org.vanilladb.core.sql

Class VarcharConstantRange

java.lang.Object

org.vanilladb.core.sql.ConstantRange

org.vanilladb.core.sql.VarcharConstantRange

public class VarcharConstantRange
extends ConstantRange

Constructor Summary

Constructors

Constructor and Description
VarcharConstantRange(String low, boolean lowIncl, String high, boolean highIncl) Constructs a new instance.

Method Summary

Modifier and Type	Method and Description
ConstantRange	applyConstant(Constant c)
ConstantRange	applyHigh(Constant c, boolean incl) Returns a new range with high set to the specified constant if doing so makes the upper bound more strict.
ConstantRange	applyLow(Constant c, boolean incl) Returns a new range with low set to the specified constant if doing so makes the lower bound more strict.
Constant	asConstant()
boolean	contains(Constant c)
boolean	contains(ConstantRange r)
boolean	hasLowerBound()
boolean	hasUpperBound()
Constant	high() Returns the higher bound.
ConstantRange	intersect(ConstantRange r)
boolean	isConstant()
boolean	isHighInclusive()
boolean	isLowInclusive()
boolean	isOverlapping(ConstantRange r)
boolean	isValid() Returns whether it is possible to have normal values (e.g., those other than positive and negative infinities, etc.) lying within this range.
boolean	largerThan(Constant c)
double	length()
boolean	lessThan(Constant c)
Constant	low() Returns the lower bound.
ConstantRange	union(ConstantRange r)

Methods inherited from class org.vanilladb.core.sql.ConstantRange

newInstance, newInstance, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

VarcharConstantRange

public VarcharConstantRange(String low,
                            boolean lowIncl,
                            String high,
                            boolean highIncl)

Constructs a new instance.

Parameters:

low - the lower bound. null means unbound.

lowIncl - whether the lower bound is inclusive

high - the higher bound. null means unbound.

highIncl - whether the higher bound is inclusive

Method Detail

isValid

public boolean isValid()

Description copied from class: ConstantRange

Returns whether it is possible to have normal values (e.g., those other than positive and negative infinities, etc.) lying within this range.

Specified by:

isValid in class ConstantRange

Returns:

true if there is possible value

hasLowerBound

public boolean hasLowerBound()

Specified by:

hasLowerBound in class ConstantRange

hasUpperBound

public boolean hasUpperBound()

Specified by:

hasUpperBound in class ConstantRange

low

public Constant low()

Description copied from class: ConstantRange

Returns the lower bound. Note that due to the automatic type conversion, the returned constant may have a type different from that of the constant passed at construction time.

Specified by:

low in class ConstantRange

Returns:

the lower bound if any, or an exception will be fired

high

public Constant high()

Description copied from class: ConstantRange

Returns the higher bound. Note that due to the automatic type conversion, the returned constant may have a type different from that of the constant passed at construction time.

Specified by:

high in class ConstantRange

Returns:

the higher bound if any, or an exception will be fired

isLowInclusive

public boolean isLowInclusive()

Specified by:

isLowInclusive in class ConstantRange

isHighInclusive

public boolean isHighInclusive()

Specified by:

isHighInclusive in class ConstantRange

length

public double length()

Specified by:

length in class ConstantRange

applyLow

public ConstantRange applyLow(Constant c,
                              boolean incl)

Description copied from class: ConstantRange

Returns a new range with low set to the specified constant if doing so makes the lower bound more strict.

Specified by:

applyLow in class ConstantRange

Parameters:

c - the specified constant

incl - whether the constant is inclusive

Returns:

a new range instance with equal or more strict lower bound

applyHigh

public ConstantRange applyHigh(Constant c,
                               boolean incl)

Description copied from class: ConstantRange

Returns a new range with high set to the specified constant if doing so makes the upper bound more strict.

Specified by:

applyHigh in class ConstantRange

Parameters:

c - the specified constant

incl - whether the constant is inclusive

Returns:

a new range instance with equal or more strict upper bound

applyConstant

public ConstantRange applyConstant(Constant c)

Specified by:

applyConstant in class ConstantRange

isConstant

public boolean isConstant()

Specified by:

isConstant in class ConstantRange

asConstant

public Constant asConstant()

Specified by:

asConstant in class ConstantRange

contains

public boolean contains(Constant c)

Specified by:

contains in class ConstantRange

lessThan

public boolean lessThan(Constant c)

Specified by:

lessThan in class ConstantRange

largerThan

public boolean largerThan(Constant c)

Specified by:

largerThan in class ConstantRange

isOverlapping

public boolean isOverlapping(ConstantRange r)

Specified by:

isOverlapping in class ConstantRange

contains

public boolean contains(ConstantRange r)

Specified by:

contains in class ConstantRange

intersect

public ConstantRange intersect(ConstantRange r)

Specified by:

intersect in class ConstantRange

union

public ConstantRange union(ConstantRange r)

Specified by:

union in class ConstantRange