read

Description:

public virtual long read (Blob blob, long offset, long size)

Reads a chunk of bytes from the BLOB accessible through this into blob.

this	a BlobOp
blob	a Blob to read data to
offset	offset to read from the start of the blob (starts at 0)
size	maximum number of bytes to read.

the number of bytes actually read. In case of error, -1 is returned and the provider should have added an error to the connection.