Move ReasonCode to enum

ethereumj-core/src/main/java/org/ethereum/net/message/DisconnectMessage.java

@@ -4,6 +4,7 @@ import org.ethereum.net.rlp.RLPItem;
 import org.ethereum.net.rlp.RLPList;
 import org.ethereum.net.Command;
 import static org.ethereum.net.Command.DISCONNECT;
+import static org.ethereum.net.message.ReasonCode.DISCONNECT_REQUESTED;
 
 /**
  * www.ethereumJ.com
@@ -12,17 +13,7 @@ import static org.ethereum.net.Command.DISCONNECT;
  */
 public class DisconnectMessage extends Message {
 
-    private byte reason;
+    private ReasonCode reason;
-
-    public static byte REASON_DISCONNECT_REQUESTED  = 0x00;
-    public static byte REASON_TCP_ERROR             = 0x01;
-    public static byte REASON_BAD_PROTOCOL          = 0x02;
-    public static byte REASON_USELESS_PEER          = 0x03;
-    public static byte REASON_TOO_MANY_PEERS        = 0x04;
-    public static byte REASON_ALREADY_CONNECTED     = 0x05;
-    public static byte REASON_WRONG_GENESIS         = 0x06;
-    public static byte REASON_INCOMPATIBLE_PROTOCOL = 0x07;
-    public static byte REASON_PEER_QUITING          = 0x08;
 
     public DisconnectMessage(RLPList rawData) {
         super(rawData);
@@ -39,9 +30,9 @@ public class DisconnectMessage extends Message {
 
         byte[] reasonB = ((RLPItem)paramsList.getElement(1)).getData();
         if (reasonB == null){
-            this.reason = 0;
+            this.reason = DISCONNECT_REQUESTED;
         } else {
-            this.reason = reasonB[0];
+            this.reason = ReasonCode.fromInt(reasonB[0]);
         }
         this.parsed = true;
         // todo: what to do when mal data ?
@@ -52,7 +43,7 @@ public class DisconnectMessage extends Message {
         return null;
     }
 
-    public byte getReason() {
+    public ReasonCode getReason() {
         if (!parsed) parseRLP();
         return reason;
     }

ethereumj-core/src/main/java/org/ethereum/net/message/ReasonCode.java

@@ -0,0 +1,42 @@
+package org.ethereum.net.message;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public enum ReasonCode {
+
+    DISCONNECT_REQUESTED(0x00),
+    TCP_ERROR(0x01),
+    BAD_PROTOCOL(0x02),
+    USELESS_PEER(0x03),
+    TOO_MANY_PEERS(0x04),
+    ALREADY_CONNECTED(0x05),
+    WRONG_GENESIS(0x06),
+    INCOMPATIBLE_PROTOCOL(0x07),
+    PEER_QUITING(0x08),
+    UNKNOWN(0xFF);
+
+    private int reason;
+    
+    private static final Map<Integer, ReasonCode> intToTypeMap = new HashMap<Integer, ReasonCode>();
+    static {
+        for (ReasonCode type : ReasonCode.values()) {
+            intToTypeMap.put(type.reason, type);
+        }
+    }
+    
+    private ReasonCode(int cmd) {
+        this.reason = cmd;
+    }
+
+    public static ReasonCode fromInt(int i) {
+    	ReasonCode type = intToTypeMap.get(Integer.valueOf(i));
+        if (type == null) 
+            return ReasonCode.UNKNOWN;
+        return type;
+    }
+    
+    public byte asByte() {
+    	return (byte) reason;
+    }
+}

ethereumj-core/src/test/java/org/ethereum/net/MessagesTest.java

@@ -11,6 +11,7 @@ import org.ethereum.net.message.GetChainMessage;
 import org.ethereum.net.message.HelloMessage;
 import org.ethereum.net.message.NotInChainMessage;
 import org.ethereum.net.message.PeersMessage;
+import org.ethereum.net.message.ReasonCode;
 import org.ethereum.net.message.TransactionsMessage;
 import org.ethereum.net.rlp.RLP;
 import org.ethereum.net.rlp.RLPList;
@@ -90,8 +91,7 @@ public class MessagesTest {
         DisconnectMessage disconnectMessage = new DisconnectMessage(rlpList);
         System.out.println(disconnectMessage);
 
-        assertEquals(disconnectMessage.getReason(),
+        assertEquals(disconnectMessage.getReason(), ReasonCode.DISCONNECT_REQUESTED);
-                DisconnectMessage.REASON_DISCONNECT_REQUESTED);
     }
 
     @Test /* DisconnectMessage 2 */
@@ -105,8 +105,7 @@ public class MessagesTest {
         DisconnectMessage disconnectMessage = new DisconnectMessage(rlpList);
         System.out.println(disconnectMessage);
 
-        assertEquals(disconnectMessage.getReason(),
+        assertEquals(disconnectMessage.getReason(), ReasonCode.TCP_ERROR);
-                DisconnectMessage.REASON_TCP_ERROR);
     }
 
     /* PEERS */