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Turbine is a servlet based framework that allows experienced Java developers to quickly build secure web applications. Parts of Turbine can also be used independently of the web portion of Turbine as well. In other words, we strive to make portions of Turbine easily available for use in other applications.

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package org.apache.turbine.modules.layouts;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

import org.apache.turbine.TurbineConstants;
import org.apache.turbine.pipeline.PipelineData;
import org.apache.turbine.util.template.TemplateNavigation;
import org.apache.turbine.util.template.TemplateScreen;
import org.apache.velocity.context.Context;

/**
 * This Layout module allows Velocity templates
 * to be used as layouts. It will stream directly the output of
 * the layout and navigation templates to the output writer without
 * using a screen. Use this if you have a large page to output
 * and won't buffer it in the memory.
 *
 * @author Raphaël Luta
 * @author John D. McNally
 * @author Dave Bryson
 * @author Henning P. Schmiedehausen
 * @author Peter Courcoux
 * @version $Id: VelocityDirectLayout.java 1854797 2019-03-04 20:41:39Z tv $
 */
public class VelocityDirectLayout extends VelocityLayout
{
    /**
     * @see org.apache.turbine.modules.layouts.VelocityLayout#populateContext(org.apache.turbine.pipeline.PipelineData, org.apache.velocity.context.Context)
     */
    @Override
    protected void populateContext(PipelineData pipelineData, Context context) throws Exception
    {
        // variable for the screen in the layout template
        context.put(TurbineConstants.SCREEN_PLACEHOLDER,
                    new TemplateScreen(pipelineData));

        // variable to reference the navigation screen in the layout template
        context.put(TurbineConstants.NAVIGATION_PLACEHOLDER,
                    new TemplateNavigation(pipelineData));
    }
}