Examples of org.apache.velocity.context.InternalContextAdapterImpl

org.apache.velocity.context.InternalContextAdapterImpl
This adapter class is the container for all context types for internal use. The AST now uses this class rather than the app-level Context interface to allow flexibility in the future. Currently, we have two context interfaces which must be supported :
- Context : used for application/template data access
- InternalHousekeepingContext : used for internal housekeeping and caching
- InternalWrapperContext : used for getting root cache context and other such.
- InternalEventContext : for event handling.
This class implements the two interfaces to ensure that all methods are supported. When adding to the interfaces, or adding more context functionality, the interface is the primary definition, so alter that first and then all classes as necessary. As of this writing, this would be the only class affected by changes to InternalContext This class ensures that an InternalContextBase is available for internal use. If an application constructs their own Context-implementing object w/o subclassing AbstractContext, it may be that support for InternalContext is not available. Therefore, InternalContextAdapter will create an InternalContextBase if necessary for this support. Note that if this is necessary, internal information such as node-cache data will be lost from use to use of the context. This may or may not be important, depending upon application. @author Geir Magnusson Jr. @version $Id: InternalContextAdapterImpl.java 291585 2005-09-26 08:56:23Z henning $

    
    
    private static void velocityLogError(Class cl){
      if(velocityCtx.get() != null){
        Context ctx =  velocityCtx.get();
        InternalContextAdapter ica =  new InternalContextAdapterImpl(ctx);
        com.dotcms.repackage.org.apache.log4j.Logger logger = map.get(VelocityServlet.class);
        logger.error("#--------------------------------------------------------------------------------------");
        logger.error("#");
        if(ica.getCurrentMacroName() != null){
          logger.error("# Velocity Error");
        }


        if(ctx.get("VTLSERVLET_URI") != null && ctx.get("host") != null ){
          logger.error("# on url      : " + ((Host) ctx.get("host")).getHostname()  + ctx.get("VTLSERVLET_URI") );
        }
        else if(ctx.get("VTLSERVLET_URI") != null ){
          logger.error("# on uri      : " + ctx.get("VTLSERVLET_URI") );
        }
        else if(ctx.get("host") != null){
          logger.error("# on host     : " + ((Host) ctx.get("host")).getHostname() );
        }
        if(ctx.get("request") != null){
          HttpServletRequest req  = (HttpServletRequest)ctx.get("request");
          if(req.getAttribute("javax.servlet.forward.request_uri") != null){
            logger.error("# on req      : " + req.getAttribute("javax.servlet.forward.request_uri") );
          }
          
         }
        if(ica.getCurrentMacroName() != null){
          logger.error("# with macro  : #" + ica.getCurrentMacroName());
        }
        if(ica.getCurrentTemplateName() != null){
          logger.error("# on template : " + normalizeTemplate(ica.getCurrentTemplateName()));
        }
        logger.error("#    stack:");
        for(Object obj : ica.getTemplateNameStack()){
        logger.error("#    -- " + normalizeTemplate(obj));
        }
        logger.error("#");
        logger.error("#--------------------------------------------------------------------------------------");
      }

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                          String logTag, SimpleNode nodeTree)
    {
        /*
         * we want to init then render
         */
        InternalContextAdapterImpl ica =
            new InternalContextAdapterImpl(context);


        ica.pushCurrentTemplateName(logTag);


        try
        {
            try
            {
                nodeTree.init(ica, this);
            }
            catch (TemplateInitException pex)
            {
                throw new ParseErrorException(pex, null);
            }
            /**
             * pass through application level runtime exceptions
             */
            catch(RuntimeException e)
            {
                throw e;
            }
            catch(Exception e)
            {
                String msg = "RuntimeInstance.render(): init exception for tag = "+logTag;
                Logger.error(this,msg, e);
                throw new VelocityException(msg, e);
            }


            try
            {
                if (provideEvaluateScope)
                {
                    Object previous = ica.get(evaluateScopeName);
                    context.put(evaluateScopeName, new Scope(this, previous));
                }
                nodeTree.render(ica, writer);
            }
            catch (StopCommand stop)
            {
                if (!stop.isFor(this))
                {
                    throw stop;
                }
                else if (Logger.isDebugEnabled(this.getClass()))
                {
                    Logger.debug(this,stop.getMessage());
                }
            }
            catch (IOException e)
            {
                throw new VelocityException("IO Error in writer: " + e.getMessage(), e);
            }
        }
        finally
        {
            ica.popCurrentTemplateName();
            if (provideEvaluateScope)
            {
                Object obj = ica.get(evaluateScopeName);
                if (obj instanceof Scope)
                {
                    Scope scope = (Scope)obj;
                    if (scope.getParent() != null)
                    {
                        ica.put(evaluateScopeName, scope.getParent());
                    }
                    else if (scope.getReplaced() != null)
                    {
                        ica.put(evaluateScopeName, scope.getReplaced());
                    }
                    else
                    {
                        ica.remove(evaluateScopeName);
                    }
                }
            }
        }

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        Template tesp1 = engine.getTemplate("/live/"+w.getIdentifier()+"_2."+contentEXT);


        Context ctx = VelocityUtil.getWebContext(requestProxy, responseProxy);
        StringWriter writer=new StringWriter();
        teng1.merge(ctx, writer);
        contentTester.render(new InternalContextAdapterImpl(ctx), writer);
        assertEquals("code:Initial code",writer.toString());
        ctx = VelocityUtil.getWebContext(requestProxy, responseProxy);
        writer=new StringWriter();
        tesp1.merge(ctx, writer);
        contentTester.render(new InternalContextAdapterImpl(ctx), writer);
        assertEquals("code:Initial code",writer.toString());


        Contentlet w2=contentletAPI.checkout(w.getInode(), user, false);
        w2.setStringProperty("code", "Modified Code to make templates different");
        w2 = contentletAPI.checkin(w2, user, false);
        contentletAPI.publish(w2, user, false);
        contentletAPI.isInodeIndexed(w2.getInode(),true);


        // now if everything have been cleared correctly those should match again
        Template teng3 = engine.getTemplate("/live/"+w.getIdentifier()+"_1."+contentEXT);
        Template tesp3 = engine.getTemplate("/live/"+w.getIdentifier()+"_2."+contentEXT);
        ctx = VelocityUtil.getWebContext(requestProxy, responseProxy);
        writer=new StringWriter();
        teng3.merge(ctx, writer);
        contentTester.render(new InternalContextAdapterImpl(ctx), writer);
        assertEquals("code:Modified Code to make templates different",writer.toString());
        ctx = VelocityUtil.getWebContext(requestProxy, responseProxy);
        writer=new StringWriter();
        tesp3.merge(ctx, writer);
        contentTester.render(new InternalContextAdapterImpl(ctx), writer);
        assertEquals("code:Modified Code to make templates different",writer.toString());


        // clean up
        APILocator.getVersionableAPI().removeLive(w2);
        contentletAPI.archive(w2, user, false);

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