org.optaplanner.core.impl.domain.valuerange.buildin.primint

Class IntValueRange

java.lang.Object

org.optaplanner.core.impl.domain.valuerange.AbstractCountableValueRange<Integer>

org.optaplanner.core.impl.domain.valuerange.buildin.primint.IntValueRange

All Implemented Interfaces:

Serializable, CountableValueRange<Integer>, ValueRange<Integer>

public class IntValueRange
extends AbstractCountableValueRange<Integer>

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
IntValueRange(int from, int to)
IntValueRange(int from, int to, int incrementUnit)

Method Summary

Modifier and Type	Method and Description
boolean	contains(Integer value)
Iterator<Integer>	createOriginalIterator() Select the elements in original (natural) order.
Iterator<Integer>	createRandomIterator(Random workingRandom) Select in random order, but without shuffling the elements.
Integer	get(long index) Used by uniform random selection in a composite or nullable CountableValueRange.
long	getSize() Used by uniform random selection in a composite or nullable CountableValueRange.
String	toString()

Methods inherited from class org.optaplanner.core.impl.domain.valuerange.AbstractCountableValueRange

isEmpty

Methods inherited from class java.lang.Object

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

Constructor Detail

IntValueRange

public IntValueRange(int from,
                     int to)

Parameters:

from - inclusive minimum

to - exclusive maximum, >= from

IntValueRange

public IntValueRange(int from,
                     int to,
                     int incrementUnit)

Parameters:

from - inclusive minimum

to - exclusive maximum, >= from

incrementUnit - > 0

Method Detail

getSize

public long getSize()

Description copied from interface: CountableValueRange

Used by uniform random selection in a composite or nullable CountableValueRange.

Returns:

the exact number of elements generated by this CountableValueRange, always >= 0

contains

public boolean contains(Integer value)

Parameters:

value - sometimes null

Returns:

true if the ValueRange contains that value

get

public Integer get(long index)

Description copied from interface: CountableValueRange

Used by uniform random selection in a composite or nullable CountableValueRange.

Parameters:

index - always < CountableValueRange.getSize()

Returns:

sometimes null (if PlanningVariable.nullable() is true)

createOriginalIterator

public Iterator<Integer> createOriginalIterator()

Description copied from interface: CountableValueRange

Select the elements in original (natural) order.

Returns:

never null

createRandomIterator

public Iterator<Integer> createRandomIterator(Random workingRandom)

Description copied from interface: ValueRange

Select in random order, but without shuffling the elements. Each element might be selected multiple times. Scales well because it does not require caching.

Parameters:

workingRandom - never null, the Random to use when any random number is needed, so EnvironmentMode.REPRODUCIBLE works correctly. RandomUtils can be useful too.

Returns:

never null

toString

public String toString()

Overrides:

toString in class Object