Solve cyclic refs

.gitignore

@@ -3,4 +3,6 @@
 .project
 .classpath
 
+tournament.xml
+tournament.obj
 .DS_Store

src/main/java/cz/jezek/lab11/Oponents.java

@@ -3,7 +3,8 @@ package cz.jezek.lab11;
 import java.io.Serializable;
 import java.util.Objects;
 
-import jakarta.xml.bind.annotation.XmlElement;
+import jakarta.xml.bind.annotation.XmlAttribute;
+import jakarta.xml.bind.annotation.XmlIDREF;
 
 public class Oponents implements Serializable{
 
@@ -12,10 +13,12 @@ public class Oponents implements Serializable{
 	 */
 	private static final long serialVersionUID = 1L;
 	
-	@XmlElement
+	@XmlIDREF
+	@XmlAttribute
 	private Player player1;
 	
-	@XmlElement
+	@XmlIDREF
+	@XmlAttribute
 	private Player player2;
 
 	public Oponents() {

src/main/java/cz/jezek/lab11/Player.java

@@ -2,12 +2,21 @@ package cz.jezek.lab11;
 
 import java.io.Serializable;
 
+import jakarta.xml.bind.annotation.XmlAttribute;
+import jakarta.xml.bind.annotation.XmlID;
+
 public class Player implements Serializable{
 
 	private static final long serialVersionUID = 1L;
 	private String firstName;
 	private String lastName;
-
+	
+	@XmlID
+	@XmlAttribute(name = "id")
+	public String getFullNane () {
+		return toString();
+	}
+	
 	public static Player generateRandom() {
 		return new Player(RandomGenarator.selectRandom(RandomGenarator.NAMES),
 				RandomGenarator.selectRandom(RandomGenarator.SURNAMES));

tournament.xml

-<?xml version="1.0" encoding="UTF-8"?>
-<tournament>
-   <players>
-      <player>
-         <firstName>Jonh</firstName>
-         <lastName>Doe</lastName>
-      </player>
-      <player>
-         <firstName>Marry</firstName>
-         <lastName>Jane</lastName>
-      </player>
-   </players>
-   <matches>
-      <match player1Scorel="0" player2Scorel="0">
-         <oponents>
-            <player1>
-               <firstName>Jonh</firstName>
-               <lastName>Doe</lastName>
-            </player1>
-            <player2>
-               <firstName>Marry</firstName>
-               <lastName>Jane</lastName>
-            </player2>
-         </oponents>
-      </match>
-   </matches>
-</tournament>