Re-Arranged a few packages a bit

Added a HashCalculator class

src/kademlia/Kademlia.java

@@ -30,9 +30,9 @@ import kademlia.operation.Operation;
 import kademlia.operation.KadRefreshOperation;
 import kademlia.operation.StoreOperation;
 import kademlia.routing.RoutingTable;
-import kademlia.serializer.JsonDHTSerializer;
-import kademlia.serializer.JsonRoutingTableSerializer;
-import kademlia.serializer.JsonSerializer;
+import kademlia.util.serializer.JsonDHTSerializer;
+import kademlia.util.serializer.JsonRoutingTableSerializer;
+import kademlia.util.serializer.JsonSerializer;
 
 /**
  * The main Kademlia network management class

src/kademlia/dht/DHT.java

@@ -13,8 +13,8 @@ import kademlia.core.KadConfiguration;
 import kademlia.exceptions.ContentExistException;
 import kademlia.exceptions.ContentNotFoundException;
 import kademlia.node.NodeId;
-import kademlia.serializer.JsonSerializer;
-import kademlia.serializer.KadSerializer;
+import kademlia.util.serializer.JsonSerializer;
+import kademlia.util.serializer.KadSerializer;
 
 /**
  * The main Distributed Hash Table class that manages the entire DHT

src/kademlia/message/ContentLookupMessage.java

@@ -5,7 +5,7 @@ import java.io.DataOutputStream;
 import java.io.IOException;
 import kademlia.dht.GetParameter;
 import kademlia.node.Node;
-import kademlia.serializer.JsonSerializer;
+import kademlia.util.serializer.JsonSerializer;
 
 /**
  * Messages used to send to another node requesting content.

src/kademlia/message/ContentMessage.java

@@ -5,7 +5,7 @@ import java.io.DataOutputStream;
 import java.io.IOException;
 import kademlia.dht.StorageEntry;
 import kademlia.node.Node;
-import kademlia.serializer.JsonSerializer;
+import kademlia.util.serializer.JsonSerializer;
 
 /**
  * A Message used to send content between nodes

src/kademlia/message/StoreContentMessage.java

@@ -6,7 +6,7 @@ import java.io.IOException;
 import kademlia.dht.KadContent;
 import kademlia.dht.StorageEntry;
 import kademlia.node.Node;
-import kademlia.serializer.JsonSerializer;
+import kademlia.util.serializer.JsonSerializer;
 
 /**
  * A StoreContentMessage used to send a store message to a node

src/kademlia/util/JsonSerializer.java

@@ -1,47 +0,0 @@
-/**
- * @author Joshua Kissoon
- * @created 20140218
- * @desc Serializes a message into a json message
- */
-package kademlia.util;
-
-import com.google.gson.Gson;
-import com.google.gson.stream.JsonWriter;
-import java.io.IOException;
-import java.io.OutputStream;
-import java.io.OutputStreamWriter;
-import kademlia.message.Message;
-
-public class JsonSerializer
-{
-
-    private final Gson gson;
-
-    public JsonSerializer()
-    {
-        this.gson = new Gson();
-    }
-
-    /**
-     * Writes a message to an output stream
-     *
-     * @param msg The message to write
-     * @param out The output stream to write the message to
-     */
-    public void write(Message msg, OutputStream out)
-    {
-        try (JsonWriter writer = new JsonWriter(new OutputStreamWriter(out)))
-        {
-            writer.beginArray();
-
-            this.gson.toJson(msg, msg.getClass(), writer);
-            
-            writer.endArray();
-        }
-        catch (IOException e)
-        {
-
-        }
-    }
-
-}

src/kademlia/util/hashing/HashCalculator.java

@@ -0,0 +1,26 @@
+package kademlia.util.hashing;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * A class that is used to calculate the hash of strings.
+ *
+ * @author Joshua Kissoon
+ * @since 20140405
+ */
+public class HashCalculator
+{
+
+    public static byte[] sha1Hash(String toHash) throws NoSuchAlgorithmException
+    {
+        /* Create a MessageDigest */
+        MessageDigest md = MessageDigest.getInstance("SHA-1");
+
+        /* Add password bytes to digest */
+        md.update(toHash.getBytes());
+
+        /* Get the hashed bytes */
+        return md.digest();
+    }
+}

src/kademlia/util/serializer/JsonDHTSerializer.java

@@ -1,4 +1,4 @@
-package kademlia.serializer;
+package kademlia.util.serializer;
 
 import com.google.gson.Gson;
 import com.google.gson.reflect.TypeToken;

src/kademlia/util/serializer/JsonRoutingTableSerializer.java

@@ -1,4 +1,4 @@
-package kademlia.serializer;
+package kademlia.util.serializer;
 
 import com.google.gson.Gson;
 import com.google.gson.reflect.TypeToken;

src/kademlia/util/serializer/JsonSerializer.java

@@ -1,4 +1,4 @@
-package kademlia.serializer;
+package kademlia.util.serializer;
 
 import com.google.gson.Gson;
 import com.google.gson.stream.JsonReader;

src/kademlia/util/serializer/KadSerializer.java

@@ -1,4 +1,4 @@
-package kademlia.serializer;
+package kademlia.util.serializer;
 
 import java.io.DataInputStream;
 import java.io.DataOutputStream;