SingleResponsibilityBreakingNewIdentityCreator.java

package com.blogspot.toomuchcoding.book.chapter8._3_ClassCast;

import static java.util.Arrays.*;

import java.util.List;

import com.blogspot.toomuchcoding.book.chapter8.common.Person;

public class SingleResponsibilityBreakingNewIdentityCreator implements PersonDataUpdater, IdentityCreator {

    public static final String DEFAULT_NEW_NAME = "NewName";

    @Override
    public String createNewName(Person person) {
        System.out.printf("Calling web service and creating new name for person [%s]%n", person.getName());
        return DEFAULT_NEW_NAME;
    }

    @Override
    public int createNewAge(Person person) {
        System.out.printf("Calling db and creating new age for person [%s]%n", person.getName());
        return person.getAge() + 5;
    }

    @Override
    public List<Person> createNewSiblings(Person person) {
        System.out.printf("Making heavy IO operations and creating new siblings for person [%s]%n", person.getName());
        return asList(new Person("Bob"), new Person("Andrew"));
    }

    @Override
    public void updatePersonData(Person person) {
        String json = buildJsonStringToPerformTheUpdate(person);
        System.out.printf("Calling web service to update new identity for person [%s] with JSON String [%s]%n", person.getName(), json);
    }

    private String buildJsonStringToPerformTheUpdate(Person person) {
        return "{\"name\":\""+person.getName()+"\",\"age\":\""+person.getAge()+"\"}";
    }

}