| /* |
| * 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.ui.client; |
| |
| import com.google.gwt.requestfactory.shared.EntityProxy; |
| import com.google.gwt.view.client.ProvidesKey; |
| |
| /** |
| * An {@link EntityProxy}-aware key provider, handy for use with |
| * {@link com.google.gwt.view.client.SelectionModel} and various |
| * cell widgets. |
| * |
| * @see com.google.gwt.user.cellview.client.CellBrowser |
| * @see com.google.gwt.user.cellview.client.CellList |
| * @see com.google.gwt.user.cellview.client.CellTable |
| * |
| * @param <P> the proxy type |
| */ |
| public class EntityProxyKeyProvider<P extends EntityProxy> implements |
| ProvidesKey<P> { |
| /** |
| * Returns the key Object for the given item. |
| * |
| * @param item an item of type P |
| */ |
| public Object getKey(P item) { |
| return item == null ? null : item.stableId(); |
| } |
| } |