org.xerial.db
Interface Tuple

All Known Implementing Classes:

AbstractTuple, TupleImpl, TupleOnBuffer

public interface Tuple

Tuple interface represents an instance of a Relation.

Author:

leo

Method Summary

int	getByteSize() Gets the byte size of this tuple
Relation	getRelation() Gets the relational schema of this tuple
Object	getValue(int columnIndex) Gets the column value
Object	getValue(String columnName) Gets the column value
int	load(BufferReader reader) Loads the tuple from the buffer
int	save(BufferWriter writer) Saves the tuple to the buffer
void	setValue(int columnIndex, Object value) Sets the tuple value of the specified column
void	setValue(String columnName, Object value) Gets the tuple value of the specified column name

Method Detail

getRelation

Relation getRelation()

Gets the relational schema of this tuple

Returns:

setValue

void setValue(int columnIndex,
              Object value)

Sets the tuple value of the specified column

Parameters:

columnIndex - the column index to which the value is set

value - the column value to set

setValue

void setValue(String columnName,
              Object value)

Gets the tuple value of the specified column name

Parameters:

columnName - the column name to which the value is set

value - the column value to set

getValue

Object getValue(int columnIndex)

Gets the column value

Parameters:

columnIndex - the column index from which the value is read

Returns:

the column value of the specfied column index

getValue

Object getValue(String columnName)

Gets the column value

Parameters:

columnName - the column name from which the value is read

Returns:

the column value of the specfied column name

getByteSize

int getByteSize()

Gets the byte size of this tuple

Returns:

the byte size of this tuple

load

int load(BufferReader reader)

Loads the tuple from the buffer

Parameters:

reader - the BufferReader

Returns:

the byte size read (tuple size)

save

int save(BufferWriter writer)

Saves the tuple to the buffer

Parameters:

writer - the BufferWriter

Returns:

the byte size wrote (tuple size)