#26 - Java

Roadmap/26 - SOLID SRP/java/Josegs95.java

@@ -0,0 +1,199 @@
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class Josegs95 {
+    public static void main(String[] args) {
+        //Ejercicio
+        //Forma incorrecta
+        IncorrectStudent student1 = new IncorrectStudent(678, "Pepe");
+        student1.addScore(8);
+
+        //Forma correcta
+        CorrectStudent student2 = new CorrectStudent(551, "Rocío");
+        Exam exam1 = new Exam();
+        exam1.addScore(student2, 8.25);
+
+        //Si por ejemplo hay algún problema con un exámen y hay que subir la nota a una
+        //o varios estudiantes, es mucho mas claro y fácil de la forma correcta que la incorrecta
+    }
+
+    public static class IncorrectStudent{
+        private int id;
+        private String name;
+        private List<Double> scoreList;
+
+        public IncorrectStudent(int id, String name) {
+            this.id = id;
+            this.name = name;
+            scoreList = new ArrayList<>();
+        }
+
+        public void addScore(double newScore){
+            scoreList.add(newScore);
+        }
+    }
+
+    public static class CorrectStudent{
+        private int id;
+        private String name;
+
+        public CorrectStudent(int id, String name) {
+            this.id = id;
+            this.name = name;
+        }
+    }
+
+    public static class Exam{
+        private Map<CorrectStudent, Double> scores;
+
+        public Exam(){
+            scores = new HashMap<>();
+        }
+
+        public void addScore(CorrectStudent student, Double score){
+            scores.put(student, score);
+        }
+    }
+
+    //Reto
+    //Si queremos guardar varios datos datos de libros y usuario, debemos crear una
+    //clase para ambos, aunque queramos hacerlo mal aposta.
+
+    public static class IncorrectLibrary {
+
+        private List<Book> bookList;
+        private List<User> userList;
+        private List<Loan> loanList;
+
+        public IncorrectLibrary(){
+            bookList = new ArrayList<>();
+            userList = new ArrayList<>();
+            loanList = new ArrayList<>();
+        }
+
+        public void registerBook(String title, String author, int nCopies){
+            //Código para registrar un libro
+        }
+
+        public void registerUser(Integer id, String name, String email){
+            //Código para registrar un usuario
+        }
+
+        public void lendBook(Integer idUser, String bookName, boolean returnBook){
+            //Código para prestar un libro a un usuario
+        }
+
+        public static void returnBook(Integer idUser, String bookName){
+            //Código para prestar un libro a un usuario
+        }
+    }
+
+    public static class CorrectLibrary{
+        private List<Book> bookList;
+        private List<User> userList;
+        private List<Loan> loanList;
+
+        public CorrectLibrary() {
+            bookList = new ArrayList<>();
+            userList = new ArrayList<>();
+            loanList = new ArrayList<>();
+        }
+
+        public void lendBook(Integer idUser, String bookName){
+            //Código para prestar un libro a un usuario
+        }
+
+        public void returnBook(Integer idUser, String bookName){
+            //Código para que un usuario devuelva un libro
+        }
+
+        public boolean registerUser(Integer id, String name, String email){
+            return userList.add(Register.registerUser(id, name, email));
+        }
+
+        public boolean registerBook(String title, String author, int nCopies){
+            return bookList.add(Register.registerBook(title, author, nCopies));
+        }
+    }
+
+    public static class Register{
+
+        public static Book registerBook(String title, String author, int nCopies){
+            //Código para registrar un libro
+            return null;
+        }
+
+        public static User registerUser(Integer id, String name, String email){
+            //Código para registrar un usuario
+            return null;
+        }
+    }
+
+    public static class Book{
+        private String title;
+        private String author;
+        private Integer nCopies;
+
+        public Book(String title, String author, Integer nCopies) {
+            this.title = title;
+            this.author = author;
+            this.nCopies = nCopies;
+        }
+
+        public String getTitle() {
+            return title;
+        }
+
+        public String getAuthor() {
+            return author;
+        }
+
+        public Integer getnCopies() {
+            return nCopies;
+        }
+    }
+
+    public static class User{
+        private int id;
+        private String name;
+        private String email;
+
+        public User(int id, String name, String email) {
+            this.id = id;
+            this.name = name;
+            this.email = email;
+        }
+
+        public int getId() {
+            return id;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public String getEmail() {
+            return email;
+        }
+    }
+
+    public static class Loan{
+        private User user;
+        private Book book;
+
+        public Loan(User user, Book book) {
+            this.user = user;
+            this.book = book;
+        }
+
+        public User getUser() {
+            return user;
+        }
+
+        public Book getBook() {
+            return book;
+        }
+    }
+}