2 files changed, 58 insertions, 0 deletions
diff --git a/java/common/src/main/java/org/apache/qpid/transport/codec/BBEncoder.java b/java/common/src/main/java/org/apache/qpid/transport/codec/BBEncoder.java
index 532c19ec18..d18a0f64db 100644
--- a/java/common/src/main/java/org/apache/qpid/transport/codec/BBEncoder.java
+++ b/java/common/src/main/java/org/apache/qpid/transport/codec/BBEncoder.java
@@ -59,12 +59,23 @@ public final class BBEncoder extends AbstractEncoder
         return slice;
     }
 
+    public ByteBuffer buffer()
+    {
+        int pos = out.position();
+        out.position(segment);
+        ByteBuffer slice = out.slice();
+        slice.limit(pos - segment);
+        out.position(pos);
+        return slice;
+    }
+
     private void grow(int size)
     {
         ByteBuffer old = out;
         int capacity = old.capacity();
         out = ByteBuffer.allocate(Math.max(capacity + size, 2*capacity));
         out.order(ByteOrder.BIG_ENDIAN);
+        old.flip();
         out.put(old);
     }
 
diff --git a/java/common/src/test/java/org/apache/qpid/transport/codec/BBEncoderTest.java b/java/common/src/test/java/org/apache/qpid/transport/codec/BBEncoderTest.java
new file mode 100644
index 0000000000..79bf184fe2
--- /dev/null
+++ b/java/common/src/test/java/org/apache/qpid/transport/codec/BBEncoderTest.java
@@ -0,0 +1,47 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+package org.apache.qpid.transport.codec;
+
+import junit.framework.TestCase;
+
+import java.nio.ByteBuffer;
+
+/**
+ * BBEncoderTest
+ *
+ */
+
+public class BBEncoderTest extends TestCase
+{
+
+    public void testGrow()
+    {
+        BBEncoder enc = new BBEncoder(4);
+        enc.writeInt32(0xDEADBEEF);
+        ByteBuffer buf = enc.buffer();
+        assertEquals(0xDEADBEEF, buf.getInt(0));
+        enc.writeInt32(0xBEEFDEAD);
+        buf = enc.buffer();
+        assertEquals(0xDEADBEEF, buf.getInt(0));
+        assertEquals(0xBEEFDEAD, buf.getInt(4));
+    }
+
+}