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A reactive Java web server.

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/*
 * Copyright (c) 1998-2015 Caucho Technology -- all rights reserved
 *
 * This file is part of Baratine(TM)
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Baratine is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Baratine is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Baratine; if not, write to the
 *
 *   Free Software Foundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.v5.ramp.jamp;

import io.baratine.web.RequestWeb;

import java.io.IOException;

/**
 * Parameter parsing.
 */
abstract class JampArgWithDefault extends JampArg
{
  private final JampMarshal _marshal;
  private final String _defaultValue;
  
  JampArgWithDefault(JampMarshal marshal,
                     String defaultValue)
  {
    _marshal = marshal;
    _defaultValue = defaultValue;
  }
  
  @Override
  Object get(RequestWeb req,
             String pathInfo)
    throws IOException
  {
    String value = getStringValue(req, pathInfo);
    
    if (value == null) {
      value = _defaultValue;
    }
    
    return _marshal.toObject(value);
  }
  
  protected String getStringValue(RequestWeb req,
                                  String pathInfo)
  {
    return null;
  }
}