final T component = instance == null ? ClassUtil.newInstance(cls) : instance;
            final BeanDesc beanDesc = BeanDescFactory.getBeanDesc(component.getClass());
            for (final FieldDesc fieldDesc : beanDesc.getFieldDescs()) {
                final Resource annotation = fieldDesc.getField().getAnnotation(Resource.class);
                if (annotation != null) {

        return fieldDescCache.getAt(index);
    }

    @Override
    public int getFieldDescSize() {
        return fieldDescCache.size();
    }

    @Override
    public Iterable<FieldDesc> getFieldDescs() {
        return unmodifiableCollection(fieldDescCache.values());
    }

    @Override
    public <T> T newInstance(final Object... args) {