private boolean renderOutput()

in velocity-engine-core/src/main/java/org/apache/velocity/runtime/directive/Include.java [198:286]
53 lines of code
10 McCabe index (conditional complexity)

    private boolean renderOutput( Node node, InternalContextAdapter context,
                                  Writer writer )
        throws IOException, MethodInvocationException,
               ResourceNotFoundException
    {
        if ( node == null )
        {
            log.error("#include() null argument");
            return false;
        }

        /*
         *  does it have a value?  If you have a null reference, then no.
         */
        Object value = node.value( context );
        if ( value == null)
        {
            log.error("#include() null argument");
            return false;
        }

        /*
         *  get the path
         */
        String sourcearg = value.toString();

        /*
         *  check to see if the argument will be changed by the event handler
         */

        String arg = EventHandlerUtil.includeEvent( rsvc, context, sourcearg, context.getCurrentTemplateName(), getName() );

        /*
         *   a null return value from the event cartridge indicates we should not
         *   input a resource.
         */
        boolean blockinput = false;
        if (arg == null)
            blockinput = true;

        Resource resource = null;

        try
        {
            if (!blockinput)
                resource = getResource(arg, getInputEncoding(context));
        }
        catch ( ResourceNotFoundException rnfe )
        {
            /*
             * the arg wasn't found.  Note it and throw
             */
            log.error("#" + getName() + "(): cannot find resource '{}', called at {}",
                      arg, StringUtils.formatFileString(this));
            throw rnfe;
        }

        /*
         * pass through application level runtime exceptions
         */
        catch( RuntimeException e )
        {
            log.error("#" + getName() + "(): arg = '{}', called at {}",
                      arg, StringUtils.formatFileString(this));
            throw e;
        }
        catch (Exception e)
        {
            String msg = "#" + getName() + "(): arg = '" + arg +
                        "', called at " + StringUtils.formatFileString(this);
            log.error(msg, e);
            throw new VelocityException(msg, e, rsvc.getLogContext().getStackTrace());
        }


        /*
         *    note - a blocked input is still a successful operation as this is
         *    expected behavior.
         */

        if ( blockinput )
            return true;

        else if ( resource == null )
            return false;

        writer.write((String)resource.getData());
        return true;
    }