ProxyImpl.java

/*
 * Copyright 2011 ArcBees 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.gwtplatform.mvp.client.proxy;

import javax.inject.Inject;

import com.google.gwt.event.shared.GwtEvent;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.web.bindery.event.shared.EventBus;
import com.gwtplatform.common.client.IndirectProvider;
import com.gwtplatform.mvp.client.Presenter;

/**
 * @param <P> The presenter's type.
 */
public class ProxyImpl<P extends Presenter<?, ?>> implements Proxy<P> {

    protected IndirectProvider<P> presenter;
    protected EventBus eventBus;

    /**
     * Creates a Proxy class for a specific presenter.
     */
    public ProxyImpl() {
    }

    @Override
    public void getPresenter(NotifyingAsyncCallback<P> callback) {
        callback.prepare();
        presenter.get(callback);
        callback.checkLoading();
    }

    @SuppressWarnings("unchecked")
    @Override
    public void getRawPresenter(NotifyingAsyncCallback<Presenter<?, ?>> callback) {
        callback.prepare();
        presenter.get((AsyncCallback<P>) callback);
        callback.checkLoading();
    }

    /**
     * Injects the various resources and performs other bindings.
     * <p/>
     * Never call directly, it should only be called by GIN. Method injection is
     * used instead of constructor injection, because the latter doesn't work well
     * with GWT generators.
     *
     * @param placeManager The {@link PlaceManager}. Ignored.
     * @param eventBus     The {@link EventBus}.
     */
    @Inject
    protected void bind(final PlaceManager placeManager, EventBus eventBus) {
        this.eventBus = eventBus;
    }

    @Override
    public void fireEvent(GwtEvent<?> event) {
        eventBus.fireEventFromSource(event, this);
    }

    @Override
    public final EventBus getEventBus() {
        return eventBus;
    }
}