src/main/java/org/jboss/util/propertyeditor/ByteArrayEditor.java
public void setAsText(final String text)
   {
      if (PropertyEditors.isNull(text, false, false))
      {
         setValue(null);
         return;
      }
      Object newValue = text.getBytes();
      setValue(newValue);
   }
public void setAsText(final String text)
   {
      if (PropertyEditors.isNull(text, false, false))
      {
         setValue(null);
         return;
      }
      Object newValue = text.getBytes();
      setValue(newValue);
   }
Map the argument text into and Byte using Byte.decode.