dubbo-plugin/dubbo-filter-validation/src/main/java/org/apache/dubbo/validation/support/jvalidation/JValidator.java [272:310]:
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    public void validate(String methodName, Class<?>[] parameterTypes, Object[] arguments) throws Exception {
        List<Class<?>> groups = new ArrayList<>();
        Class<?> methodClass = methodClass(methodName);
        if (methodClass != null) {
            groups.add(methodClass);
        }

        Method method = clazz.getMethod(methodName, parameterTypes);
        Class<?>[] methodClasses;
        if (method.isAnnotationPresent(MethodValidated.class)) {
            methodClasses = method.getAnnotation(MethodValidated.class).value();
            groups.addAll(Arrays.asList(methodClasses));
        }
        // add into default group
        groups.add(0, Default.class);
        groups.add(1, clazz);

        // convert list to array
        Class<?>[] classGroups = groups.toArray(new Class[0]);

        Set<ConstraintViolation<?>> violations = new HashSet<>();
        Object parameterBean = getMethodParameterBean(clazz, method, arguments);
        if (parameterBean != null) {
            violations.addAll(validator.validate(parameterBean, classGroups));
        }

        for (Object arg : arguments) {
            validate(violations, arg, classGroups);
        }

        if (!violations.isEmpty()) {
            logger.info("Failed to validate service: " + clazz.getName() + ", method: " + methodName + ", cause: "
                    + violations);
            throw new ConstraintViolationException(
                    "Failed to validate service: " + clazz.getName() + ", method: " + methodName + ", cause: "
                            + violations,
                    violations);
        }
    }
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dubbo-plugin/dubbo-filter-validation/src/main/java/org/apache/dubbo/validation/support/jvalidation/JValidatorNew.java [272:310]:
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    public void validate(String methodName, Class<?>[] parameterTypes, Object[] arguments) throws Exception {
        List<Class<?>> groups = new ArrayList<>();
        Class<?> methodClass = methodClass(methodName);
        if (methodClass != null) {
            groups.add(methodClass);
        }

        Method method = clazz.getMethod(methodName, parameterTypes);
        Class<?>[] methodClasses;
        if (method.isAnnotationPresent(MethodValidated.class)) {
            methodClasses = method.getAnnotation(MethodValidated.class).value();
            groups.addAll(Arrays.asList(methodClasses));
        }
        // add into default group
        groups.add(0, Default.class);
        groups.add(1, clazz);

        // convert list to array
        Class<?>[] classGroups = groups.toArray(new Class[0]);

        Set<ConstraintViolation<?>> violations = new HashSet<>();
        Object parameterBean = getMethodParameterBean(clazz, method, arguments);
        if (parameterBean != null) {
            violations.addAll(validator.validate(parameterBean, classGroups));
        }

        for (Object arg : arguments) {
            validate(violations, arg, classGroups);
        }

        if (!violations.isEmpty()) {
            logger.info("Failed to validate service: " + clazz.getName() + ", method: " + methodName + ", cause: "
                    + violations);
            throw new ConstraintViolationException(
                    "Failed to validate service: " + clazz.getName() + ", method: " + methodName + ", cause: "
                            + violations,
                    violations);
        }
    }
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