TestNG counter of DataProvider rows

gistfile1.java

    @Override
    public void onTestStart(ITestResult iTestResult) {
        // Attempt to count invocations of a DataProvider-instrumented test
        Object instance = iTestResult.getInstance();
        ITestNGMethod testNGMethod = iTestResult.getMethod();
        Method testMethod = testNGMethod.getMethod();
        if (testMethod.isAnnotationPresent(Test.class) && testMethod.isAnnotationPresent(Count.class)) {
            Test testMethodTestAnnotation = testMethod.getAnnotation(Test.class);
            String dataProviderName = testMethodTestAnnotation.dataProvider();
            if (dataProviderName != null && !dataProviderName.isEmpty()) {
                Class<?> aClass = instance.getClass();
                Method[] allTestClassMethods = aClass.getMethods();
                for (Method m : allTestClassMethods) {
                    /*
                    Counting will silently fail for Test classes using a DataProvider defined outside the test class instance itself.
                    The reason is that the following code does not look outside the test class instance for the DataProvider method.
                     */
                    if (m.isAnnotationPresent(DataProvider.class)) {
                        DataProvider dataProviderAnnotation = m.getAnnotation(DataProvider.class);
                        String thisDataProviderName = dataProviderAnnotation.name();
                        if (dataProviderName.equals(thisDataProviderName)) {
                            try {
                                Object[][] theData = (Object[][]) m.invoke(instance);
                                Integer numberOfDataProviderRows = theData.length;
                                System.out.printf("Executing %s %d / %d\n", iTestResult.getName(), testNGMethod.getCurrentInvocationCount() + 1, numberOfDataProviderRows);
                            } catch (IllegalAccessException e) {
                                e.printStackTrace();
                            } catch (InvocationTargetException e) {
                                e.printStackTrace();
                            }
                        }
                    }
                }
            }
        }
    }

Line 23 :
Object[][] theData = (Object[][]) m.invoke(instance);
is incredible.
Thanks.