Imagine, that user has sent the request with URL:
http://localhost:8080/phones?countryManufactured=China&producer=apple,nokia,samsung&color=white,red
Your task is to implement all PhoneDao methods.
Method findAll() has one input parameter - Map<String, String[]> params. It has following format:
Map<String, String[]> params = new HashMap<>();
params.put("countryManufactured", new String[]{"China"};
params.put("maker", new String[]{"apple", "nokia", "samsung"};
params.put("color", new String[]{"white", "red"};
You need to find all phones that match the specified parameters.