Added Race Status messages to the mock streaming data interface

Tags: #story[29]

src/main/java/seng302/server/messages/BoatSubMessage.java

@@ -0,0 +1,91 @@
+package seng302.server.messages;
+
+import java.nio.ByteBuffer;
+
+/**
+ * The status of each boat, sent within a race status message
+ */
+public class BoatSubMessage {
+    private final int MESSAGE_SIZE = 20;
+
+    private long sourceId;
+    private BoatStatus boatStatus;
+    private long legNumber;
+    private long numberPenaltiesAwarded;
+    private long numberPenaltiesServed;
+    private long estimatedTimeAtNextMark;
+    private long estimatedTimeAtFinish;
+
+    /**
+     * Boat Sub message from section 4.2 of the AC35 streaming data interface spec
+     * @param sourceId The source ID of the boat
+     * @param boatStatus The boats status
+     * @param legNumber The leg the boat is on (0= prestart, 1=start to first mark etc)
+     * @param numberPenaltiesAwarded The number of penalties awarded to the boat
+     * @param numberPenaltiesServed The number of penalties served to the boat
+     * @param estimatedTimeAtFinish The estimated time (UTC) the boat will finish the race
+     * @param estimatedTimeAtNextMark The estimated time (UTC) the boat will arrive at the next mark
+     */
+    public BoatSubMessage(long sourceId, BoatStatus boatStatus, long legNumber, long numberPenaltiesAwarded, long numberPenaltiesServed,
+                   long estimatedTimeAtFinish, long estimatedTimeAtNextMark){
+        this.sourceId = sourceId;
+        this.boatStatus = boatStatus;
+        this.legNumber = legNumber;
+        this.numberPenaltiesAwarded = numberPenaltiesAwarded;
+        this.numberPenaltiesServed = numberPenaltiesServed;
+        this.estimatedTimeAtFinish = estimatedTimeAtFinish;
+        this.estimatedTimeAtNextMark = estimatedTimeAtNextMark;
+    }
+
+    /**
+     * @return The size of this message in bytes
+     */
+    public int getSize(){
+        return MESSAGE_SIZE;
+    }
+
+    /**
+     * @return a ByteBuffer containing this boat status message
+     */
+    public ByteBuffer getByteBuffer(){
+        ByteBuffer buff = ByteBuffer.allocate(getSize());
+        int buffPos = 0;
+
+        // Source ID, 4 bytes
+        buff.put(ByteBuffer.allocate(4).putInt((int) sourceId).array());
+        buffPos += 4;
+        buff.position(buffPos);
+
+        // Boat Status, 1 byte
+        buff.put(ByteBuffer.allocate(1).put((byte) boatStatus.getCode()).array());
+        buffPos += 1;
+        buff.position(buffPos);
+
+        // Leg number, 1 byte
+        buff.put(ByteBuffer.allocate(1).put((byte) legNumber).array());
+        buffPos += 1;
+        buff.position(buffPos);
+
+        // Number of penalties awarded, 1 byte
+        buff.put(ByteBuffer.allocate(1).put((byte) numberPenaltiesAwarded).array());
+        buffPos += 1;
+        buff.position(buffPos);
+
+        // Number of penalties served, 1 byte
+        buff.put(ByteBuffer.allocate(1).put((byte) numberPenaltiesServed).array());
+        buffPos += 1;
+        buff.position(buffPos);
+
+        // Estimated time at next mark, 6 bytes
+        buff.put(ByteBuffer.allocate(6).putInt((int) estimatedTimeAtNextMark).array());
+        buffPos += 6;
+        buff.position(buffPos);
+
+        // Estimated time at finish, 6 bytes
+        buff.put(ByteBuffer.allocate(6).putInt((int) estimatedTimeAtFinish).array());
+        buffPos += 6;
+        buff.position(buffPos);
+
+        return buff;
+    }
+}