How to retrieve id value from employee map props

john :

Below is the method which accepts a List of Employee objects, I need to pass id value of map obejct, which is inside employee object. I am new to Java8, pls look into below:

class Service {
     void meth(List<Employee> employees){
                employees.stream().flatMap(e -> map = e.getProps())
                .keySet().stream())     
                .filter(s -> s.equals("id"))         
                .allMatch(idValue -> isIdValid(empName, idValue).test(id)); //how to pass empName and  "id" Value here from employee map props object??
        }


      boolean isIdValid(String name, String id){
         //validation of id here
      }
    }


class Employee{
    String name;
    Map<String, Object> props;
}

Employee JSON

{
    "name": "name1",
    "props": {
        "id": "123", //this value has to retreive
        "field2": "hey"
    }
}

I need to pass empName and "id" values in isIdValid method, how pls?

Naman :

You can use the entrySet as:

return employees.stream()
                .flatMap(e -> e.getProps().entrySet().stream())
                .filter(s -> s.getKey().equals("id"))
                .allMatch(e -> isIdValid(idValue).test(e.getValue())); 

---

Edit:- With the updated question , seems like you're looking for

return employees.stream()
        .filter(emp -> emp.getProps().containsKey("id"))
        .allMatch(emp -> isIdValid(emp.getName(),
                (String) emp.getProps().get("id")));