variablemanager.java

jspwiki source code,jspwiki source code

            //
            if( (context.getVariable( varName )) != null )
            {
                return context.getVariable( varName ).toString();
            }

            //
            //  Well, I guess it wasn't a final straw.  We also allow 
            //  variables from the session and the request (in this order).
            //

            HttpServletRequest req = context.getHttpRequest();
            if( req != null && req.getSession() != null )
            {
                HttpSession session = req.getSession();

                try
                {
                    String s;
                    
                    if( (s = (String)session.getAttribute( varName )) != null )
                        return s;

                    if( (s = context.getHttpParameter( varName )) != null )
                        return s;
                }
                catch( ClassCastException e ) {}
            }

            //
            // And the final straw: see if the current page has named metadata.
            //
            
            WikiPage pg = context.getPage();
            if( pg != null )
            {
                Object metadata = pg.getAttribute( varName );
                if( metadata != null )
                    return metadata.toString();
            }
            
            //
            // And the final straw part 2: see if the "real" current page has
            // named metadata. This allows a parent page to control a inserted
            // page through defining variables
            //
            WikiPage rpg = context.getRealPage();
            if( rpg != null )
            {
                Object metadata = rpg.getAttribute( varName );
                if( metadata != null )
                    return metadata.toString();
            }
            
            //
            // Next-to-final straw: attempt to fetch using property name
            // We don't allow fetching any other properties than those starting
            // with "jspwiki.".  I know my own code, but I can't vouch for bugs
            // in other people's code... :-)
            //
            
            if( varName.startsWith("jspwiki.") )
            {
                Properties props = context.getEngine().getWikiProperties();

                String s = props.getProperty( varName );
                if( s != null )
                {
                    return s;
                }
            }
            
            //
            //  Final defaults for some known quantities.
            //

            if( varName.equals( VAR_ERROR ) || varName.equals( VAR_MSG ) )
                return "";
  
            throw new NoSuchVariableException( "No variable "+varName+" defined." );
        }
        catch( Exception e )
        {
            log.info("Interesting exception: cannot fetch variable value",e);
        }
        return "";
    }

    /**
     *  This class provides the implementation for the different system variables.
     *  It is called via Reflection - any access to a variable called $xxx is mapped
     *  to getXxx() on this class.
     *  <p>
     *  This is a lot neater than using a huge if-else if branching structure
     *  that we used to have before.
     *  <p>
     *  Note that since we are case insensitive for variables, and VariableManager
     *  calls var.toLowerCase(), the getters for the variables do not have
     *  capitalization anywhere.  This may look a bit odd, but then again, this
     *  is not meant to be a public class.
     *  
     *  @since 2.7.0
     *
     */
    private static class SystemVariables
    {
        private WikiContext m_context;

        public SystemVariables(WikiContext context)
        {
            m_context=context;
        }

        public String getPagename()
        {
            return m_context.getPage().getName();
        }

        public String getApplicationname()
        {
            return m_context.getEngine().getApplicationName();
        }

        public String getJspwikiversion()
        {
            return Release.getVersionString();
        }

        public String getEncoding()
        {
            return m_context.getEngine().getContentEncoding();
        }

        public String getTotalpages()
        {
            return Integer.toString(m_context.getEngine().getPageCount());
        }

        public String getPageprovider()
        {
            return m_context.getEngine().getCurrentProvider();
        }

        public String getPageproviderdescription()
        {
            return m_context.getEngine().getCurrentProviderInfo();
        }

        public String getAttachmentprovider()
        {
            WikiProvider p = m_context.getEngine().getAttachmentManager().getCurrentProvider();
            return (p != null) ? p.getClass().getName() : "-";
        }

        public String getAttachmentproviderdescription()
        {
            WikiProvider p = m_context.getEngine().getAttachmentManager().getCurrentProvider();

            return (p != null) ? p.getProviderInfo() : "-";
        }

        public String getInterwikilinks()
        {
            StringBuffer res = new StringBuffer();

            for( Iterator i = m_context.getEngine().getAllInterWikiLinks().iterator(); i.hasNext(); )
            {
                if( res.length() > 0 ) res.append(", ");
                String link = (String) i.next();
                res.append( link );
                res.append( " --> " );
                res.append( m_context.getEngine().getInterWikiURL(link) );    
            }
            return res.toString();
        }

        public String getInlinedimages()
        {
            StringBuffer res = new StringBuffer();

            for( Iterator i = m_context.getEngine().getAllInlinedImagePatterns().iterator(); i.hasNext(); )
            {
                if( res.length() > 0 ) res.append(", ");

                String ptrn = (String) i.next();
                res.append(ptrn);
            }

            return res.toString();
        }

        @SuppressWarnings("deprecation")
        public String getPluginpath()
        {
            String s = m_context.getEngine().getPluginSearchPath();

            return (s == null) ? "-" : s;
        }

        public String getBaseurl()
        {
            return m_context.getEngine().getBaseURL();
        }

        public String getUptime()
        {
            Date now = new Date();
            long secondsRunning = (now.getTime() - m_context.getEngine().getStartTime().getTime()) / 1000L;

            long seconds = secondsRunning % 60;
            long minutes = (secondsRunning /= 60) % 60;
            long hours = (secondsRunning /= 60) % 24;
            long days = secondsRunning /= 24;

            return days + "d, " + hours + "h " + minutes + "m " + seconds + "s";
        }

        public String getLoginstatus()
        {
            WikiSession session = m_context.getWikiSession();
            return m_context.getBundle(InternationalizationManager.CORE_BUNDLE).getString( "varmgr." + session.getStatus());
        }

        public String getUsername()
        {
            Principal wup = m_context.getCurrentUser();
            
            ResourceBundle rb = m_context.getBundle( InternationalizationManager.CORE_BUNDLE );
            return wup != null ? wup.getName() : rb.getString( "varmgr.not.logged.in" );
        }

        public String getRequestcontext()
        {
            return m_context.getRequestContext();
        }

        public String getPagefilters()
        {
            List filters = m_context.getEngine().getFilterManager().getFilterList();
            StringBuffer sb = new StringBuffer();

            for (Iterator i = filters.iterator(); i.hasNext();)
            {
                PageFilter pf = (PageFilter) i.next();
                String f = pf.getClass().getName();

                if( pf instanceof InternalModule )
                    continue;

                if( sb.length() > 0 )
                    sb.append(", ");
                sb.append(f);
            }

            return sb.toString();
        }
    }

}