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oracle.sql
Class BFILE

java.lang.Object
oracle.sql.Datum
oracle.sql.DatumWithConnection
oracle.sql.BFILE

All Implemented Interfaces:

java.io.Serializable, oracle.jdbc.internal.OracleDatumWithConnection, OracleBfile

public class BFILE

extends DatumWithConnection

implements oracle.jdbc.internal.OracleBfile

A class for Oracle specific data type BFILE.

See Also:

Serialized Form

Field Summary

static int	MAX_CHUNK_SIZE
static int	MODE_READONLY
static int	MODE_READWRITE
static boolean	TRACE

Method Summary

java.io.InputStream	asciiStreamValue() Convert to an ascii stream representation of the datum object
void	close() Close a previously opened external LOB.
void	closeFile() Close the FILE.
boolean	fileExists() Find out if a given BFILE (whose locator) points to a file that actually exists on the server's filesystem.
java.io.InputStream	getBinaryStream() Retrieve the entire BFILE as a stream.
java.io.InputStream	getBinaryStream(long pos) Read from the external LOB as a stream at the requested position.
byte[]	getBytes(long pos, int length) Return a copy of the contents of the BFILE at the requested position.
int	getBytes(long pos, int length, byte[] buf) Copy the contents of the BFILE at the requested position to suppied buffer.
java.lang.String	getDirAlias() Gets the Bfile's directory alias.
java.sql.Connection	getJavaSqlConnection() Oracle extension Return the java.sql.Connection associated with the receiver.
java.lang.String	getName() Gets the Bfile's file name.
boolean	isConvertibleTo(java.lang.Class jClass) Test whether this data object can be converted to the specified Java data type.
boolean	isFileOpen() Find out whether a BFILE was opened with the give BFILE.
boolean	isOpen() Check whether the external LOB is opened.
long	length() The length of the BFILE in bytes.
void	open() Open a external LOB in the readonly mode.
void	open(int mode) Open a external LOB in the indicated mode.
void	open(LargeObjectAccessMode mode) Public method using enum instead of int
void	openFile() Open the FILE.
long	position(BFILE pattern, long start) Determine the byte position at which the given pattern
long	position(byte[] pattern, long start) Determine the byte position at which the given byte pattern
long	position(OracleBfile pattern, long start) Determine the byte position at which the given pattern
java.lang.Object	toJdbc() Convert this data object into its default Java object type.

Methods inherited from class oracle.sql.DatumWithConnection

assertNotNull, assertNotNull, getConnection, getOracleConnection

Methods inherited from class oracle.sql.Datum

bigDecimalValue, booleanValue, byteValue, dateValue, doubleValue, equals, floatValue, getBytes, getLength, getStream, intValue, longValue, setBytes, setShareBytes, shareBytes, stringValue, stringValue, timestampValue, timestampValue, timeValue, timeValue

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface oracle.jdbc.internal.OracleDatumWithConnection

bigDecimalValue, booleanValue, byteValue, dateValue, doubleValue, floatValue, getBytes, getConnection, getInternalConnection, getLength, getOracleConnection, getStream, intValue, longValue, setBytes, setPhysicalConnectionOf, setShareBytes, shareBytes, stringValue, stringValue, timestampValue, timestampValue, timeValue, timeValue

Field Detail

MAX_CHUNK_SIZE

public static final int MAX_CHUNK_SIZE

See Also:

Constant Field Values

MODE_READONLY

public static final int MODE_READONLY

See Also:

Constant Field Values

MODE_READWRITE

public static final int MODE_READWRITE

See Also:

Constant Field Values

TRACE

public static final boolean TRACE

See Also:

Constant Field Values

Method Detail

length

public long length()
            throws java.sql.SQLException

The length of the BFILE in bytes.

Specified by:

length in interface OracleBfile

Returns:

length of the BFILE in bytes

Throws:

java.sql.SQLException

getBytes

public byte[] getBytes(long pos,
                       int length)
                throws java.sql.SQLException

Return a copy of the contents of the BFILE at the requested position.

Specified by:

getBytes in interface OracleBfile

Parameters:

pos - is the first byte of the bfile to be extracted.(1-based)

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

Returns:

a byte array containing a portion of the BFILE

Throws:

java.sql.SQLException

getBytes

public int getBytes(long pos,
                    int length,
                    byte[] buf)
             throws java.sql.SQLException

Copy the contents of the BFILE at the requested position to suppied buffer.

Specified by:

getBytes in interface OracleBfile

Parameters:

pos - is the first byte of the bfile to be extracted. (1-based)

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 BFILE

Throws:

java.sql.SQLException

getBinaryStream

public java.io.InputStream getBinaryStream()
                                    throws java.sql.SQLException

Retrieve the entire BFILE as a stream.

Specified by:

getBinaryStream in interface OracleBfile

Returns:

a stream containing the BFILE data

Throws:

java.sql.SQLException

position

public long position(byte[] pattern,
                     long start)
              throws java.sql.SQLException

Determine the byte position at which the given byte pattern

Specified by:

position in interface OracleBfile

Parameters:

pattern - is the pattern to search for.

start - is the position at which to begin searching. (1-based)

Returns:

the position at which the pattern appears, else -1.

Throws:

java.sql.SQLException

position

public long position(BFILE pattern,
                     long start)
              throws java.sql.SQLException

Determine the byte position at which the given pattern

Parameters:

pattern - is the pattern to search for.

start - is the position at which to begin searching. (1-based)

Returns:

the position at which the pattern appears, else -1.

