hpack works with direct buffers

gistfile1.txt

diff --git a/jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/Huffman.java b/jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/Huffman.java
index ddb2c4a97d..438a5a7267 100644
--- a/jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/Huffman.java
+++ b/jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/Huffman.java
@@ -357,16 +357,16 @@ public class Huffman
         int current = 0;
         int bits = 0;
 
-        byte[] array = buffer.array();
+        byte[] array = buffer.hasArray()?buffer.array():null;
         int position=buffer.position();
-        int start=buffer.arrayOffset()+position;
+        int start=(buffer.hasArray()?buffer.arrayOffset():0)+position;
         int end=start+length;
         buffer.position(position+length);
 
 
         for (int i=start; i<end; i++)
         {
-            int b = array[i]&0xFF;
+            int b = (array==null?buffer.get(i):array[i])&0xFF;
             current = (current << 8) | b;
             bits += 8;
             while (bits >= 8) 
@@ -461,8 +461,8 @@ public class Huffman
         long current = 0;
         int n = 0;
 
-        byte[] array = buffer.array();
-        int p=buffer.arrayOffset()+buffer.position();
+        byte[] array = buffer.hasArray()?buffer.array():null;
+        int p=(buffer.hasArray()?buffer.arrayOffset():0)+buffer.position();
 
         int len = s.length();
         for (int i=0;i<len;i++)
@@ -480,18 +480,24 @@ public class Huffman
             while (n >= 8) 
             {
                 n -= 8;
-                array[p++]=(byte)(current >> n);
+                if (array==null)
+                    buffer.put(p++,(byte)(current >> n));
+                else
+                    array[p++]=(byte)(current >> n);
             }
         }
 
-        if (n > 0) 
+        if (n > 0)
         {
-          current <<= (8 - n);
-          current |= (0xFF >>> n); 
-          array[p++]=(byte)current;
+            current <<= (8 - n);
+            current |= (0xFF >>> n);
+            if (array==null)
+                buffer.put(p++,(byte)(current));
+            else
+                array[p++]=(byte)(current);
         }
-        
-        buffer.position(p-buffer.arrayOffset());
+
+        buffer.position(p-(buffer.hasArray()?buffer.arrayOffset():0));
     }
 
 }
diff --git a/jetty-http2/http2-hpack/src/test/java/org/eclipse/jetty/http2/hpack/HpackTest.java b/jetty-http2/http2-hpack/src/test/java/org/eclipse/jetty/http2/hpack/HpackTest.java
index 355ffb2953..29a99dca5a 100644
--- a/jetty-http2/http2-hpack/src/test/java/org/eclipse/jetty/http2/hpack/HpackTest.java
+++ b/jetty-http2/http2-hpack/src/test/java/org/eclipse/jetty/http2/hpack/HpackTest.java
@@ -51,7 +51,7 @@ public class HpackTest
     {
         HpackEncoder encoder = new HpackEncoder();
         HpackDecoder decoder = new HpackDecoder(4096,8192);
-        ByteBuffer buffer = BufferUtil.allocate(16*1024);
+        ByteBuffer buffer = BufferUtil.allocateDirect(16*1024);
         
         HttpFields fields0 = new HttpFields();
         fields0.add(HttpHeader.CONTENT_TYPE,"text/html");