com.google.web.bindery.requestfactory.shared.impl.EntityProxyCategory Maven / Gradle / Ivy
/*
* 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 bean, Object o) {
if (!(o instanceof EntityProxy)) {
return false;
}
AutoBean 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 bean) {
return stableId(bean).hashCode();
}
/**
* Effectively overrides {@link BaseProxyCategory#stableId(AutoBean)} to
* return a narrower bound.
*/
public static SimpleEntityProxyId stableId(
AutoBean 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;
}
}