Throws:

java.sql.SQLException

position

public long position(OracleBfile pattern,
                     long start)
              throws java.sql.SQLException

Determine the byte position at which the given pattern

Specified by:

position in interface OracleBfile

Parameters:

pattern - is the pattern to search for.

start - is the position at which to begin searching. (1-based)

Returns:

the position at which the pattern appears, else -1.

Throws:

java.sql.SQLException

getName

public java.lang.String getName()
                         throws java.sql.SQLException

Gets the Bfile's file name.

Specified by:

getName in interface OracleBfile

Parameters:

bfile - The Bfile for which to get the file name.

Returns:

The file name.

Throws:

java.sql.SQLException

getDirAlias

public java.lang.String getDirAlias()
                             throws java.sql.SQLException

Gets the Bfile's directory alias.

Specified by:

getDirAlias in interface OracleBfile

Parameters:

bfile - The Bfile for which to get the directory alias.

Returns:

The directory alias name.

Throws:

java.sql.SQLException

openFile

public void openFile()
              throws java.sql.SQLException

Open the FILE.

Specified by:

openFile in interface OracleBfile

Parameters:

bfile - The BFILE object to be opened.

Throws:

java.sql.SQLException

isFileOpen

public boolean isFileOpen()
                   throws java.sql.SQLException

Find out whether a BFILE was opened with the give BFILE.

Specified by:

isFileOpen in interface OracleBfile

Parameters:

bfile - The Bfile to be tested.

Returns:

true if the BFILE was opened, false if it was not opened.

Throws:

java.sql.SQLException

fileExists

public boolean fileExists()
                   throws java.sql.SQLException

Find out if a given BFILE (whose locator) points to a file that actually exists on the server's filesystem.

Specified by:

fileExists in interface OracleBfile

Parameters:

bfile - The Bfile to be tested.

Returns:

true if the physical file exists, false if it does not exist.

Throws:

java.sql.SQLException

closeFile

public void closeFile()
               throws java.sql.SQLException

Close the FILE.

Specified by:

closeFile in interface OracleBfile

Parameters:

bfile - The Bfile to be closed.

Throws:

java.sql.SQLException

getBinaryStream

public java.io.InputStream getBinaryStream(long pos)
                                    throws java.sql.SQLException

Read from the external LOB as a stream at the requested position.

Specified by:

getBinaryStream in interface OracleBfile

Parameters:

pos - is the position data to be read.

Returns:

a input stream to read data from the BFILE

Throws:

java.sql.SQLException

Since:

8.2.0

open

public void open()
          throws java.sql.SQLException

Open a external LOB in the readonly mode. It is an error to open the same LOB twice.

Throws:

java.sql.SQLException

Since:

8.2.0

open

public void open(LargeObjectAccessMode mode)
          throws java.sql.SQLException

Public method using enum instead of int

Specified by:

open in interface OracleBfile

Throws:

java.sql.SQLException

open

public void open(int mode)
          throws java.sql.SQLException

Open a external LOB in the indicated mode. Valid modes include MODE_READONLY only. It is an error to open the same LOB twice.

Throws:

java.sql.SQLException

Since:

8.2.0

close

public void close()
           throws java.sql.SQLException

Close a previously opened external LOB.

Specified by:

close in interface OracleBfile

Throws:

java.sql.SQLException

Since:

8.2.0

isOpen

public boolean isOpen()
               throws java.sql.SQLException

Check whether the external LOB is opened.

Specified by:

isOpen in interface OracleBfile

Returns:

true if the LOB is opened.

Throws:

java.sql.SQLException

Since:

8.2.0

toJdbc

public java.lang.Object toJdbc()
                        throws java.sql.SQLException

Convert this data object into its default Java object type.

Specified by:

toJdbc in interface oracle.jdbc.internal.OracleDatumWithConnection

Specified by:

toJdbc in class Datum

Returns:

this object.

Throws:

java.sql.SQLException - if any of the lower layer code throws an exception.

isConvertibleTo

public boolean isConvertibleTo(java.lang.Class jClass)

Test whether this data object can be converted to the specified Java data type.

Specified by:

isConvertibleTo in interface oracle.jdbc.internal.OracleDatumWithConnection

Specified by:

isConvertibleTo in class Datum

Parameters:

jClass - specifies the Java data type to test against.

Returns:

true if this data object is convertible to the specified Java class, and a corresponding xxxValue() method is available; otherwise, a false is returned.

asciiStreamValue

public java.io.InputStream asciiStreamValue()
                                     throws java.sql.SQLException

Convert to an ascii stream representation of the datum object

Specified by:

asciiStreamValue in interface oracle.jdbc.internal.OracleDatumWithConnection

Overrides:

asciiStreamValue in class Datum

Returns:

ascii stream representation of the datum object

Throws:

SQLException, - if no ascii stream representation exists

java.sql.SQLException

getJavaSqlConnection

public java.sql.Connection getJavaSqlConnection()
                                         throws java.sql.SQLException

Description copied from class: DatumWithConnection

Oracle extension Return the java.sql.Connection associated with the receiver. Since 9.0.0 not all Oracle JDBC connection objects are assignment compatible with oracle.jdbc.driver.OracleConnection. If the connection is wrapped, return the outermost wrapper.

Specified by:

getJavaSqlConnection in interface oracle.jdbc.internal.OracleDatumWithConnection

Overrides:

getJavaSqlConnection in class DatumWithConnection

Returns:

the connection

Throws:

java.sql.SQLException - if an error occurs

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