oracle.streams

Class XStreamUtility

java.lang.Object

oracle.streams.XStreamUtility

public class XStreamUtility
extends java.lang.Object

The XStreamUtility class provides utility methods for using XStream APIs.

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_POS_LENGTH
static int	POS_LENGTH_V1
static int	POS_LENGTH_V2
static int	POS_VERSION_V1
static int	POS_VERSION_V2
static int	SCN_START_V1
static int	SCN_START_V2

Constructor Summary

Constructors

Constructor and Description
XStreamUtility()

Method Summary

Modifier and Type	Method and Description
static byte[]	convertSCNToPosition(oracle.sql.NUMBER scn) Converts the given SCN to a XStream position.
static byte[]	convertSCNToPosition(oracle.sql.NUMBER scn, int version) Converts the given SCN to a XStream position.
static oracle.sql.NUMBER	getCommitSCNFromPosition(byte[] position) Gets the commit system change number (SCN) from a position.
static oracle.sql.NUMBER	getSCNFromPosition(byte[] position) Gets the SCN from a position.

Methods inherited from class java.lang.Object

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

Field Detail

POS_VERSION_V1

public static final int POS_VERSION_V1

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Constant Field Values

POS_VERSION_V2

public static final int POS_VERSION_V2

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Constant Field Values

SCN_START_V1

public static final int SCN_START_V1

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Constant Field Values

SCN_START_V2

public static final int SCN_START_V2

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Constant Field Values

POS_LENGTH_V1

public static final int POS_LENGTH_V1

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Constant Field Values

POS_LENGTH_V2

public static final int POS_LENGTH_V2

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Constant Field Values

MAX_POS_LENGTH

public static final int MAX_POS_LENGTH

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Constant Field Values

Constructor Detail

XStreamUtility

public XStreamUtility()

Method Detail

getSCNFromPosition

public static oracle.sql.NUMBER getSCNFromPosition(byte[] position)
                                            throws StreamsException

Gets the SCN from a position.
This static method gets the SCN portion of an LCR position. This method can only be used for LCRs that contain positions generated by an Oracle database. This method does not support LCRs with user-defined positions.

Parameters:

position - An Oracle-specific XStream position.

Returns:

The SCN portion in the position in the form of oracle.sql.NUMBER

Throws:

StreamsException - if error occurs when retrieving SCN.

getCommitSCNFromPosition

public static oracle.sql.NUMBER getCommitSCNFromPosition(byte[] position)
                                                  throws StreamsException

Gets the commit system change number (SCN) from a position.
This method can only be used for LCRs that contain positions generated by an Oracle database. This method does not support LCRs with user-defined positions.

Parameters:

position - An Oracle-specific XStream position.

Returns:

the Commit SCN portion in the position in the form of oracle.sql.NUMBER

Throws:

StreamsException - if error occurs when retrieving CSCN.

convertSCNToPosition

public static byte[] convertSCNToPosition(oracle.sql.NUMBER scn)
                                   throws StreamsException

Converts the given SCN to a XStream position.

Parameters:

scn - the system change number in the form of oracle.sql.NUMBER.

Returns:

the XStream position in the form of a byte array

Throws:

StreamsException - if error occurs when converting SCN.

convertSCNToPosition

public static byte[] convertSCNToPosition(oracle.sql.NUMBER scn,
                                          int version)
                                   throws StreamsException

Converts the given SCN to a XStream position.

Parameters:

scn - The system change number in the form of oracle.sql.NUMBER.

version - LCR identifier version.

Returns:

The XStream position in the form of a byte array.

Throws:

StreamsException - if error occurs when converting SCN.