor(String str) {
//        GWT.log("iccColor(" + str + ")");
    ICC.setLastIndex(0);
    MatchResult result = ICC.exec(str);
    if (result != null && result.getGroupCount() == 3) {
      String[] intArray = result.getGroup(2).split(COMMA);
      List<Integer> intList = new ArrayList<Integer>();
      for (int i = 0; i < intArray.length; i++) {
        if (intArray[i].length() > 0) {
          intList.add(Integer.parseInt(intArray[i]));
        }
      }
      return new OMSVGICCColor(result.getGroup(1), intList);
    }
    throw new JavaScriptException("Invalid icc-color spec: " + str);
  }

/**
 * Returns the original JavaScript message of the exception; may be
 * <code>null</code>.
 */
public String getDescription() {
 ensureInit();
 return description;
}

private static native void reportToBrowser(Object e) /*-{
 $wnd.setTimeout(function () {
  throw e;
 }, 0);
}-*/;

private static String getExceptionName(Object e) {
 if (e == null) {
  return "null";
 } else if (e instanceof JavaScriptObject) {
  return getExceptionName0((JavaScriptObject) e);
 } else if (e instanceof String) {
  return "String";
 } else {
  return e.getClass().getName();
 }
}

private static String getExceptionDescription(Object e) {
 if (e instanceof JavaScriptObject) {
  return getExceptionDescription0((JavaScriptObject) e);
 } else {
  return e + "";
 }
}