--- a/src/main/java/alice/datasegment/ReceiveData.java	Sun Nov 02 18:10:12 2014 +0900
+++ b/src/main/java/alice/datasegment/ReceiveData.java	Mon Nov 03 13:21:36 2014 +0900
@@ -15,6 +15,7 @@
     // both flag have to be true or false except DataSegment is byteArray;
     private boolean compressed = false;
     private boolean serialized = false;
+    private boolean byteArray = false;
     
     public ReceiveData(Object obj, boolean cFlag, boolean sFlag){
         val = obj;
@@ -22,6 +23,17 @@
         serialized = sFlag;
     }
     
+    public ReceiveData(byte[] obj, boolean cFlag, boolean sFlag){
+        val = obj;
+        byteArray = true;
+        compressed = cFlag;
+        serialized = sFlag;
+    }
+    
+    public boolean isByteArray(){
+        return byteArray;
+    }
+    
     public boolean compressed(){
         return compressed;
     }