saffron.opt
Class VolcanoCost

java.lang.Object
  |
  +--saffron.opt.VolcanoCost

All Implemented Interfaces:

Cost

class VolcanoCost

extends Object

implements Cost

VolcanoCost represents the cost of a plan node.

This class is immutable: none of the methods (besides set(double, double, double)) modifies any member variables.

Field Summary

(package private) double	dCpu
(package private) double	dIo
(package private) double	dRows
(package private) static VolcanoCost	HUGE
(package private) static VolcanoCost	INFINITY
(package private) static VolcanoCost	TINY
(package private) static VolcanoCost	ZERO

Constructor Summary

(package private)

VolcanoCost(double dRows, double dCpu, double dIo)

Method Summary

boolean	equals(Cost _that)
double	getCpu()
double	getIo()
double	getRows()
boolean	isInfinite()
boolean	isLe(Cost _that)
boolean	isLt(Cost _that)
Cost	minus(Cost _that)
Cost	multiplyBy(double factor)
Cost	plus(Cost _that)
void	set(double dRows, double dCpu, double dIo)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

INFINITY

static final VolcanoCost INFINITY

HUGE

static final VolcanoCost HUGE

ZERO

static final VolcanoCost ZERO

TINY

static final VolcanoCost TINY

dRows

double dRows

dCpu

double dCpu

dIo

double dIo

Constructor Detail

VolcanoCost

VolcanoCost(double dRows,
            double dCpu,
            double dIo)

Method Detail

multiplyBy

public Cost multiplyBy(double factor)

Specified by:

multiplyBy in interface Cost

minus

public Cost minus(Cost _that)

Specified by:

minus in interface Cost

plus

public Cost plus(Cost _that)

Specified by:

plus in interface Cost

equals

public boolean equals(Cost _that)

Specified by:

equals in interface Cost

isLe

public boolean isLe(Cost _that)

Specified by:

isLe in interface Cost

isLt

public boolean isLt(Cost _that)

Specified by:

isLt in interface Cost

isInfinite

public boolean isInfinite()

Specified by:

isInfinite in interface Cost

toString

public String toString()

Specified by:

toString in interface Cost

Overrides:

toString in class Object

getRows

public double getRows()

Specified by:

getRows in interface Cost

getCpu

public double getCpu()

Specified by:

getCpu in interface Cost

getIo

public double getIo()

Specified by:

getIo in interface Cost

set

public void set(double dRows,
                double dCpu,
                double dIo)