XBlob Interface Reference

is the representation (mapping) of an SQL BLOB. More...

import"XBlob.idl";

Inheritance diagram for XBlob:

Public Member Functions
hyper	length () raises (SQLException)
	returns the number of bytes in the BLOB value designated by this Blob object. More...
sequence< byte >	getBytes ([in]hyper pos, [in]long length) raises (SQLException)
	returns as an array of bytes part or all of the BLOB value that this Blob object designates. More...
com::sun::star::io::XInputStream	getBinaryStream () raises (SQLException)
	retrieves the BLOB designated by this Blob instance as a stream. More...
hyper	position ([in]sequence< byte > pattern, [in]hyper start) raises (SQLException)
	determines the byte position at which the specified byte pattern begins within the BLOB value that this Blob object represents. More...
hyper	positionOfBlob ([in]XBlob pattern, [in] hyper start) raises (SQLException)
	determines the byte position in the BLOB value designated by this Blob object at which pattern begins. More...
Public Member Functions inherited from XInterface
any	queryInterface ([in] type aType)
	queries for a new interface to an existing UNO object. More...
void	acquire ()
	increases the reference counter by one. More...
void	release ()
	decreases the reference counter by one. More...

Detailed Description

is the representation (mapping) of an SQL BLOB.

A SQL BLOB is a built-in type that stores a Binary Large Object as a column value in a row of a database table. The driver implements BLOB using a SQL locator(BLOB) , which means that a Blob object contains a logical pointer to the SQL BLOB data rather than the data itself.
A Blob object is valid for the duration of the transaction in which is was created.

Methods in the interfaces com::sun::star::sdbc::XResultSet , and com::sun::star::sdbc::XPreparedStatement , such as getBlob and setBlob allow a programmer to access the SQL BLOB.
The Blob interface provides methods for getting the length of a SQL BLOB (Binary Large Object) value, for materializing a BLOB value on the client and for determining the position of a pattern of bytes within a BLOB value.

Member Function Documentation

getBinaryStream()

com::sun::star::io::XInputStream getBinaryStream	(		)
raises	(	SQLException
	)

retrieves the BLOB designated by this Blob instance as a stream.

Returns

the stream

Exceptions

SQLException

if a database access error occurs.

getBytes()

sequence<byte> getBytes	(	[in] hyper	pos,
		[in] long	length
	)
raises	(	SQLException
	)

returns as an array of bytes part or all of the BLOB value that this Blob object designates.

The byte array contains up to length consecutive bytes starting at position pos.

Parameters

pos	is the ordinal position of the first byte in the BLOB value to be extracted; the first byte is at position 1.
length	is the number of consecutive bytes to be copied.

Returns

a byte array containing up to length consecutive bytes from the BLOB value designated by this Blob object, starting with the byte at position pos.

Exceptions

SQLException

if there is an error accessing the BLOB.

length()

hyper length	(		)
raises	(	SQLException
	)

returns the number of bytes in the BLOB value designated by this Blob object.

Returns

the length

Exceptions

SQLException

if a database access error occurs.

position()

hyper position	(	[in] sequence< byte >	pattern,
		[in] hyper	start
	)
raises	(	SQLException
	)

determines the byte position at which the specified byte pattern begins within the BLOB value that this Blob object represents.

The search for pattern begins at position start.

Parameters

pattern	the pattern to search
start	the start position for the search

Returns

the position

Exceptions

SQLException

if a database access error occurs.

positionOfBlob()

hyper positionOfBlob	(	[in] XBlob	pattern,
		[in] hyper	start
	)
raises	(	SQLException
	)

determines the byte position in the BLOB value designated by this Blob object at which pattern begins.

The search begins at position start.

Parameters

pattern	the pattern to search
start	position to start

Returns

the position

Exceptions

SQLException

if a database access error occurs.

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The documentation for this interface was generated from the following file:

• com/sun/star/sdbc/XBlob.idl