2 * Copyright (C) 2001, 2002 The Mir-coders group
4 * This file is part of Mir.
6 * Mir is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Mir is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Mir; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * In addition, as a special exception, The Mir-coders gives permission to link
21 * the code of this program with any library licensed under the Apache Software License,
22 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
23 * (or with modified versions of the above that use the same license as the above),
24 * and distribute linked combinations including the two. You must obey the
25 * GNU General Public License in all respects for all of the code used other than
26 * the above mentioned libraries. If you modify this file, you may extend this
27 * exception to your version of the file, but you are not obligated to do so.
28 * If you do not wish to do so, delete this exception statement from your version.
32 import java.lang.reflect.InvocationTargetException;
33 import java.lang.reflect.Method;
35 import javax.servlet.http.HttpServletRequest;
36 import javax.servlet.http.HttpServletResponse;
38 import mir.log.LoggerWrapper;
42 * Dispatcher, calls the method passed to ServletModule Class, through the "do"
43 * Parameter (via POST or GET)
45 * @version $Id: ServletModuleDispatch.java,v 1.15.2.1 2003/09/03 17:49:38 zapata Exp $
50 public final class ServletModuleDispatch {
52 private static LoggerWrapper logger = new LoggerWrapper("ServletModule.Dispatch");
53 private static final Class[] SIGNATURE = { HttpServletRequest.class, HttpServletResponse.class };
56 * private parameter-less constructor to prevent unwanted instantiation
59 private ServletModuleDispatch () {
63 * Method to dispatch servletmodule requests.
65 * @param aServletModule
68 * @throws ServletModuleExc
69 * @throws ServletModuleUserExc
70 * @throws ServletModuleFailure
73 public static void dispatch(ServletModule aServletModule, HttpServletRequest aRequest,
74 HttpServletResponse aResponse) throws ServletModuleExc, ServletModuleUserExc, ServletModuleFailure
76 String doParam = aRequest.getParameter("do");
77 logger.info("ServletModuleDispatch: " + aServletModule.toString() + " with method " + doParam);
78 if (doParam == null) {
79 if (aServletModule.defaultAction() != null)
80 doParam = aServletModule.defaultAction();
82 throw new ServletModuleExc("no parameter do supplied!");
86 Method method = aServletModule.getClass().getMethod(doParam,SIGNATURE);
88 method.invoke(aServletModule,new Object[] {aRequest,aResponse} );
91 else logger.debug("method lookup unsuccesful");
93 catch ( InvocationTargetException e) {
94 logger.error( "invocation target exception: " + e.toString());
95 e.getTargetException().printStackTrace(logger.asPrintWriter(LoggerWrapper.DEBUG_MESSAGE));
97 throw new ServletModuleFailure(e.getTargetException().getMessage(), e.getTargetException());
100 logger.error( "ServletModuleDispatch: " + t.toString());
101 throw new ServletModuleFailure(t);