public String doMapping()

in src/java/org/apache/turbine/services/template/mapper/ClassMapper.java [102:178]
57 lines of code
9 McCabe index (conditional complexity)

	public String doMapping(String template)
    {
        log.debug("doMapping({})", template);

        // Copy our elements into an array
        List<String> components
            = new ArrayList<>(Arrays.asList(StringUtils.split(
                                              template,
                                              String.valueOf(TemplateService.TEMPLATE_PARTS_SEPARATOR))));
        int componentSize = components.size() - 1 ;

        // This method never gets an empty string passed.
        // So this is never < 0
        String className = components.get(componentSize);
        components.remove(componentSize--);

        log.debug("className is {}", className);

        // Strip off a possible Extension
        int dotIndex = className.lastIndexOf(TemplateService.EXTENSION_SEPARATOR);
        className = (dotIndex < 0) ? className : className.substring(0, dotIndex);

        // This is an optimization. If the name we're looking for is
        // already the default name for the template, don't do a "first run"
        // which looks for an exact match.
        boolean firstRun = !className.equals(TemplateService.DEFAULT_NAME);

        for(;;)
        {
            String pkg = StringUtils.join(components.iterator(), String.valueOf(separator));
            StringBuilder testName = new StringBuilder();

            log.debug("classPackage is now: {}", pkg);

            if (!components.isEmpty())
            {
                testName.append(pkg);
                testName.append(separator);
            }

            testName.append((firstRun)
                ? className
                : TemplateService.DEFAULT_NAME);

            log.debug("Looking for {}", testName);
            try
            {
                loader.getAssembler(testName.toString());
                log.debug("Found it, returning {}", testName);
                return testName.toString();
            }
            catch (TurbineException e)
            {
                log.error("Turbine Exception Class mapping", e);
            }
            catch (Exception e)
            {
                // Not found. Go on.
            }

            if (firstRun)
            {
                firstRun = false;
            }
            else
            {
                if (components.isEmpty())
                {
                    break; // for(;;)
                }
                components.remove(componentSize--);
            }
        }

        log.debug("Returning default");
        return getDefaultName(template);
    }