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oracle.jdbc
Interface OracleBlob

All Superinterfaces:

Blob

All Known Implementing Classes:

BLOB

public interface OracleBlob

extends Blob

This interface defines the Oracle extensions to the standard JDBC interface Blob .

Generally any new code should avoid the direct use of the class BLOB. For variable declarations use the interface Blob or this interface as required. Instead of the static methods BLOB.createTemporary(java.sql.Connection, boolean, int) and BLOB.empty_lob() please use Connection.createBlob() and BLOB.getEmptyBLOB() respectively.

Since:

11.2.0.3

Method Summary

void	close() Close a previously opened BLOB.
InputStream	getBinaryStream(long pos) Read from the BLOB as a stream at the requested position.
int	getBytes(long pos, int length, byte[] buf) Oracle extension.
boolean	isEmptyLob() Return true if the lob locator points to a empty blob.
boolean	isOpen() Check whether the BLOB is opened.
boolean	isSecureFile() Returns true if this is a SecureFile (LOBs with the STORE AS SECUREFILE option, which were introduced in Oracle Database 11g Release 1).
boolean	isTemporary() Return true if the lob locator points to a temporary blob.
void	open(LargeObjectAccessMode mode) Open a BLOB in the indicated mode.

Methods inherited from interface java.sql.Blob

free, getBinaryStream, getBinaryStream, getBytes, length, position, position, setBinaryStream, setBytes, setBytes, truncate

Method Detail

open

void open(LargeObjectAccessMode mode)
          throws SQLException

Open a BLOB in the indicated mode. Valid modes include MODE_READONLY, and MODE_READWRITE. It is an error to open the same LOB twice.

Throws:

SQLException

Since:

8.2.0

close

void close()
           throws SQLException

Close a previously opened BLOB.

Throws:

SQLException

Since:

8.2.0

isOpen

boolean isOpen()
               throws SQLException

Check whether the BLOB is opened.

Returns:

true if the LOB is opened.

Throws:

SQLException

Since:

8.2.0

getBytes

int getBytes(long pos,
             int length,
             byte[] buf)
             throws SQLException

Oracle extension. Copy the contents of the BLOB at the requested position to the supplied buffer.

Parameters:

pos - is the first byte of the blob to be extracted.

length - is the number of consecutive bytes to be copied.

buf - is the buffer to had the extracted bytes.

Returns:

a byte array containing a portion of the BLOB

Throws:

SQLException

isEmptyLob

boolean isEmptyLob()
                   throws SQLException

Return true if the lob locator points to a empty blob. False if it does not.

Returns:

true if the lob locator points to a empty blob. False if it does not.

Throws:

SQLException

Since:

8.1.7

isSecureFile

boolean isSecureFile()
                     throws SQLException

Returns true if this is a SecureFile (LOBs with the STORE AS SECUREFILE option, which were introduced in Oracle Database 11g Release 1).

Returns:

true if this is a SecureFile and false otherwise.

Throws:

SQLException

getBinaryStream

InputStream getBinaryStream(long pos)
                            throws SQLException

Read from the BLOB as a stream at the requested position.

Parameters:

pos - is the position data to be read.

Returns:

a input stream to read data from the BLOB

Throws:

SQLException

Since:

8.2.0

isTemporary

boolean isTemporary()
                    throws SQLException

Return true if the lob locator points to a temporary blob. False if it does not.

Returns:

true if the lob locator points to a temporary blob. False if it does not.

Throws:

SQLException

Since:

8.2.0

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