Java Reflection Example

Filter an array by comparing another array

@PatchMapping("/{id}") public Product updateProductFields(@PathVariable int id, @RequestBody Map<String, Object> fields){ retun updateProductByFileds(id, fields); } public Product updateProductByFileds(int id, Map<String, Object> fields){ Product existingProduct = repository.findById(id).get(); fields.forEach((key, value) -> { Field field = ReflectionUtils.findField(Product.class, key); field.setAccessible(true); ReflectionUtils.setFiled(field, existingProduct, value); }); retun repository.save(existingProduct); }