RequestToJoinEnum contains an int instead of a byte.

Added requestToJoin and joinAcceptance encoding functions to RaceVisionByteEncoder.
Implemented JoinAcceptanceDecoder.
Implemented RequestToJoinDecoder.
Added tests for encoding/decoding RequestToJoin and JoinAcceptance messages.

issue #35
#story[1095]

racevisionGame/src/main/java/network/MessageDecoders/JoinAcceptanceDecoder.java

@@ -0,0 +1,70 @@
+package network.MessageDecoders;
+
+
+import network.Messages.Enums.JoinAcceptanceEnum;
+import network.Messages.JoinAcceptance;
+import network.Utils.ByteConverter;
+
+import java.util.Arrays;
+
+/**
+ * Decoder for {@link JoinAcceptance} messages.
+ */
+public class JoinAcceptanceDecoder {
+
+    /**
+     * The encoded message.
+     */
+    private byte[] encodedMessage;
+
+    /**
+     * The decoded message.
+     */
+    private JoinAcceptance message;
+
+
+    /**
+     * Constructs a decoder to decode a given message.
+     * @param encodedMessage The message to decode.
+     */
+    public JoinAcceptanceDecoder(byte[] encodedMessage) {
+        this.encodedMessage = encodedMessage;
+
+        decode();
+    }
+
+
+    /**
+     * Decodes the contained message.
+     */
+    private void decode() {
+
+        //SourceID is first four bytes.
+        byte[] sourceIdBytes = Arrays.copyOfRange(encodedMessage, 0, 4);
+
+        //Next byte is acceptance type.
+        byte[] acceptanceBytes = Arrays.copyOfRange(encodedMessage, 4, 5);
+
+
+
+        //SourceID is an int.
+        int sourceID = ByteConverter.bytesToInt(sourceIdBytes);
+
+        //Acceptance enum is a byte.
+        JoinAcceptanceEnum acceptanceType = JoinAcceptanceEnum.fromByte(acceptanceBytes[0]);
+
+
+        message = new JoinAcceptance(acceptanceType, sourceID);
+    }
+
+
+    /**
+     * Returns the decoded message.
+     * @return The decoded message.
+     */
+    public JoinAcceptance getMessage() {
+        return message;
+    }
+
+
+}

racevisionGame/src/main/java/network/MessageDecoders/RequestToJoinDecoder.java

@@ -0,0 +1,62 @@
+package network.MessageDecoders;
+
+
+import network.Messages.Enums.RequestToJoinEnum;
+import network.Messages.RequestToJoin;
+import network.Utils.ByteConverter;
+
+import java.util.Arrays;
+
+/**
+ * Decoder for {@link network.Messages.RequestToJoin} messages.
+ */
+public class RequestToJoinDecoder {
+
+    /**
+     * The encoded message.
+     */
+    private byte[] encodedRequest;
+
+    /**
+     * The decoded message.
+     */
+    private RequestToJoin message;
+
+    /**
+     * Constructs a decoder to decode a given message.
+     * @param encodedRequest The message to decode.
+     */
+    public RequestToJoinDecoder(byte[] encodedRequest) {
+        this.encodedRequest = encodedRequest;
+
+        decode();
+    }
+
+
+    /**
+     * Decodes the contained message.
+     */
+    private void decode() {
+
+        //Request type is first four bytes.
+        byte[] requestTypeBytes = Arrays.copyOfRange(encodedRequest, 0, 4);
+
+        //Request type is an integral type.
+        int requestTypeInt = ByteConverter.bytesToInt(requestTypeBytes);
+        RequestToJoinEnum requestType = RequestToJoinEnum.fromInt(requestTypeInt);
+
+
+        message = new RequestToJoin(requestType);
+    }
+
+
+    /**
+     * Returns the decoded message.
+     * @return The decoded message.
+     */
+    public RequestToJoin getMessage() {
+        return message;
+    }
+
+
+}