jforum example source code file (Diff.jsp)

This example jforum source code file (Diff.jsp) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - jforum tags/keywords

integer, integer, jspwiki, jspwiki, logger, string, string, wikicontext, wikiengine, wikipage, wikipage

The jforum Diff.jsp source code

<%@ page import="org.apache.log4j.*" %>
<%@ page import="com.ecyrd.jspwiki.*" %>
<%@ page import="com.ecyrd.jspwiki.tags.InsertDiffTag" %>
<%@ page errorPage="/Error.jsp" %>
<%@ taglib uri="/WEB-INF/jspwiki.tld" prefix="wiki" %>

<%! 
    public void jspInit()
    {
        wiki = WikiEngine.getInstance( getServletConfig() );
    }

    Logger log = Logger.getLogger("JSPWiki"); 
    WikiEngine wiki;
%>

<%
    // Create wiki context and check for authorization
    WikiContext wikiContext = wiki.createContext( request, WikiContext.DIFF );
    if(!wikiContext.hasAccess( response )) return;
    String pagereq = wikiContext.getName();

    String pageurl = wiki.encodeName( pagereq );

    // If "r1" is null, then assume current version (= -1)
    // If "r2" is null, then assume the previous version (=current version-1)

    // FIXME: There is a set of unnecessary conversions here: InsertDiffTag
    //        does the String->int conversion anyway.

    WikiPage wikipage = wikiContext.getPage();

    String srev1 = request.getParameter("r1");
    String srev2 = request.getParameter("r2");

    int ver1 = -1, ver2 = -1;

    if( srev1 != null )
    {
        ver1 = Integer.parseInt( srev1 );
    }

    if( srev2 != null )
    {
        ver2 = Integer.parseInt( srev2 );
    }
    else
    {
        int lastver = wikipage.getVersion();

        if( lastver > 1 )
        {
            ver2 = lastver-1;
        }
    }

    pageContext.setAttribute( InsertDiffTag.ATTR_OLDVERSION,
                              new Integer(ver1),
                              PageContext.REQUEST_SCOPE );
    pageContext.setAttribute( InsertDiffTag.ATTR_NEWVERSION,
                              new Integer(ver2),
                              PageContext.REQUEST_SCOPE );

    // log.debug("Request for page diff for '"+pagereq+"' from "+request.getRemoteAddr()+" by "+request.getRemoteUser()+".  R1="+ver1+", R2="+ver2 );

    // Set the content type and include the response content
    response.setContentType("text/html; charset="+wiki.getContentEncoding() );
    String contentPage = wiki.getTemplateManager().findJSP( pageContext,
                                                            wikiContext.getTemplate(),
                                                            "ViewTemplate.jsp" );
%><wiki:Include page="<%=contentPage%>" />