de.grogra.xl.query
Interface Variable

All Known Implementing Classes:

VMXState.Local

public interface Variable

A Variable represents a query variable of a query. When a query is evaluated, a single Frame is allocated which holds the current values of all query variables, and values are bound to the variable within the frame.

Initially, a query variable is not bound to a value. This is indicated by isSet(de.grogra.xl.query.Frame) returning false. Values are bound via the setter-methods. This includes the method nullset(de.grogra.xl.query.Frame) which sets the variable to a null-value, a feature used by optional patterns without match. A binding is removed by unset(de.grogra.xl.query.Frame).

Author:

Ole Kniemeyer

Method Summary

java.lang.Object	aget(Frame frame)
void	aset(Frame frame, java.lang.Object value)
double	dget(Frame frame)
void	dset(Frame frame, double value)
float	fget(Frame frame)
void	fset(Frame frame, float value)
int	iget(Frame frame)
void	iset(Frame frame, int value)
boolean	isNull(Frame frame)
boolean	isSet(Frame frame)
long	lget(Frame frame)
void	lset(Frame frame, long value)
void	nullset(Frame frame)
void	unset(Frame frame)

Method Detail

aget

java.lang.Object aget(Frame frame)

aset

void aset(Frame frame,
          java.lang.Object value)

dget

double dget(Frame frame)

dset

void dset(Frame frame,
          double value)

fget

float fget(Frame frame)

fset

void fset(Frame frame,
          float value)

iget

int iget(Frame frame)

iset

void iset(Frame frame,
          int value)

isNull

boolean isNull(Frame frame)

isSet

boolean isSet(Frame frame)

lget

long lget(Frame frame)

lset

void lset(Frame frame,
          long value)

nullset

void nullset(Frame frame)

unset

void unset(Frame frame)