| /* |
| * Copyright 2010 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package com.google.gwt.requestfactory.shared; |
| |
| import java.util.Set; |
| |
| /** |
| * Callback object for {@link Request#fire(Receiver)} and |
| * {@link RequestContext#fire(Receiver)}. |
| * |
| * @param <V> value type |
| */ |
| public abstract class Receiver<V> { |
| /** |
| * Receives general failure notifications. The default implementation looks at |
| * {@link ServerFailure#isFatal()}, and throws a runtime exception with the |
| * failure object's error message if it is true. |
| * |
| * @param error a {@link ServerFailure} instance |
| */ |
| public void onFailure(ServerFailure error) { |
| if (error.isFatal()) { |
| throw new RuntimeException(error.getMessage()); |
| } |
| } |
| |
| /** |
| * Called when a Request has been successfully executed on the server. |
| * |
| * @param response a response of type V |
| */ |
| public abstract void onSuccess(V response); |
| |
| /** |
| * Called if an object sent to the server could not be validated. The default |
| * implementation calls {@link #onFailure(ServerFailure)} if <code>errors |
| * </code> is not empty. |
| * |
| * @param errors a Set of {@link Violation} instances |
| */ |
| public void onViolation(Set<Violation> errors) { |
| if (!errors.isEmpty()) { |
| onFailure(new ServerFailure( |
| "The call failed on the server due to a ConstraintViolation")); |
| } |
| } |
| } |