wt.pds
Class DBMSLobHandler

java.lang.Object
  wt.pds.AbstractLobHandler
      wt.pds.ChunkLobHandler
          wt.pds.DBMSLobHandler

All Implemented Interfaces:

LobHandler

Direct Known Subclasses:

DBMSLobHandler81

public class DBMSLobHandler

extends ChunkLobHandler

This abstract class provides common basic Lob handling operations in terms of low level DBMS_LOB package access APIs.

Supported API: false

Extendable: false

Field Summary

private static String	CLASSNAME
private static String	RESOURCE

Fields inherited from class wt.pds.AbstractLobHandler

DEBUG

Constructor Summary

DBMSLobHandler()

Method Summary

InputStream	getLob(WTConnection a_connection, Object a_blob) Gets the data from the specified LOB as an InputStream.
protected long	getLobLength(WTConnection a_connection, Object a_blob) Returns the length of the specified LOB.
protected long	read(WTConnection a_connection, Object a_blob, long a_blobOffset, byte[] a_buffer, int a_bufferOffset, int a_length) Reads the data fromt the specified LOB.
protected void	setLobLength(WTConnection a_connection, Object a_blob, long a_length) Set the length of the specified LOB.
protected void	write(WTConnection a_connection, Object a_blob, long a_blobOffset, InputStream a_inputStream, long a_length) Writes the data to the specified LOB.

Methods inherited from class wt.pds.ChunkLobHandler

setLob, setLob, setObjectAsLob

Methods inherited from class wt.pds.AbstractLobHandler

findLocator, getBlob, getLobAsByteArray, getLobAsObject, setBlob, streamAvailable

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

RESOURCE

private static final String RESOURCE

See Also:

Constant Field Values

CLASSNAME

private static final String CLASSNAME

Constructor Detail

DBMSLobHandler

public DBMSLobHandler()

Method Detail

setLobLength

protected void setLobLength(WTConnection a_connection,
                            Object a_blob,
                            long a_length)
                     throws DatastoreException

Set the length of the specified LOB.

Supported API: false

Specified by:

setLobLength in class ChunkLobHandler

Parameters:

a_connection -

a_blob -

a_length -

Throws:

DatastoreException

getLobLength

protected long getLobLength(WTConnection a_connection,
                            Object a_blob)
                     throws DatastoreException

Returns the length of the specified LOB.

Supported API: false

Specified by:

getLobLength in class ChunkLobHandler

Parameters:

a_connection -

a_blob -

Returns:

long

Throws:

DatastoreException

write

protected void write(WTConnection a_connection,
                     Object a_blob,
                     long a_blobOffset,
                     InputStream a_inputStream,
                     long a_length)
              throws WTIOException

Writes the data to the specified LOB.

Supported API: false

Specified by:

write in class ChunkLobHandler

Parameters:

a_connection - Connection to the database.

a_blob - Blob object reference to the data

a_blobOffset - Offset into the Blob data to begin writing

a_inputStream - Offset into the buffer data to begin writing from

a_length - Number of bytes to write

Throws:

WTIOException

read

protected long read(WTConnection a_connection,
                    Object a_blob,
                    long a_blobOffset,
                    byte[] a_buffer,
                    int a_bufferOffset,
                    int a_length)
             throws WTIOException

Reads the data fromt the specified LOB.

Supported API: false

Parameters:

a_connection - Connection to the database.

a_blob - Blob object reference to the data

a_blobOffset - Offset into the Blob data to begin reading from

a_buffer - Buffer of data to write to

a_bufferOffset - Offset into the buffer data to begin writing

a_length - Number of bytes to read

Returns:

long

Throws:

WTIOException

getLob

public InputStream getLob(WTConnection a_connection,
                          Object a_blob)
                   throws DatastoreException

Gets the data from the specified LOB as an InputStream.

Supported API: false

Specified by:

getLob in interface LobHandler

Overrides:

getLob in class AbstractLobHandler

Parameters:

a_connection - Connection to the database

a_blob - Blob reference to the data

Returns:

InputStream

Throws:

DatastoreException