Made contacts

src/io/github/norbipeti/chat/server/Main.java

@@ -5,6 +5,9 @@ import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.util.Set;
 
+import javax.persistence.EntityManager;
+
+import org.hibernate.Hibernate;
 import org.reflections.Reflections;
 import org.reflections.scanners.SubTypesScanner;
 import org.reflections.util.ClasspathHelper;
@@ -28,8 +31,10 @@ public class Main {
 			try (DataProvider provider = new DataProvider()) {
 				User user = new User();
 				provider.addUser(user);
-				System.out.println(provider.getUsers());
-				provider.removeUser(user);
+				User user2 = new User();
+				user2.setName("Teszt");
+				user2.getContacts().add(user.getId());
+				provider.addUser(user2);
 				System.out.println(provider.getUsers());
 			}
 			System.out.println("Starting webserver...");

src/io/github/norbipeti/chat/server/db/DataProvider.java

@@ -36,6 +36,14 @@ public class DataProvider implements AutoCloseable {
 		return users;
 	}
 
+	public List<User> getUser(Long id) { //TODO
+		EntityManager em = emf.createEntityManager();
+		TypedQuery<User> query = em.createQuery("SELECT u FROM User u", User.class);
+		List<User> users = query.getResultList();
+		em.close();
+		return users;
+	}
+
 	public void removeUser(User user) {
 		EntityManager em = emf.createEntityManager();
 		em.getTransaction().begin();
@@ -45,6 +53,17 @@ public class DataProvider implements AutoCloseable {
 		em.close();
 	}
 
+	public EntityManager startTransaction() {
+		EntityManager em = emf.createEntityManager();
+		em.getTransaction().begin();
+		return em;
+	}
+
+	public void endTransaction(EntityManager em) {
+		em.getTransaction().commit();
+		em.close();
+	}
+
 	@Override
 	public void close() {
 		if (emf != null)

src/io/github/norbipeti/chat/server/db/domain/Contact.java

@@ -1,38 +0,0 @@
-package io.github.norbipeti.chat.server.db.domain;
-
-import javax.persistence.*;
-
-@Entity
-public class Contact {
-	@ManyToOne
-	private User user1;
-	@ManyToOne
-	private User user2;
-
-	public User getUser1() {
-		return user1;
-	}
-
-	public void setUser1(User user1) {
-		this.user1 = user1;
-	}
-
-	public User getUser2() {
-		return user2;
-	}
-
-	public void setUser2(User user2) {
-		this.user2 = user2;
-	}
-
-	@Id
-	private Long getId() {
-		if (user1 == null)
-			return null;
-		return user1.getId();
-	}
-
-	public Contact() {
-
-	}
-}

src/io/github/norbipeti/chat/server/db/domain/User.java

@@ -1,5 +1,8 @@
 package io.github.norbipeti.chat.server.db.domain;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import javax.persistence.*;
 
 @Entity
@@ -12,6 +15,18 @@ public class User {
 	private String name;
 	private String email;
 	private String password;
+	@ElementCollection(fetch = FetchType.EAGER)
+	private List<Long> contacts;
+
+	public List<Long> getContacts() {
+		if (contacts == null)
+			contacts = new ArrayList<>();
+		return contacts;
+	}
+
+	public void setContacts(List<Long> contacts) {
+		this.contacts = contacts;
+	}
 
 	public String getName() {
 		return name;
@@ -27,7 +42,8 @@ public class User {
 
 	@Override
 	public String toString() {
-		return "User [id=" + id + ", name=" + name + ", email=" + email + ", password=" + password + "]";
+		return "User [id=" + id + ", name=" + name + ", email=" + email + ", password=" + password + ", contacts="
+				+ contacts + "]";
 	}
 
 	public void setEmail(String email) {