MappingException:No persister for: net.sf.hibernate.lob.Blob

[springuser]

Hibernate version:
2.1.6

Mapping documents:
<class
name="com.xxx.bean.Email"
table="EMAILS"
dynamic-update="true"
dynamic-insert="true"
>
<id
name="emailId"
type="long"
column="EMAIL_ID"
length="22"
>
<generator class="native"/>
</id>

<property
name="emailattachment"
type="java.lang.Object"
update="false" insert="false" >
<column name="EMAIL_ID" />
<column name="EMAILATTACHMENT"/>
</property>

Code between sessionFactory.openSession() and session.close():
InputStream is = new FileInputStream((File)email.getEmailattachment());
byte[] data = new byte[is.available()];
is.read(data);
is.close();

email.setEmailattachment((Object)Hibernate.createB lob(byte[1]));
getHibernateTemplate().save(o);
getHibernateTemplate().flush();
getHibernateTemplate().refresh(o, LockMode.UPGRADE);
writeBlob(data,(Blob)email.getEmailattachment());

protected final void writeBlob(byte[] data, Blob l_blob) throws Exception {
OutputStream out = ((oracle.sql.BLOB) l_blob).getBinaryOutputStream();
out.write(data);
out.close();
}


Full stack trace of any exception that occurs:
java.lang.RuntimeException: java.lang.RuntimeException: org.springframework.orm.hibernate.HibernateSystemE xception: No persister for: net.sf.hibernate.lob.BlobImpl; nested exception is net.sf.hibernate.MappingException: No persister for: net.sf.hibernate.lob.BlobImpl
Name and version of the database you are using:
Oracle 9

I am trying to cast an java.lang.Object as a Blob and gives me this Exception. Any help is appreciated.

[irbouho]

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