net.sf.farrago.fennel.tuple
Class FennelTupleData

java.lang.Object
  net.sf.farrago.fennel.tuple.FennelTupleData

public class FennelTupleData
extends Object

FennelTupleData is an in-memory collection of independent data values, as explained in the fennel tuple design document. This class is JDK 1.4 compatible.

Field Summary

private List

datums the TupleDatums we are responsible for.

Constructor Summary

FennelTupleData()
default constructor.

FennelTupleData(FennelTupleDescriptor tupleDesc)
creates a FennelTupleData object from a FennelTupleDescriptor.

Method Summary

void	add(FennelTupleDatum d) adds a new FennelTupleDatum object.
void	compute(FennelTupleDescriptor tupleDesc) creates our FennelTupleDatum objects from a FennelTupleDescriptor.
boolean	containsNull() indicates whether this tuple contains any null FennelTupleDatum elements.
FennelTupleDatum	getDatum(int n) obtains a FennelTupleDatum object given the index of an entry.
int	getDatumCount() returns the number of datums we have.

Methods inherited from class java.lang.Object

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

Field Detail

datums

private final List datums

the TupleDatums we are responsible for.

Constructor Detail

FennelTupleData

public FennelTupleData()

default constructor.

FennelTupleData

public FennelTupleData(FennelTupleDescriptor tupleDesc)

creates a FennelTupleData object from a FennelTupleDescriptor.

Method Detail

getDatum

public FennelTupleDatum getDatum(int n)

obtains a FennelTupleDatum object given the index of an entry.

getDatumCount

public int getDatumCount()

returns the number of datums we have.

add

public void add(FennelTupleDatum d)

adds a new FennelTupleDatum object.

compute

public void compute(FennelTupleDescriptor tupleDesc)

creates our FennelTupleDatum objects from a FennelTupleDescriptor.

containsNull

public boolean containsNull()

indicates whether this tuple contains any null FennelTupleDatum elements.