protected AccessLogElement[] createLogElements() 
{
        if (log.isDebugEnabled()) {
            log.debug("decodePattern, pattern =" + pattern);
        }
        List< AccessLogElement > list = new ArrayList< AccessLogElement >();
        PatternTokenizer tokenizer = new PatternTokenizer(pattern);
        try {
            // Ignore leading whitespace.
            tokenizer.getWhiteSpaces();
            if (tokenizer.isEnded()) {
                log.info("pattern was just empty or whitespace");
                return null;
            }
            String token = tokenizer.getToken();
            while (token != null) {
                if (log.isDebugEnabled()) {
                    log.debug("token = " + token);
                }
                AccessLogElement element = getLogElement(token, tokenizer);
                if (element == null) {
                    break;
                }
                list.add(element);
                String whiteSpaces = tokenizer.getWhiteSpaces();
                if (whiteSpaces.length()  > 0) {
                    list.add(new StringElement(whiteSpaces));
                }
                if (tokenizer.isEnded()) {
                    break;
                }
                token = tokenizer.getToken();
            }
            if (log.isDebugEnabled()) {
                log.debug("finished decoding with element size of: " + list.size());
            }
            return (AccessLogElement[]) list.toArray(new AccessLogElement[0]);
        } catch (IOException e) {
            log.error("parse error", e);
            return null;
        }
}

 protected AccessLogElement getClientToServerElement(ExtendedAccessLogValve.PatternTokenizer tokenizer) throws IOException 
{
        if (tokenizer.hasSubToken()) {
            String token = tokenizer.getToken();
            if ("method".equals(token)) {
                return new MethodElement();
            } else if ("uri".equals(token)) {
                if (tokenizer.hasSubToken()) {
                    token = tokenizer.getToken();
                    if ("stem".equals(token)) {
                        return new RequestURIElement();
                    } else if ("query".equals(token)) {
                        return new AccessLogElement() {
                            public void addElement(StringBuffer buf, Date date,
                                    Request request, Response response,
                                    long time) {
                                String query = request.getQueryString();
                                if (query != null) {
                                    buf.append(query);
                                } else {
                                    buf.append('-");
                                }
                            }
                        };
                    }
                } else {
                    return new AccessLogElement() {
                        public void addElement(StringBuffer buf, Date date,
                                Request request, Response response, long time) {
                            String query = request.getQueryString();
                            if (query != null) {
                                buf.append(request.getRequestURI());
                            } else {
                                buf.append(request.getRequestURI());
                                buf.append('?");
                                buf.append(request.getQueryString());
                            }
                        }
                    };
                }
            }
        } else if (tokenizer.hasParameter()) {
            String parameter = tokenizer.getParameter();
            if (parameter == null) {
                log.error("No closing ) found for in decode");
                return null;
            }
            return new RequestHeaderElement(parameter);
        }
        log.error("The next characters couldn't be decoded: "
                + tokenizer.getRemains());
        return null;
}

 public String getInfo() 
{
    // ------------------------------------------------------------- Properties
        return (extendedAccessLogInfo);
}

Return descriptive information about this implementation.

 protected AccessLogElement getLogElement(String token,
    ExtendedAccessLogValve.PatternTokenizer tokenizer) throws IOException 
{
        if ("date".equals(token)) {
            return new DateElement();
        } else if ("time".equals(token)) {
            if (tokenizer.hasSubToken()) {
                String nextToken = tokenizer.getToken();
                if ("taken".equals(nextToken)) {
                    return new ElapsedTimeElement(false);                
                }
            } else {
                return new TimeElement();
            }
        } else if ("bytes".equals(token)) {
            return new ByteSentElement(true);
        } else if ("cached".equals(token)) {
            /* I don't know how to evaluate this! */
            return new StringElement("-");
        } else if ("c".equals(token)) {
            String nextToken = tokenizer.getToken();
            if ("ip".equals(nextToken)) {
                return new RemoteAddrElement();
            } else if ("dns".equals(nextToken)) {
                return new HostElement();
            }
        } else if ("s".equals(token)) {
            String nextToken = tokenizer.getToken();
            if ("ip".equals(nextToken)) {
                return new LocalAddrElement();
            } else if ("dns".equals(nextToken)) {
                return new AccessLogElement() {
                    public void addElement(StringBuffer buf, Date date,
                            Request request, Response response, long time) {
                        String value;
                        try {
                            value = InetAddress.getLocalHost().getHostName();
                        } catch (Throwable e) {
                            value = "localhost";
                        }
                        buf.append(value);
                    }
                };
            }
        } else if ("cs".equals(token)) {
            return getClientToServerElement(tokenizer);
        } else if ("sc".equals(token)) {
            return getServerToClientElement(tokenizer);
        } else if ("sr".equals(token) || "rs".equals(token)) {
            return getProxyElement(tokenizer);
        } else if ("x".equals(token)) {
            return getXParameterElement(tokenizer);
        }
        log.error("unable to decode with rest of chars starting: " + token);
        return null;
}

 protected AccessLogElement getProxyElement(ExtendedAccessLogValve.PatternTokenizer tokenizer) throws IOException 
{
        String token = null;
        if (tokenizer.hasSubToken()) {
            token = tokenizer.getToken();
            return new StringElement("-");
        } else if (tokenizer.hasParameter()) {
            tokenizer.getParameter();
            return new StringElement("-");
        }
        log.error("The next characters couldn't be decoded: " + token);
        return null;
}

