예제 #1
0
  /**
   * Calls a particular callback function. The function must previously have been checked using
   * checkCallback().
   *
   * @param sCallback Name of callback
   * @throws OmException If the callback throws an exception or there was an error calling it
   */
  public void callback(String sCallback) throws OmException {
    if (!sCheckedCallbacks.contains(sCallback))
      throw new OmDeveloperException(
          "Error running callback " + sCallback + "(): checkCallback was not called");

    try {
      Method m = getClass().getMethod(sCallback, new Class[0]);
      m.invoke(this, new Object[0]);
    } catch (InvocationTargetException e) {
      if (e.getCause() instanceof OmException) throw (OmException) e.getCause();
      else throw new OmException("Exception in callback " + sCallback + "()", e.getCause());
    } catch (Exception e) {
      throw new OmUnexpectedException(e);
    }
  }
예제 #2
0
  /**
   * Checks that a callback method is present and correctly defined.
   *
   * <p>Having checked it, you can call it using callback().
   *
   * @param sCallback Name of callback method
   * @throws OmDeveloperException If the method doesn't exist or is defined incorrectly
   */
  public void checkCallback(String sCallback) throws OmDeveloperException {
    try {
      Method m = getClass().getMethod(sCallback, new Class[0]);

      if (m.getReturnType() != void.class)
        throw new OmDeveloperException("Callback method " + sCallback + "() must return void");
      if (!Modifier.isPublic(m.getModifiers()))
        throw new OmDeveloperException("Callback method " + sCallback + "() must be public");
      if (Modifier.isStatic(m.getModifiers()))
        throw new OmDeveloperException("Callback method " + sCallback + "() may not be static");
      if (Modifier.isAbstract(m.getModifiers()))
        throw new OmDeveloperException("Callback method " + sCallback + "() may not be abstract");

      sCheckedCallbacks.add(sCallback);
    } catch (NoSuchMethodException e) {
      throw new OmDeveloperException("Callback method " + sCallback + "() does not exist");
    }
  }