Finished implementing a JsonSerializer to serialize Content

src/kademlia/core/KadServer.java

@@ -119,9 +119,9 @@ public class KadServer
     private void sendMessage(Node to, Message msg, int comm) throws IOException
     {
 
-        final Class<?> clazz = msg.getClass();
+        Class c = msg.getClass();
-        System.out.println(clazz.getSimpleName());
+        System.out.println(c.getSimpleName());
-        System.out.println(clazz);
+        System.out.println(c.getName());
 
 
         /* Setup the message for transmission */

src/kademlia/routing/RoutingTable.java

@@ -39,10 +39,10 @@ public class RoutingTable
     public void insert(Node n)
     {
         /* Find the first set bit: how far this node is away from the contact node */
-        NodeId id = this.localNode.getNodeId().xor(n.getNodeId());        
+        NodeId id = this.localNode.getNodeId().xor(n.getNodeId());
         //System.out.println(" First Bit Set: " + id.getFirstSetBitIndex());
         int bucketId = id.getFirstSetBitIndex();
-        
+
         System.out.println(this.localNode.getNodeId() + " Adding Node " + n.getNodeId() + " to bucket at depth: " + bucketId);
 
         /* Put this contact to the bucket that stores contacts prefixLength distance away */
@@ -79,7 +79,7 @@ public class RoutingTable
         ArrayList<Node> closest = new ArrayList<>(num);
 
         /* Get the bucket number to search for closest from */
-        int bucketNumber = this.localNode.getNodeId().xor(target).getFirstSetBitIndex();
+        int bucketNumber = this.localNode.getNodeId().xor(target).getFirstSetBitIndex() - 1;
 
         /* Add the contacts from this bucket to the return contacts */
         for (Node c : this.buckets[bucketNumber].getNodes())
@@ -162,7 +162,7 @@ public class RoutingTable
         StringBuilder sb = new StringBuilder("\nPrinting Routing Table Started ***************** \n");
         for (KadBucket b : this.buckets)
         {
-           // System.out.println("Bucket: " + b);
+            // System.out.println("Bucket: " + b);
             if (b.numNodes() > 0)
             {
                 sb.append("# nodes in Bucket with depth ");

src/kademlia/serializer/JsonSerializer.java

@@ -1,5 +1,17 @@
 package kademlia.serializer;
 
+import com.google.gson.Gson;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import kademlia.dht.KadContent;
+
 /**
  * A KadContentSerializer that serializes content to JSON format
  *
@@ -9,4 +21,45 @@ package kademlia.serializer;
 public class JsonSerializer implements KadContentSerializer
 {
 
+    private final Gson gson;
+
+    
+    {
+        gson = new Gson();
+    }
+
+    @Override
+    public void write(KadContent content, OutputStream out) throws IOException
+    {
+        try (DataOutputStream dout = new DataOutputStream(out);
+                JsonWriter writer = new JsonWriter(new OutputStreamWriter(out)))
+        {
+            writer.beginArray();
+
+            /* Store the content type */
+            gson.toJson(content.getClass().getName(), String.class, writer);
+
+            /* Now Store the content */
+            gson.toJson(content, content.getClass(), writer);
+
+            writer.endArray();
+        }
+
+    }
+
+    @Override
+    public KadContent read(InputStream in) throws IOException, ClassNotFoundException
+    {
+        try (DataInputStream din = new DataInputStream(in);
+                JsonReader reader = new JsonReader(new InputStreamReader(in)))
+        {
+            reader.beginArray();
+
+            /* Read the class name */
+            String className = gson.fromJson(reader, String.class);
+
+            /* Read and return the Content*/
+            return gson.fromJson(reader, Class.forName(className));
+        }
+    }
 }

src/kademlia/serializer/KadContentSerializer.java

@@ -1,7 +1,8 @@
 package kademlia.serializer;
 
-import java.io.DataInput;
+import java.io.IOException;
-import java.io.DataOutput;
+import java.io.InputStream;
+import java.io.OutputStream;
 import kademlia.dht.KadContent;
 
 /**
@@ -20,8 +21,10 @@ public interface KadContentSerializer
      *
      * @param content The content to write
      * @param out     The output Stream to write to
+     *
+     * @throws java.io.IOException
      */
-    public void write(KadContent content, DataOutput out);
+    public void write(KadContent content, OutputStream out) throws IOException;
 
     /**
      * Read a KadContent from a DataInput Stream
@@ -29,6 +32,9 @@ public interface KadContentSerializer
      * @param in The InputStream to read the data from
      *
      * @return KadContent
+     *
+     * @throws java.io.IOException
+     * @throws java.lang.ClassNotFoundException
      */
-    public KadContent read(DataInput in);
+    public KadContent read(InputStream in) throws IOException, ClassNotFoundException;
 }