com.google.gwt.sample.expenses.client.place.FindAndEditProxy.java Source code

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Here is the source code for com.google.gwt.sample.expenses.client.place.FindAndEditProxy.java

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/*
 * 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.sample.expenses.client.place;

import com.google.gwt.event.shared.EventBus;
import com.google.gwt.place.shared.PlaceController;
import com.google.gwt.requestfactory.shared.EntityProxy;
import com.google.gwt.requestfactory.shared.EntityProxyId;
import com.google.gwt.requestfactory.shared.Receiver;
import com.google.gwt.requestfactory.shared.RequestFactory;
import com.google.gwt.user.client.ui.AcceptsOneWidget;

/**
 * Extends {@link AbstractProxyEditActivity} to work from a
 * {@link EntityProxyId}.
 * 
 * @param <P> the type of proxy to find and edit
 */
public abstract class FindAndEditProxy<P extends EntityProxy> extends AbstractProxyEditActivity<P> {

    private final RequestFactory factory;
    private final EntityProxyId<P> proxyId;
    private P proxy;

    public FindAndEditProxy(EntityProxyId<P> proxyId, RequestFactory factory, ProxyEditView<P, ?> view,
            PlaceController placeController) {
        super(view, placeController);
        this.proxyId = proxyId;
        this.factory = factory;
    }

    @Override
    public void start(final AcceptsOneWidget display, final EventBus eventBus) {
        factory.find(proxyId).fire(new Receiver<P>() {
            @Override
            public void onSuccess(P response) {
                proxy = response;
                FindAndEditProxy.super.start(display, eventBus);
            }
        });
    }

    @Override
    protected P getProxy() {
        return proxy;
    }
}