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oracle.streams
Class DefaultChunkColumnValue

java.lang.Object
oracle.streams.DefaultColumnValue
oracle.streams.DefaultChunkColumnValue

All Implemented Interfaces:

ChunkColumnValue, ColumnValue

public class DefaultChunkColumnValue

extends DefaultColumnValue

implements ChunkColumnValue

The DefaultChunkColumnValue class provides an Oracle default implementation of the ChunkColumnValue interface.

See Also:

RowLCR

Field Summary

Fields inherited from interface oracle.streams.ChunkColumnValue

BLOB, CLOB, LONG, LONGRAW, NCLOB, XMLTYPE

Fields inherited from interface oracle.streams.ColumnValue

BINARY_DOUBLE, BINARY_FLOAT, CHAR, DATE, INTERVALDS, INTERVALYM, NUMBER, RAW, TIMESTAMP, TIMESTAMPLTZ, TIMESTAMPTZ

Constructor Summary

DefaultChunkColumnValue(java.lang.String columnName, oracle.sql.Datum columnData, int chunkType)
Constructs a DefaultChunkColumnValue object with the column information.

DefaultChunkColumnValue(java.lang.String columnName, oracle.sql.Datum columnData, int chunkType, java.math.BigInteger chunkOffset, java.math.BigInteger chunkOperationSize)
Constructs a DefaultChunkColumnValue object with the column information.

Method Summary

int	getCharSetId() Gets the chunk character set identifier (ID) for an XMLTYPE chunk The character set ID indicates the character set used to interpret the XMLTYPE chunk data.
java.math.BigInteger	getChunkOffset() Gets the chunk operation offset.
java.math.BigInteger	getChunkOperationSize() Gets the chunk operation size.
int	getChunkType() Gets the chunk type.
boolean	isEmptyChunk() Indicates whether the chunk is empty.
boolean	isEndOfRow() Indicates whether the chunk is the end of the entire row change.
boolean	isLastChunk() Indicates whether the chunk is the last one for the column.
boolean	isXMLDiff() Indicates whether the chunk is an XMLDiff.
void	setCharSetId(int charSetId) Sets the character set ID for an XMLTYPE chunk.
void	setChunkOffset(java.math.BigInteger chunkOffset) Sets the chunk operation offset.
void	setChunkOperationSize(java.math.BigInteger chunkOperationSize) Sets the chunk operation size.
void	setChunkType(int chunkType) Sets the chunk type.
void	setColumnData(oracle.sql.Datum columnData) Sets the column data for a ChunkColumnValue.
void	setColumnData(oracle.sql.Datum columnData, int columnDataType) Sets the column data.
void	setEmptyChunk(boolean emptyChunk) Sets the empty chunk flag.
void	setEndOfRow(boolean endOfRow) Sets the endOfRow chunk flag.
void	setLastChunk(boolean lastChunk) Sets the last chunk flag.
void	setXMLDiff(boolean xmlDiff) Sets the XMLDiff flag.
java.lang.String	toString()

Methods inherited from class oracle.streams.DefaultColumnValue

getCharsetId, getColumnData, getColumnDataType, getColumnName, getTDEFlag, is32kData, set32kData, setCharsetId, setColumnName, setTDEFlag

Methods inherited from class java.lang.Object

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

Methods inherited from interface oracle.streams.ColumnValue

getCharsetId, getColumnData, getColumnDataType, getColumnName, getTDEFlag, is32kData, set32kData, setCharsetId, setColumnName, setTDEFlag

Constructor Detail

DefaultChunkColumnValue

public DefaultChunkColumnValue(java.lang.String columnName,
                               oracle.sql.Datum columnData,
                               int chunkType)
                        throws StreamsException

Constructs a DefaultChunkColumnValue object with the column information.

Parameters:

columnName - The column name, cannot be NULL

columnData - The column data, can be NULL. If NULL is used, a valid chunk type must be specified.

chunkType - The chunk type as defined in ChunkColumnValue

Throws:

StreamsException - is thrown if columnName is NULL

DefaultChunkColumnValue

public DefaultChunkColumnValue(java.lang.String columnName,
                               oracle.sql.Datum columnData,
                               int chunkType,
                               java.math.BigInteger chunkOffset,
                               java.math.BigInteger chunkOperationSize)
                        throws StreamsException

Constructs a DefaultChunkColumnValue object with the column information. as well as the offset and size.

Parameters:

columnName - The column name, cannot be NULL

columnData - The column data, can be NULL. If NULL is used, a valid chunk type must be specified.

chunkType - The chunk type as defined in ChunkColumnValue

chunkOffset - The chunk operation offset

chunkOperationSize - The chunk operation size

Throws:

StreamsException - is thrown if chunkType is invalid

Method Detail

getChunkType

public int getChunkType()

Gets the chunk type.
Chunk type indicates the type of the column for which data can be divided into multiple chunks. Valid values are BLOB, CLOB, NCLOB, or XMLTYPE.

Specified by:

getChunkType in interface ChunkColumnValue

Returns:

A integer contains the chunk type as defined in ChunkColumnValue

setChunkType

public void setChunkType(int chunkType)
                  throws StreamsException

Sets the chunk type.
Chunk type is used to specify the type of the column for which data can be divided into mutliple chunks. Valid values are BLOB, CLOB, NCLOB, or XMLTYPE. See chunk type definition in ChunkColumnValue.

Specified by:

setChunkType in interface ChunkColumnValue

Parameters:

chunkType - The chunk type as defined in ChunkColumnValue

Throws:

StreamsException - is thrown if chunk type is unsupported

setColumnData

public void setColumnData(oracle.sql.Datum columnData)

Sets the column data for a ChunkColumnValue.
Column data in a chunk can be an instance of either oracle.sql.CHAR or oracle.sql.RAW.

