>
> >Future plans:
> >
> >Next release: 1.2.1
> >===================
> >* various bugfixes
> >* full support for Clob and Blob
> >
>
> How are you planning on supporting this? Is there going to be some
> internal changes in Hibernate to support them, or are you
> just going to
> add new Blob and Clob types?
There are two parts to this new functionality. Firstly, there is the
existing (in CVS) BlobType and ClobType. (BlobType was created by
Benoit Menendez and this has given me the inspiration for the rest
of the implementation.) The existing functionality lets you retrieve
and manipulate existing Clobs and Blobs (to an extent that varies
depending upon JDBC driver support) but doesn't let you create new
Blobs or Clobs. So what I plan are methods:
Hibernate.createBlob(byte[] bytes)
Hibernate.createClob(String string)
That will let you obtain an instance of java.sql.Clob or
java.sql.Blob that simply wraps a byte array or string. Then
BlobType and ClobType will detect wrapper instances and use
setBytes() / setString() instead of setBlob() / setClob().
By exposing the actual Clob or Blob object to the persistent
class we let you do whatever the JDBC driver will let you do. For
example, in the case of Oracle, you could cast it to OracleBlob.
I think that this is a really nice design. It seems to be efficient
(we never load up the whole Blob or Clob into memory); we can pass
instances of Blob or Clob from one persistent class to another; we
can manipulate the Blob if that is supported by the driver.
What do you think?
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