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 $

                          String logTag, SimpleNode nodeTree) throws IOException
    {
        /*
         * 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);
            }
            /**
             * pass through application level runtime exceptions
             */
            catch(RuntimeException e)
            {
                throw e;
            }
            catch(Exception e)
            {
                String msg = "RuntimeInstance.render(): init exception for tag = "+logTag;
                getLog().error(msg, e);
                throw new VelocityException(msg, e);
            }


            /*
             *  now render, and let any exceptions fly
             */
            nodeTree.render(ica, writer);
        }
        finally
        {
            ica.popCurrentTemplateName();
        }


        return true;
    }

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    public void testLocalscopePutDoesntLeakButGetDoes() 
    {
        VelocityContext base = new VelocityContext();
        base.put("outsideVar", "value1");


        ProxyVMContext vm = new ProxyVMContext(new InternalContextAdapterImpl(base), this.instance, true);
        vm.put("newLocalVar", "value2");


        // New variable put doesn't leak
        assertNull(base.get("newLocalVar"));
        assertEquals("value2", vm.get("newLocalVar"));

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    {
        /*
         *  send an empty InternalContextAdapter down into the AST to initialize it
         */


        InternalContextAdapterImpl ica = new InternalContextAdapterImpl(  new VelocityContext() );


        try
        {
            /*
             *  put the current template name on the stack
             */


            ica.pushCurrentTemplateName( name );
            ica.setCurrentResource( this );


            /*
             *  init the AST
             */


            ((SimpleNode)data).init( ica, rsvc);
        }
        finally
        {
            /*
             *  in case something blows up...
             *  pull it off for completeness
             */


            ica.popCurrentTemplateName();
            ica.setCurrentResource( null );
        }


    }

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            /*
             *  create an InternalContextAdapter to carry the user Context down
             *  into the rendering engine.  Set the template name and render()
             */


            InternalContextAdapterImpl ica = new InternalContextAdapterImpl( context );


            /**
             * Set the macro libraries
             */
            ica.setMacroLibraries(macroLibraries);


            if (macroLibraries != null)
            {
                for (int i = 0; i < macroLibraries.size(); i++)
                {
                    /**
                     * Build the macro library
                     */
                    try
                    {
                        rsvc.getTemplate((String) macroLibraries.get(i));
                    }
                    catch (ResourceNotFoundException re)
                    {
                        /*
                        * the macro lib wasn't found.  Note it and throw
                        */
                        rsvc.getLog().error("template.merge(): " +
                                "cannot find template " +
                                (String) macroLibraries.get(i));
                        throw re;
                    }
                    catch (ParseErrorException pe)
                    {
                        /*
                        * the macro lib was found, but didn't parse - syntax error
                        *  note it and throw
                        */
                        rsvc.getLog().error("template.merge(): " +
                                "syntax error in template " +
                                (String) macroLibraries.get(i) + ".");
                        throw pe;
                    }
                    
                    catch (Exception e)
                    {
                        throw new RuntimeException("Template.merge(): parse failed in template  " +
                                (String) macroLibraries.get(i) + ".", e);
                    }
                }
            }


            try
            {
                ica.pushCurrentTemplateName( name );
                ica.setCurrentResource( this );


                ( (SimpleNode) data ).render( ica, writer);
            }
            finally
            {
                /*
                 *  lets make sure that we always clean up the context
                 */
                ica.popCurrentTemplateName();
                ica.setCurrentResource( null );
            }
        }
        else
        {
            /*

View Full Code Here

                          String logTag, SimpleNode nodeTree) throws IOException
    {
        /*
         * 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);
            }
            /**
             * pass through application level runtime exceptions
             */
            catch(RuntimeException e)
            {
                throw e;
            }
            catch(Exception e)
            {
                String msg = "RuntimeInstance.render(): init exception for tag = "+logTag;
                getLog().error(msg, e);
                throw new VelocityException(msg, e);
            }


            /*
             *  now render, and let any exceptions fly
             */
            nodeTree.render(ica, writer);
        }
        finally
        {
            ica.popCurrentTemplateName();
        }


        return true;
    }

View Full Code Here

         * to prevent any changes to the current context.
         */


        if (nodeTree != null)
        {
            InternalContextAdapterImpl ica =
                new InternalContextAdapterImpl( new EvaluateContext(context, rsvc) );


            ica.pushCurrentTemplateName( templateName );


            try
            {
                try
                {
                    nodeTree.init( ica, rsvc );
                }
                catch (TemplateInitException pex)
                {
                    Info info = new Info( templateName, node.getLine(), node.getColumn() );
                    throw  new ParseErrorException( pex.getMessage(), info );
                }


                try 
                {
                    /*
                     *  now render, and let any exceptions fly
                     */
                    nodeTree.render( ica, writer );
                }
                catch (ParseErrorException pex)
                {
                    // convert any parsing errors to the correct line/col
                    Info info = new Info( templateName, node.getLine(), node.getColumn() );
                    throw  new ParseErrorException( pex.getMessage(), info );
                }
            }
            finally
            {
                ica.popCurrentTemplateName();
            }


            return true;
        }

View Full Code Here

         * now we want to init and render
         */


        if (nodeTree != null)
        {
            InternalContextAdapterImpl ica = 
                new InternalContextAdapterImpl( context );
            
            ica.pushCurrentTemplateName( logTag );
            
            try
            {
                try
                {
                    nodeTree.init( ica, ri );
                }
                catch( Exception e )
                {
                    ri.error("Velocity.evaluate() : init exception for tag = " 
                                  + logTag + " : " + e );
                }
                
                /*
                 *  now render, and let any exceptions fly
                 */


                nodeTree.render( ica, writer );
            }
            finally
            {
                ica.popCurrentTemplateName();
            }
            
            return true;
        }

View Full Code Here


        vp.setupMacro( p, types  );
      
        try
        {
            InternalContextAdapterImpl ica 
                = new InternalContextAdapterImpl( context );
            
            try
            {
                ica.pushCurrentTemplateName( namespace );
                vp.render( ica, writer, null);
            }
            finally
            {
                ica.popCurrentTemplateName();
            }
        }
        catch (Exception e )
        {
            ri.error("Velocity.invokeVelocimacro() : " + e );

View Full Code Here

    {
        /*
         *  send an empty InternalContextAdapter down into the AST to initialize it
         */
        
        InternalContextAdapterImpl ica = new InternalContextAdapterImpl(  new VelocityContext() );


        try
        {
            /*
             *  put the current template name on the stack
             */


            ica.pushCurrentTemplateName( name );
            
            /*
             *  init the AST
             */


            ((SimpleNode)data).init( ica, rsvc);
        }
        finally
        {
            /*  
             *  in case something blows up...
             *  pull it off for completeness
             */


            ica.popCurrentTemplateName();
        }


    }

View Full Code Here

            /*
             *  create an InternalContextAdapter to carry the user Context down
             *  into the rendering engine.  Set the template name and render()
             */


            InternalContextAdapterImpl ica = new InternalContextAdapterImpl( context );


            try
            {
                ica.pushCurrentTemplateName( name );
                ica.setCurrentResource( this );


                ( (SimpleNode) data ).render( ica, writer);
            }
            finally
            {
                /*
                 *  lets make sure that we always clean up the context 
                 */
                ica.popCurrentTemplateName();
                ica.setCurrentResource( null );
            }
        }
        else
        {
            /*

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