Ensure HeapBytesStore has final fields for correct visibility, https://github.com/OpenHFT/Chronicle-Wire/issues/137

src/main/java/net/openhft/chronicle/hash/serialization/impl/ByteArrayDataAccess.java

@@ -43,7 +43,7 @@ public class ByteArrayDataAccess extends AbstractData<byte[]> implements DataAcc
     }
 
     private void initTransients() {
-        bs = HeapBytesStore.uninitialized();
+        bs = null;
     }
 
     @Override
@@ -77,14 +77,14 @@ public class ByteArrayDataAccess extends AbstractData<byte[]> implements DataAcc
     @Override
     public Data<byte[]> getData(@NotNull byte[] instance) {
         array = instance;
-        bs.init(instance);
+        bs = HeapBytesStore.wrap(array);
         return this;
     }
 
     @Override
     public void uninit() {
         array = null;
-        bs.uninit();
+        bs = null;
     }
 
     @Override

src/main/java/net/openhft/chronicle/hash/serialization/impl/ByteBufferDataAccess.java

@@ -32,7 +32,6 @@ public class ByteBufferDataAccess extends AbstractData<ByteBuffer>
         implements DataAccess<ByteBuffer> {
 
     // Cache fields
-    private transient HeapBytesStore heapBytesStore;
     private transient NativeBytesStore nativeBytesStore;
     private transient VanillaBytes<Void> bytes;
 
@@ -45,7 +44,6 @@ public class ByteBufferDataAccess extends AbstractData<ByteBuffer>
     }
 
     private void initTransients() {
-        heapBytesStore = HeapBytesStore.uninitialized();
         nativeBytesStore = NativeBytesStore.uninitialized();
         bytes = VanillaBytes.vanillaBytes();
     }
@@ -91,8 +89,7 @@ public class ByteBufferDataAccess extends AbstractData<ByteBuffer>
             nativeBytesStore.init(instance, false);
             bytesStore = nativeBytesStore;
         } else {
-            heapBytesStore.init(instance);
-            bytesStore = heapBytesStore;
+            bytesStore = HeapBytesStore.wrap(instance);
         }
         return this;
     }
@@ -102,8 +99,6 @@ public class ByteBufferDataAccess extends AbstractData<ByteBuffer>
         bb = null;
         if (bytesStore == nativeBytesStore) {
             nativeBytesStore.uninit();
-        } else {
-            heapBytesStore.uninit();
         }
     }
 

src/main/java/net/openhft/chronicle/map/impl/stage/data/ZeroBytesStore.java

@@ -29,7 +29,12 @@ public enum ZeroBytesStore implements BytesStore<ZeroBytesStore, Void> {
 
     @Override
     public long addressForWrite(long offset) throws UnsupportedOperationException, BufferOverflowException {
-        throw new UnsupportedOperationException("todo");
+        throw new UnsupportedOperationException("Cannot get the address of nothing");
+    }
+
+    @Override
+    public long addressForWritePosition() throws UnsupportedOperationException, BufferOverflowException {
+        throw new UnsupportedOperationException("Cannot get the address of nothing");
     }
 
     @Override