 protected AccessLogElement getServerToClientElement(ExtendedAccessLogValve.PatternTokenizer tokenizer) throws IOException 
{
        if (tokenizer.hasSubToken()) {
            String token = tokenizer.getToken();
            if ("status".equals(token)) {
                return new HttpStatusCodeElement();
            } else if ("comment".equals(token)) {
                return new StringElement("?");
            }
        } else if (tokenizer.hasParameter()) {
            String parameter = tokenizer.getParameter();
            if (parameter == null) {
                log.error("No closing ) found for in decode");
                return null;
            }
            return new ResponseHeaderElement(parameter);
        }
        log.error("The next characters couldn't be decoded: "
                + tokenizer.getRemains());
        return null;
}

 protected AccessLogElement getServletRequestElement(String parameter) 
{
        if ("authType".equals(parameter)) {
            return new AccessLogElement() {
                public void addElement(StringBuffer buf, Date date,
                        Request request, Response response, long time) {
                    buf.append(wrap(request.getAuthType()));
                }
            };
        } else if ("remoteUser".equals(parameter)) {
            return new AccessLogElement() {
                public void addElement(StringBuffer buf, Date date,
                        Request request, Response response, long time) {
                    buf.append(wrap(request.getRemoteUser()));
                }
            };
        } else if ("requestedSessionId".equals(parameter)) {
            return new AccessLogElement() {
                public void addElement(StringBuffer buf, Date date,
                        Request request, Response response, long time) {
                    buf.append(wrap(request.getRequestedSessionId()));
                }
            };
        } else if ("requestedSessionIdFromCookie".equals(parameter)) {
            return new AccessLogElement() {
                public void addElement(StringBuffer buf, Date date,
                        Request request, Response response, long time) {
                    buf.append(wrap(""
                            + request.isRequestedSessionIdFromCookie()));
                }
            };
        } else if ("requestedSessionIdValid".equals(parameter)) {
            return new AccessLogElement() {
                public void addElement(StringBuffer buf, Date date,
                        Request request, Response response, long time) {
                    buf.append(wrap("" + request.isRequestedSessionIdValid()));
                }
            };
        } else if ("contentLength".equals(parameter)) {
            return new AccessLogElement() {
                public void addElement(StringBuffer buf, Date date,
                        Request request, Response response, long time) {
                    buf.append(wrap("" + request.getContentLength()));
                }
            };
        } else if ("characterEncoding".equals(parameter)) {
            return new AccessLogElement() {
                public void addElement(StringBuffer buf, Date date,
                        Request request, Response response, long time) {
                    buf.append(wrap(request.getCharacterEncoding()));
                }
            };
        } else if ("locale".equals(parameter)) {
            return new AccessLogElement() {
                public void addElement(StringBuffer buf, Date date,
                        Request request, Response response, long time) {
                    buf.append(wrap(request.getLocale()));
                }
            };
        } else if ("protocol".equals(parameter)) {
            return new AccessLogElement() {
                public void addElement(StringBuffer buf, Date date,
                        Request request, Response response, long time) {
                    buf.append(wrap(request.getProtocol()));
                }
            };
        } else if ("scheme".equals(parameter)) {
            return new AccessLogElement() {
                public void addElement(StringBuffer buf, Date date,
                        Request request, Response response, long time) {
                    buf.append(request.getScheme());
                }
            };
        } else if ("secure".equals(parameter)) {
            return new AccessLogElement() {
                public void addElement(StringBuffer buf, Date date,
                        Request request, Response response, long time) {
                    buf.append(wrap("" + request.isSecure()));
                }
            };
        }
        log.error("x param for servlet request, couldn't decode value: "
                + parameter);
        return null;
}

 protected AccessLogElement getXParameterElement(ExtendedAccessLogValve.PatternTokenizer tokenizer) throws IOException 
{
        if (!tokenizer.hasSubToken()) {
            log.error("x param in wrong format. Needs to be 'x-#(...)' read the docs!");
            return null;
        }
        String token = tokenizer.getToken();
        if (!tokenizer.hasParameter()) {
            log.error("x param in wrong format. Needs to be 'x-#(...)' read the docs!");
            return null;
        }
        String parameter = tokenizer.getParameter();
        if (parameter == null) {
            log.error("No closing ) found for in decode");
            return null;
        }
        if ("A".equals(token)) {
            return new ServletContextElement(parameter);
        } else if ("C".equals(token)) {
            return new CookieElement(parameter);
        } else if ("R".equals(token)) {
            return new RequestAttributeElement(parameter);
        } else if ("S".equals(token)) {
            return new SessionAttributeElement(parameter);
        } else if ("H".equals(token)) {
            return getServletRequestElement(parameter);
        } else if ("P".equals(token)) {
            return new RequestParameterElement(parameter);
        } else if ("O".equals(token)) {
            return new ResponseAllHeaderElement(parameter);
        }
        log.error("x param for servlet request, couldn't decode value: "
                + token);
        return null;
}

 protected synchronized  void open() 
{
        super.open();
        if (currentLogFile.length()==0) {
            writer.println("#Fields: " + pattern);
            writer.println("#Version: 2.0");
            writer.println("#Software: " + ServerInfo.getServerInfo());
        }
}

Open the new log file for the date specified by dateStamp.