simplify DisconnectReason enum

src/main/java/net/schmizz/sshj/common/DisconnectReason.java

@@ -18,39 +18,32 @@ package net.schmizz.sshj.common;
 /** Disconnect error codes */
 public enum DisconnectReason {
 
-    UNKNOWN(0),
-    HOST_NOT_ALLOWED_TO_CONNECT(1),
-    PROTOCOL_ERROR(2),
-    KEY_EXCHANGE_FAILED(3),
-    HOST_AUTHENTICATION_FAILED(4),
-    RESERVED(4),
-    MAC_ERROR(5),
-    COMPRESSION_ERROR(6),
-    SERVICE_NOT_AVAILABLE(7),
-    PROTOCOL_VERSION_NOT_SUPPORTED(8),
-    HOST_KEY_NOT_VERIFIABLE(9),
-    CONNECTION_LOST(10),
-    BY_APPLICATION(11),
-    TOO_MANY_CONNECTIONS(12),
-    AUTH_CANCELLED_BY_USER(13),
-    NO_MORE_AUTH_METHODS_AVAILABLE(14),
-    ILLEGAL_USER_NAME(15);
+    UNKNOWN,
+    HOST_NOT_ALLOWED_TO_CONNECT,
+    PROTOCOL_ERROR,
+    KEY_EXCHANGE_FAILED,
+    RESERVED,
+    MAC_ERROR,
+    COMPRESSION_ERROR,
+    SERVICE_NOT_AVAILABLE,
+    PROTOCOL_VERSION_NOT_SUPPORTED,
+    HOST_KEY_NOT_VERIFIABLE,
+    CONNECTION_LOST,
+    BY_APPLICATION,
+    TOO_MANY_CONNECTIONS,
+    AUTH_CANCELLED_BY_USER,
+    NO_MORE_AUTH_METHODS_AVAILABLE,
+    ILLEGAL_USER_NAME;
 
     public static DisconnectReason fromInt(int code) {
-        for (DisconnectReason dc : values())
-            if (dc.code == code)
-                return dc;
-        return UNKNOWN;
-    }
-
-    private final int code;
-
-    private DisconnectReason(int code) {
-        this.code = code;
+        final int len = values().length;
+        if (code < 0 || code > len)
+            return UNKNOWN;
+        return values()[code];
     }
 
     public int toInt() {
-        return code;
+        return ordinal();
     }
 
 }