8bcc80ddd7
(first workout of HTML Checker code) * modified the dictionary implementation to use a trie system rather than a set of HashSets, and also started using a new, much smaller dictionary * general bugfixes and cleanup on other items as needed
338 lines
10 KiB
Java
338 lines
10 KiB
Java
/*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* (the "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at <http://www.mozilla.org/MPL/>.
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*
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* Software distributed under the License is distributed on an "AS IS" basis, WITHOUT
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* WARRANTY OF ANY KIND, either express or implied. See the License for the specific
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* language governing rights and limitations under the License.
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*
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* The Original Code is the Venice Web Communities System.
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*
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* The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
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* for Silverwrist Design Studios. Portions created by Eric J. Bowersox are
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* Copyright (C) 2001 Eric J. Bowersox/Silverwrist Design Studios. All Rights Reserved.
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*
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* Contributor(s):
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*/
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package com.silverwrist.venice.servlets;
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import java.io.*;
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import java.util.*;
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import javax.servlet.*;
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import javax.servlet.http.*;
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import org.apache.log4j.*;
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import com.silverwrist.util.StringUtil;
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import com.silverwrist.venice.ValidationException;
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import com.silverwrist.venice.core.*;
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import com.silverwrist.venice.servlets.format.*;
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public class ConfDisplay extends VeniceServlet
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{
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/*--------------------------------------------------------------------------------
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* Static data members
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*--------------------------------------------------------------------------------
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*/
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private static Category logger = Category.getInstance(ConfDisplay.class.getName());
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/*--------------------------------------------------------------------------------
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* Internal functions
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*--------------------------------------------------------------------------------
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*/
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private static SIGContext getSIGParameter(ServletRequest request, UserContext user)
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throws ValidationException, DataException
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{
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String str = request.getParameter("sig");
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if (str==null)
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{ // no SIG parameter - bail out now!
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logger.error("SIG parameter not specified!");
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throw new ValidationException("No SIG specified.");
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} // end if
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try
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{ // turn the string into a SIGID, and thence to a SIGContext
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int sigid = Integer.parseInt(str);
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return user.getSIGContext(sigid);
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} // end try
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catch (NumberFormatException nfe)
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{ // error in Integer.parseInt
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logger.error("Cannot convert SIG parameter '" + str + "'!");
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throw new ValidationException("Invalid SIG parameter.");
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} // end catch
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} // end getSIGParameter
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private static ConferenceContext getConferenceParameter(ServletRequest request, SIGContext sig)
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throws ValidationException, DataException, AccessError
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{
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String str = request.getParameter("conf");
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if (str==null)
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{ // no conference parameter - bail out now!
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logger.error("Conference parameter not specified!");
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throw new ValidationException("No conference specified.");
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} // end if
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try
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{ // turn the string into a ConfID, and thence to a ConferenceContext
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int confid = Integer.parseInt(str);
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return sig.getConferenceContext(confid);
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} // end try
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catch (NumberFormatException nfe)
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{ // error in Integer.parseInt
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logger.error("Cannot convert conference parameter '" + str + "'!");
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throw new ValidationException("Invalid conference parameter.");
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} // end catch
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} // end getConferenceParameter
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private static TopicContext getTopicParameter(ServletRequest request, ConferenceContext conf)
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throws ValidationException, DataException, AccessError
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{
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String str = request.getParameter("top");
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if (StringUtil.isStringEmpty(str))
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return null; // no topic specified
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try
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{ // turn the string into a TopicID, and thence to a TopicContext
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short topicid = Short.parseShort(str);
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return conf.getTopic(topicid);
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} // end try
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catch (NumberFormatException nfe)
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{ // error in Integer.parseInt
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logger.error("Cannot convert topic parameter '" + str + "'!");
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throw new ValidationException("Invalid topic parameter.");
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} // end catch
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} // end getTopicParameter
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private static void getViewSortDefaults(ServletRequest request, int confid, TopicSortHolder tsc)
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throws ValidationException
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{
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String str = request.getParameter("view");
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if (!(StringUtil.isStringEmpty(str)))
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{ // we need to change the view parameter
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try
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{ // convert the parameter to an integer and then check it against defined values
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int p = Integer.parseInt(str);
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switch (p)
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{
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case ConferenceContext.DISPLAY_NEW:
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case ConferenceContext.DISPLAY_ACTIVE:
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case ConferenceContext.DISPLAY_ALL:
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case ConferenceContext.DISPLAY_HIDDEN:
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case ConferenceContext.DISPLAY_ARCHIVED:
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tsc.setViewOption(confid,p);
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break;
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default:
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throw new ValidationException("Invalid view parameter.");
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} // end switch
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} // end try
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catch (NumberFormatException nfe)
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{ // failure in parseInt
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logger.error("Cannot convert view parameter '" + str + "'!");
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throw new ValidationException("Invalid view parameter.");
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} // end catch
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} // end if
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str = request.getParameter("sort");
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if (!(StringUtil.isStringEmpty(str)))
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{ // we need to change the sort parameter
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try
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{ // convert the parameter to an integer and then check it against defined values
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int p = Integer.parseInt(str);
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int real_p = ((p<0) ? -p : p);
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switch (real_p)
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{
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case ConferenceContext.SORT_NUMBER:
