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Hibernate version::3.0.5
Name and version of the database you are using: Oracle 9i

Hi,

I have a very strange exception after loading a table and using one of the fields which is a blob. Blobs in my application are byte[]. So I try to copy/convert the loaded blob (that I have read) to byte[] and then I get the following exception:


java.lang.UnsupportedOperationException: Blob may not be manipulated from creating session

Can somebody help?

Thank you !

Regards,
KP

I do not know why this is the case, but having a look at the source code shows, that the following methods of Hibernate's Blob implementation throw this exception:

public void truncate(long pos)
public byte[] getBytes(long pos, int len)
public int setBytes(long pos, byte[] bytes)
public int setBytes(long pos, byte[] bytes, int i, int j)
public long position(byte[] bytes, long pos)
public OutputStream setBinaryStream(long pos)
public long position(Blob blob, long pos)

Thus, the only way to get the bytes from the Blob seems to be the use of getBinaryStream().

Regards
Guido