| /* |
| * 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.web.bindery.requestfactory.shared.impl; |
| |
| import static com.google.web.bindery.requestfactory.shared.impl.BaseProxyCategory.requestContext; |
| import static com.google.web.bindery.requestfactory.shared.impl.Constants.STABLE_ID; |
| |
| import com.google.web.bindery.autobean.shared.AutoBean; |
| import com.google.web.bindery.autobean.shared.AutoBeanUtils; |
| import com.google.web.bindery.requestfactory.shared.EntityProxy; |
| |
| /** |
| * Contains static implementation of EntityProxy-specific methods. |
| */ |
| public class EntityProxyCategory { |
| |
| /** |
| * EntityProxies are equal if they are from the same RequestContext and their |
| * stableIds are equal. |
| */ |
| public static boolean equals(AutoBean<? extends EntityProxy> bean, Object o) { |
| if (!(o instanceof EntityProxy)) { |
| return false; |
| } |
| AutoBean<EntityProxy> other = AutoBeanUtils.getAutoBean((EntityProxy) o); |
| if (other == null) { |
| // Unexpected, could be an user-provided implementation? |
| return false; |
| } |
| |
| // Object comparison intentional. True if both null or both the same |
| return stableId(bean).equals(stableId(other)) |
| && nonDiffingRequestContext(bean) == nonDiffingRequestContext(other); |
| } |
| |
| /** |
| * Hashcode is always that of the stableId, since it's stable across time. |
| */ |
| public static int hashCode(AutoBean<? extends EntityProxy> bean) { |
| return stableId(bean).hashCode(); |
| } |
| |
| /** |
| * Effectively overrides {@link BaseProxyCategory#stableId(AutoBean)} to |
| * return a narrower bound. |
| */ |
| public static <T extends EntityProxy> SimpleEntityProxyId<T> stableId( |
| AutoBean<? extends T> bean) { |
| return bean.getTag(STABLE_ID); |
| } |
| |
| private static AbstractRequestContext nonDiffingRequestContext(AutoBean<?> bean) { |
| AbstractRequestContext context = requestContext(bean); |
| if (context != null && context.isDiffing()) { |
| context = null; |
| } |
| return context; |
| } |
| } |