Add ByteBuffer constructor at MessageBufferU and MessageBufferBE

Author: miniway

msgpack-core/src/main/java/org/msgpack/core/buffer/MessageBufferBE.java

@@ -15,6 +15,8 @@
 //
 package org.msgpack.core.buffer;
 
+import java.nio.ByteBuffer;
+
 import static org.msgpack.core.Preconditions.checkArgument;
 
 /**
@@ -30,6 +32,11 @@ public class MessageBufferBE
         super(arr, offset, length);
     }
 
+    MessageBufferBE(ByteBuffer bb)
+    {
+        super(bb);
+    }
+
     private MessageBufferBE(Object base, long address, int length)
     {
         super(base, address, length);

msgpack-core/src/main/java/org/msgpack/core/buffer/MessageBufferU.java

@@ -37,6 +37,12 @@ public class MessageBufferU
         this.wrap = bb.slice();
     }
 
+    MessageBufferU(ByteBuffer bb)
+    {
+        super(bb);
+        this.wrap = bb.slice();
+    }
+
     private MessageBufferU(Object base, long address, int length, ByteBuffer wrap)
     {
         super(base, address, length);