if (idx >= 0) {
                    fieldName = fieldName.substring(idx + 1);
                    key = fieldName;
                }

                if (fieldName.endsWith("]")) {
                    key = fieldName.substring(fieldName.lastIndexOf('[') + 1, fieldName.length() - 1);
                    try {
                        key = Integer.valueOf(key.toString());

        try {
            Field field = findField(obj.getClass(), fieldName);
            field.setAccessible(true);
            return field.get(obj);
        } catch (Exception e) {
            throw new RuntimeException("Failed to get field " + fieldName, e);
        }
    }

    private Field findField(Class<?> clazz, String fieldName) throws NoSuchFieldException {
        Class<?> current = clazz;

            SettingsProblemCollector problems, String fieldName, String string, String sourceHint) {
        if (!validateNotNull(problems, fieldName, string, sourceHint)) {
            return false;
        }

        if (!string.isEmpty()) {
            return true;
        }

        addViolation(problems, Severity.ERROR, fieldName, sourceHint, "is missing");

        return false;
    }

                    throw new NoSuchFieldException(fieldName);
                }
                field.setAccessible(true);
                field.set(this, value);
            } catch (Exception e) {
                throw new RuntimeException("Failed to set field " + fieldName, e);
            }
        }

        protected Object getFieldValue(String fieldName) {
            try {
                Field field = null;

            }
        }
        throw new NoSuchFieldException(fieldName);
    }

    private static void setPrivateField(Object target, String fieldName, Object value) throws Exception {
        Class<?> clazz = target.getClass();
        while (clazz != null) {
            try {
                Field f = clazz.getDeclaredField(fieldName);
                f.setAccessible(true);
                f.set(target, value);

    /** The {@link BeanDesc} of the class that owns this field */
    protected final BeanDesc beanDesc;

    /** The field */
    protected final Field field;

    /** The field name */
    protected final String fieldName;

    /** The type of the field */
    protected final Class<?> fieldType;

    /** Information about the parameterized type */
    protected final ParameterizedClassDesc parameterizedClassDesc;

    /**

        }
        elementsAll.put(fieldName, newArray);
        elementsText.put(fieldName, newArray);
    }

    protected void addFileParameter(final DiskFileItem item) {
        final String fieldName = item.getFieldName();
        final MultipartFormFile formFile = newActionMultipartFormFile(item);
        elementsAll.put(fieldName, formFile);
        elementsFile.put(fieldName, formFile);
    }

    // Helper methods

    private Object getFieldValue(Object obj, String fieldName) {
        try {
            Field field = getField(obj.getClass(), fieldName);
            field.setAccessible(true);
            return field.get(obj);
        } catch (Exception e) {
            throw new RuntimeException("Failed to get field value: " + fieldName, e);
        }
    }

     * Searches the class hierarchy to find the field.
     */
    private Object getField(Object obj, String fieldName) throws Exception {
        Class<?> clazz = obj.getClass();
        while (clazz != null) {
            try {
                java.lang.reflect.Field field = clazz.getDeclaredField(fieldName);
                field.setAccessible(true);
                return field.get(obj);

            log.warn("{} exceeds maximum length: {} > {}", fieldName, str.length(), maxLength);
            throw new SmbException(fieldName + " exceeds maximum length: " + str.length());
        }

        // Check for null bytes
        if (str.indexOf('\0') != -1) {
            failedValidations.incrementAndGet();
            log.warn("{} contains null bytes", fieldName);