/*
 * =================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001-2003 The Apache Software Foundation.  All 
 * rights reserved.
 *
 * Redistribution and use in source and binary forms, with or 
 * without modification, are permitted provided that the following 
 * conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. The end-user documentation included with the redistribution, 
 *    if any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software 
 *    itself, if and wherever such third-party acknowlegements 
 *    normally appear.
 *
 * 4. The names "The Jakarta Project", "junitbook", "jia", 
 *    "JUnit in Action" and "Apache Software Foundation" must not be 
 *    used to endorse or promote products derived from this software 
 *    without prior written permission. For written permission, 
 *    please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
 * ITS 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.
 * =================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For 
 * more information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */
package junitbook.pages;

import java.util.Collection;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class AdminServlet extends HttpServlet
{
    public static final String COMMAND_PARAM = "command";
     
    public String getCommand(HttpServletRequest request)
        throws ServletException
    {
        String command = request.getParameter(COMMAND_PARAM);
        if (command == null)
        {
            throw new ServletException("Missing parameter ["
                + COMMAND_PARAM + "]");
        }
        return command;
    }

    public void callView(HttpServletRequest request,
        HttpServletResponse response) 
        throws IOException, ServletException
    {
        request.getRequestDispatcher("/results.jsp")
            .forward(request, response);
    }

    public Collection executeCommand(String command) 
        throws Exception
    {
        throw new RuntimeException("not implemented");
    }

    public void doGet(HttpServletRequest request,
        HttpServletResponse response) throws ServletException
    {
        try
        {
            Collection results = 
                executeCommand(getCommand(request));
            request.setAttribute("results", results);
            callView(request, response);
        }
        catch (Exception e)
        {
            throw new ServletException(
                "Failed to execute command", e);
        }
    }
}