private void initializeIntrospection()

in velocity-engine-core/src/main/java/org/apache/velocity/runtime/RuntimeInstance.java [422:499]
66 lines of code
10 McCabe index (conditional complexity)

    private void initializeIntrospection()
    {
        String[] uberspectors = configuration.getStringArray(RuntimeConstants.UBERSPECT_CLASSNAME);
        for (String rm : uberspectors)
        {
            Object o = null;

            try
            {
                o = ClassUtils.getNewInstance(rm);
            }
            catch (ClassNotFoundException cnfe)
            {
                String err = "The specified class for Uberspect (" + rm
                    + ") does not exist or is not accessible to the current classloader.";
                log.error(err);
                throw new VelocityException(err, cnfe);
            }
            catch (InstantiationException ie)
            {
                throw new VelocityException("Could not instantiate class '" + rm + "'", ie);
            }
            catch (IllegalAccessException ae)
            {
                throw new VelocityException("Cannot access class '" + rm + "'", ae);
            }

            if (!(o instanceof Uberspect))
            {
                String err = "The specified class for Uberspect ("
                    + rm + ") does not implement " + Uberspect.class.getName()
                    + "; Velocity is not initialized correctly.";

                log.error(err);
                throw new VelocityException(err);
            }

            Uberspect u = (Uberspect) o;

            if (u instanceof RuntimeServicesAware)
            {
                ((RuntimeServicesAware) u).setRuntimeServices(this);
            }

            if (uberSpect == null)
            {
                uberSpect = u;
            } else
            {
                if (u instanceof ChainableUberspector)
                {
                    ((ChainableUberspector) u).wrap(uberSpect);
                    uberSpect = u;
                } else
                {
                    uberSpect = new LinkingUberspector(uberSpect, u);
                }
            }
        }

        if(uberSpect != null)
        {
            uberSpect.init();
        }
        else
        {
           /*
            *  someone screwed up.  Lets not fool around...
            */

           String err = "It appears that no class was specified as the"
           + " Uberspect.  Please ensure that all configuration"
           + " information is correct.";

           log.error(err);
           throw new VelocityException(err);
        }
    }