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case ConferenceContext.SORT_NAME:
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case ConferenceContext.SORT_UNREAD:
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case ConferenceContext.SORT_TOTAL:
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case ConferenceContext.SORT_DATE:
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tsc.setSortOption(confid,p);
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break;
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default:
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throw new ValidationException("Invalid sort parameter.");
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} // end switch
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} // end try
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catch (NumberFormatException nfe)
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{ // failure in parseInt
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logger.error("Cannot convert sort parameter '" + str + "'!");
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throw new ValidationException("Invalid sort parameter.");
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} // end catch
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} // end if
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} // end getViewSortDefaults
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/*--------------------------------------------------------------------------------
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* Overrides from class HttpServlet
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*--------------------------------------------------------------------------------
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*/
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public String getServletInfo()
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{
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String rc = "ConfDisplay servlet - Display of conference topic and message lists\n"
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+ "Part of the Venice Web Communities System\n";
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return rc;
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} // end getServletInfo
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public void doGet(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException
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{
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UserContext user = getUserContext(request);
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RenderData rdat = createRenderData(request,response);
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String page_title = null;
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Object content = null;
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SIGContext sig = null; // SIG context
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ConferenceContext conf = null; // conference context
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TopicContext topic = null; // topic context
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try
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{ // this outer try is to catch ValidationException
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try
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{ // all commands require a SIG parameter
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sig = getSIGParameter(request,user);
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changeMenuSIG(request,sig);
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if (logger.isDebugEnabled())
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logger.debug("found SIG #" + String.valueOf(sig.getSIGID()));
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} // end try
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catch (DataException de)
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{ // error looking up the SIG
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page_title = "Database Error";
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content = new ErrorBox(page_title,"Database error finding SIG: " + de.getMessage(),"top");
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} // end catch
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if (content==null)
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{ // we got the SIG parameter OK
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try
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{ // all commands require a conference parameter
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conf = getConferenceParameter(request,sig);
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if (logger.isDebugEnabled())
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logger.debug("found conf #" + String.valueOf(conf.getConfID()));
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} // end try
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catch (DataException de)
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{ // error looking up the conference
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page_title = "Database Error";
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content = new ErrorBox(page_title,"Database error finding conference: " + de.getMessage(),"top");
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} // end catch
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} // end if
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if (content==null)
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{ // we got the conference parameter OK
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try
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{ // there's an optional topic parameter
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topic = getTopicParameter(request,conf);
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if (logger.isDebugEnabled())
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{ // do a little debugging output
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if (topic!=null)
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logger.debug("found topic #" + String.valueOf(topic.getTopicID()));
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else
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logger.debug("no topic specified");
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} // end if
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} // end try
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catch (DataException de)
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{ // error looking up the conference
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page_title = "Database Error";
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content = new ErrorBox(page_title,"Database error finding topic: " + de.getMessage(),"top");
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} // end catch
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} // end if
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} // end try
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catch (ValidationException ve)
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{ // these all get handled in pretty much the same way
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page_title = "Error";
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content = new ErrorBox(null,ve.getMessage(),"top");
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} // end catch
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catch (AccessError ae)
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{ // these all get handled in pretty much the same way
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page_title = "Access Error";
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content = new ErrorBox(page_title,ae.getMessage(),"top");
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} // end catch
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if (content==null)
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{ // OK, let's handle the display now
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if (topic!=null)
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{ // we're handling messages within a single topic
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if (logger.isDebugEnabled())
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logger.debug("MODE: display messages in topic");
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// TODO: handle this somehow
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} // end if
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else
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{ // we're displaying the conference's topic list
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if (logger.isDebugEnabled())
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logger.debug("MODE: display topics in conference");
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TopicSortHolder opts = TopicSortHolder.retrieve(request.getSession(true));
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try
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{ // get any changes to view or sort options
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getViewSortDefaults(request,conf.getConfID(),opts);
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// create the topic list
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content = new TopicListing(request,sig,conf,opts.getViewOption(conf.getConfID()),
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opts.getSortOption(conf.getConfID()));
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page_title = "Topics in " + conf.getName();
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} // end try
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catch (ValidationException ve)
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{ // there was some sort of a parameter error in the display
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page_title = "Error";
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content = new ErrorBox(null,ve.getMessage(),"top");
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} // end catch
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catch (DataException de)
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{ // there was a database error retrieving topics
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page_title = "Database Error";
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content = new ErrorBox(page_title,"Database error listing topics: " + de.getMessage(),"top");
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} // end catch
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catch (AccessError ae)
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{ // we were unable to retrieve the topic list
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page_title = "Access Error";
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content = new ErrorBox(page_title,ae.getMessage(),"top");
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} // end catch
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} // end else
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} // end if
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BaseJSPData basedat = new BaseJSPData(page_title,"confdisp?" + request.getQueryString(),content);
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basedat.transfer(getServletContext(),rdat);
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} // end doGet
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} // end class ConfDisplay
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