public Matrix createVector(BitVector selector) { int rows = selector != null ? selector.countOnBits() : frame.size(); Matrix m = new Matrix(rows, 1); for (int i = 0, j = 0; j < frame.size(); j++) { if (selector == null || selector.isOn(j)) { M rowValue = frame.object(j); try { Number numValue = (Number) numericField.get(rowValue); m.set(i, 0, numValue.doubleValue()); } catch (IllegalAccessException e) { e.printStackTrace(); throw new IllegalStateException( String.format( "Couldn't access field %s: %s", numericField.getName(), e.getMessage())); } i++; } } return m; }
/** 直接设置对象属性值, 无视private/protected修饰符, 不经过setter函数. */ public static void setFieldValue(final Object obj, final String fieldName, final Object value) { Field field = getAccessibleField(obj, fieldName); if (field == null) { throw new IllegalArgumentException( "Could not find field [" + fieldName + "] on target [" + obj + "]"); } try { field.set(obj, value); } catch (IllegalAccessException e) { logger.error("不可能抛出的异常:{}", e.getMessage()); } }
/** 直接读取对象属性值, 无视private/protected修饰符, 不经过getter函数. */ public static Object getFieldValue(final Object obj, final String fieldName) { Field field = getAccessibleField(obj, fieldName); if (field == null) { throw new IllegalArgumentException( "Could not find field [" + fieldName + "] on target [" + obj + "]"); } Object result = null; try { result = field.get(obj); } catch (IllegalAccessException e) { logger.error("不可能抛出的异常{}", e.getMessage()); } return result; }
public Matrix createVector() { int rows = frame.size(); Matrix m = new Matrix(rows, 1); for (int i = 0; i < rows; i++) { M rowValue = frame.object(i); try { Number numValue = (Number) numericField.get(rowValue); m.set(i, 0, numValue.doubleValue()); } catch (IllegalAccessException e) { e.printStackTrace(); throw new IllegalStateException( String.format("Couldn't access field %s: %s", numericField.getName(), e.getMessage())); } } return m; }
/** * Parses array from given JSONArray. Supports parsing of primitive types and {@link * com.vk.sdk.api.model.VKApiModel} instances. * * @param array JSONArray to parse * @param arrayClass type of array field in class. * @return object to set to array field in class * @throws org.json.JSONException if given array have incompatible type with given field. */ private static Object parseArrayViaReflection(JSONArray array, Class arrayClass) throws JSONException { Object result = Array.newInstance(arrayClass.getComponentType(), array.length()); Class<?> subType = arrayClass.getComponentType(); for (int i = 0; i < array.length(); i++) { try { Object item = array.opt(i); if (VKApiModel.class.isAssignableFrom(subType) && item instanceof JSONObject) { VKApiModel model = (VKApiModel) subType.newInstance(); item = model.parse((JSONObject) item); } Array.set(result, i, item); } catch (InstantiationException e) { throw new JSONException(e.getMessage()); } catch (IllegalAccessException e) { throw new JSONException(e.getMessage()); } catch (IllegalArgumentException e) { throw new JSONException(e.getMessage()); } } return result; }
/** * Processes the request coming to the servlet and grabs the attributes set by the servlet and * uses them to fire off pre-determined methods set in the setupActionMethods function of the * servlet. * * @param request the http request coming from the browser. * @param response the http response going to the browser. * @throws javax.servlet.ServletException * @throws java.io.IOException */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { if (!actionInitialized) { LogController.write(this, "This dispatcher servlet is not initialized properly!"); return; } if (actionTag == null) { LogController.write(this, "There is no action attribute tag name!"); return; } HttpSession httpSession = request.getSession(); UserSession userSession = (UserSession) httpSession.getAttribute("user_session"); if (userSession == null) { LogController.write(this, "User session is no longer available in this http session."); userSession = new UserSession(); // We always want a user session though... httpSession.setAttribute("user_session", userSession); } String action = (String) request.getAttribute(actionTag); try { if (action == null) { // There is no action attribute specified, check parameters. String external_action = (String) request.getParameter(actionTag); if (external_action != null) { Method method = externalActions.get(external_action); if (method != null) { LogController.write(this, "Performing external action: " + external_action); method.invoke(this, new Object[] {userSession, request, response}); } else { if (defaultExternalMethod != null) { LogController.write(this, "Performing default external action."); defaultExternalMethod.invoke(this, new Object[] {userSession, request, response}); } else { LogController.write(this, "Unable to perform default external action."); } } } else { if (defaultExternalMethod != null) { LogController.write(this, "Performing default external action."); defaultExternalMethod.invoke(this, new Object[] {userSession, request, response}); } else { LogController.write(this, "Unable to perform default external action."); } } } else { Method method = internalActions.get(action); if (method != null) { LogController.write(this, "Performing internal action: " + action); method.invoke(this, new Object[] {userSession, request, response}); } else { if (defaultInternalMethod != null) { LogController.write(this, "Performing default internal action."); defaultInternalMethod.invoke(this, new Object[] {userSession, request, response}); } else { LogController.write(this, "Unable to perform default internal action."); } } request.removeAttribute("application_action"); } } catch (IllegalAccessException accessEx) { LogController.write(this, "Exception while processing request: " + accessEx.getMessage()); } catch (InvocationTargetException invokeEx) { LogController.write(this, "Exception while processing request: " + invokeEx.toString()); invokeEx.printStackTrace(); } catch (Exception ex) { LogController.write(this, "Unknown exception: " + ex.toString()); } }
/** * Parses object with follow rules: * * <p>1. All fields should had a public access. 2. The name of the filed should be fully equal to * name of JSONObject key. 3. Supports parse of all Java primitives, all {@link String}, arrays of * primitive types, {@link String}s and {@link com.vk.sdk.api.model.VKApiModel}s, list * implementation line {@link VKList}, {@link com.vk.sdk.api.model.VKAttachments.VKAttachment} or * {@link com.vk.sdk.api.model.VKPhotoSizes}, {@link com.vk.sdk.api.model.VKApiModel}s. * * <p>4. Boolean fields defines by vk_int == 1 expression. * * @param object object to initialize * @param source data to read values * @param <T> type of result * @return initialized according with given data object * @throws org.json.JSONException if source object structure is invalid */ @SuppressWarnings({"rawtypes", "unchecked"}) public static <T> T parseViaReflection(T object, JSONObject source) throws JSONException { if (source.has("response")) { source = source.optJSONObject("response"); } if (source == null) { return object; } for (Field field : object.getClass().getFields()) { field.setAccessible(true); String fieldName = field.getName(); Class<?> fieldType = field.getType(); Object value = source.opt(fieldName); if (value == null) { continue; } try { if (fieldType.isPrimitive() && value instanceof Number) { Number number = (Number) value; if (fieldType.equals(int.class)) { field.setInt(object, number.intValue()); } else if (fieldType.equals(long.class)) { field.setLong(object, number.longValue()); } else if (fieldType.equals(float.class)) { field.setFloat(object, number.floatValue()); } else if (fieldType.equals(double.class)) { field.setDouble(object, number.doubleValue()); } else if (fieldType.equals(boolean.class)) { field.setBoolean(object, number.intValue() == 1); } else if (fieldType.equals(short.class)) { field.setShort(object, number.shortValue()); } else if (fieldType.equals(byte.class)) { field.setByte(object, number.byteValue()); } } else { Object result = field.get(object); if (value.getClass().equals(fieldType)) { result = value; } else if (fieldType.isArray() && value instanceof JSONArray) { result = parseArrayViaReflection((JSONArray) value, fieldType); } else if (VKPhotoSizes.class.isAssignableFrom(fieldType) && value instanceof JSONArray) { Constructor<?> constructor = fieldType.getConstructor(JSONArray.class); result = constructor.newInstance((JSONArray) value); } else if (VKAttachments.class.isAssignableFrom(fieldType) && value instanceof JSONArray) { Constructor<?> constructor = fieldType.getConstructor(JSONArray.class); result = constructor.newInstance((JSONArray) value); } else if (VKList.class.equals(fieldType)) { ParameterizedType genericTypes = (ParameterizedType) field.getGenericType(); Class<?> genericType = (Class<?>) genericTypes.getActualTypeArguments()[0]; if (VKApiModel.class.isAssignableFrom(genericType) && Parcelable.class.isAssignableFrom(genericType) && Identifiable.class.isAssignableFrom(genericType)) { if (value instanceof JSONArray) { result = new VKList((JSONArray) value, genericType); } else if (value instanceof JSONObject) { result = new VKList((JSONObject) value, genericType); } } } else if (VKApiModel.class.isAssignableFrom(fieldType) && value instanceof JSONObject) { result = ((VKApiModel) fieldType.newInstance()).parse((JSONObject) value); } field.set(object, result); } } catch (InstantiationException e) { throw new JSONException(e.getMessage()); } catch (IllegalAccessException e) { throw new JSONException(e.getMessage()); } catch (NoSuchMethodException e) { throw new JSONException(e.getMessage()); } catch (InvocationTargetException e) { throw new JSONException(e.getMessage()); } catch (NoSuchMethodError e) { // Примечание Виталия: // Вы не поверите, но у некоторых вендоров getFields() вызывает ВОТ ЭТО. // Иногда я всерьез задумываюсь, правильно ли я поступил, выбрав Android в качестве // платформы разработки. throw new JSONException(e.getMessage()); } } return object; }