Today the TagWriterImpl and TagReaderImp classes only allow for a few methods to use for reading and writing. This JIRA proposes to allow for users to implement their own Encoder/Decoder classes which can then be provided as arguments. With the changes in https://issues.redhat.com/browse/IPROTO-265 and other changes it is now possible to have the reader and writer create sub readers and writers as well allowing the user full control of allocations.