/*
 * Copyright (c) 2013, Michael Grossmann
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * * Neither the name of the jo-widgets.org nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
package org.jowidgets.spi.impl.rwt;

import org.eclipse.rap.rwt.application.EntryPoint;
import org.eclipse.rap.rwt.service.ServerPushSession;
import org.jowidgets.api.toolkit.Toolkit;
import org.jowidgets.util.Assert;

public class RwtEntryPoint implements EntryPoint {

    private final Runnable runnable;

    public RwtEntryPoint(final Runnable runnable) {
        Assert.paramNotNull(runnable, "runnable");
        this.runnable = runnable;
    }

    @Override
    public final int createUI() {
        if (!Toolkit.isInitialized()) {
            Toolkit.initialize(new RwtToolkitProvider());
            RwtUiDefaultsInitializer.initialize();
        }
        final ServerPushSession pushSession = new ServerPushSession();
        pushSession.start();
        try {
            runnable.run();
        }
        finally {
            pushSession.stop();
        }
        return 0;
    }
}