Parameters:

columnData - The column data, instance of oracle.sql.Datum subclass.

setColumnData

public void setColumnData(oracle.sql.Datum columnData,
                          int columnDataType)
                   throws StreamsException

Sets the column data.
This method overwrites the method defined in parent class ColumnValue.
columnDataType is ignored in this class since the columnDataType can be derived from chunkType if it is a ChunkColumnValue object. The mapping is maintained internally.

Specified by:

setColumnData in interface ColumnValue

Overrides:

setColumnData in class DefaultColumnValue

Parameters:

columnData - The column data, instance of oracle.sql.Datum subclasses.

columnDataType - The column data type as defined in ColumnValue.

Throws:

StreamsException - is thrown if the columnData is NULL and the columnDataType maintained internally is invalid.

getChunkOffset

public java.math.BigInteger getChunkOffset()

Gets the chunk operation offset.
This method is used to obtain the offset information for piecewise LOB operations. For DML operations, NULL is returned.
If there are multiple chunks for one LOB WRITE operation, only the offset of the first chunk is relevant.

Specified by:

getChunkOffset in interface ChunkColumnValue

Returns:

a BigInteger contains the chunk operation offset

getCharSetId

public int getCharSetId()

Gets the chunk character set identifier (ID) for an XMLTYPE chunk
The character set ID indicates the character set used to interpret the XMLTYPE chunk data.
Check oracle.sql.CharacterSet for the definition of Oracle CharacterSet Id.

Specified by:

getCharSetId in interface ChunkColumnValue

Returns:

An integer that indicates the character set

setChunkOffset

public void setChunkOffset(java.math.BigInteger chunkOffset)

Sets the chunk operation offset.
Setting the chunk operation offset is required for a piecwise LOB operation in which the offset indicates the starting point for the LOB operation. The offset value starts at 1.

Specified by:

setChunkOffset in interface ChunkColumnValue

Parameters:

chunkOffset - The chunk operation offset

getChunkOperationSize

public java.math.BigInteger getChunkOperationSize()

Gets the chunk operation size.
Use this method to obtain the size information for piecewise LOB operations. For DML operations, NULL is returned.

Specified by:

getChunkOperationSize in interface ChunkColumnValue

Returns:

A BigInteger contains the chunk operation size

setChunkOperationSize

public void setChunkOperationSize(java.math.BigInteger chunkOperationSize)

Sets the chunk operation size.
Setting the chunk operation size is required for piecewise LOB ERASE and LOB TRIM operations. For LOB ERASE operations, the chunk operation size specifies the amount of data to erase. For LOB TRIM operations, the chunk operation size specified the amount of data to trim.

Specified by:

setChunkOperationSize in interface ChunkColumnValue

Parameters:

chunkOperationSize - The chunk operation size

isLastChunk

public boolean isLastChunk()

Indicates whether the chunk is the last one for the column.

Specified by:

isLastChunk in interface ChunkColumnValue

Returns:

a boolean flag indicates if this is the last chunk

isEmptyChunk

public boolean isEmptyChunk()

Indicates whether the chunk is empty. For a LOB column, an empty LOB is different from a column that contains a NULL.

Specified by:

isEmptyChunk in interface ChunkColumnValue

Returns:

a boolean flag indicates if this is an empty chunk

isXMLDiff

public boolean isXMLDiff()

Indicates whether the chunk is an XMLDiff.

Specified by:

isXMLDiff in interface ChunkColumnValue

Returns:

a boolean flag indicates if this is an XMLDiff

isEndOfRow

public boolean isEndOfRow()

Indicates whether the chunk is the end of the entire row change.
A chunk is the end of the entire row change if it is the last chunk for the last column in an LCR.

Specified by:

isEndOfRow in interface ChunkColumnValue

Returns:

True if this is the end of row change.

setLastChunk

public void setLastChunk(boolean lastChunk)

Sets the last chunk flag.
The last chunk flag indicates whether the chunk is the last one for the current column.

Specified by:

setLastChunk in interface ChunkColumnValue

Parameters:

lastChunk - The last chunk flag

setEmptyChunk

public void setEmptyChunk(boolean emptyChunk)

Sets the empty chunk flag.
The empty chunk flag indicates if the chunk contains an empty LOB. For LOB columns, an empty LOB column is different from a column with a NULL value. Use this method to indicate whether the column contains an empty LOB.

Specified by:

setEmptyChunk in interface ChunkColumnValue

Parameters:

emptyChunk - The empty chunk flag

setXMLDiff

public void setXMLDiff(boolean xmlDiff)

Sets the XMLDiff flag.
The XMLDiff flag indicates if the chunk contains an XMLDiff.

Specified by:

setXMLDiff in interface ChunkColumnValue

Parameters:

xmlDiff - The XMLDiff flag

setEndOfRow

public void setEndOfRow(boolean endOfRow)

Sets the endOfRow chunk flag.
The endOfRow flag indicates whether the chunk is the last one for the last column in an LCR, which also indicates the end of the entire row change.

Specified by:

setEndOfRow in interface ChunkColumnValue

Parameters:

endOfRow - The endOfRow chunk flag

setCharSetId

public void setCharSetId(int charSetId)

Sets the character set ID for an XMLTYPE chunk.
Check oracle.sql.CharacterSet for the definition of Oracle CharacterSet Id.

Specified by:

setCharSetId in interface ChunkColumnValue

Parameters:

charSetId - The character set id

toString

public java.lang.String toString()

Overrides:

toString in class DefaultColumnValue

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