Package dev.selena.luacore.utils

Class RandomCollection<E>

java.lang.Object

dev.selena.luacore.utils.RandomCollection<E>

Type Parameters:

E - The reward of any type

public class RandomCollection<E>
extends Object

Used for weighted random item/object generation For examples check the wiki

Field Summary

Fields

Modifier and Type	Field	Description
protected final NavigableMap<Double,E>	map

Constructor Summary

Constructors

Constructor	Description
RandomCollection()	Used to initialize the class using a new instance of random
RandomCollection(long seed)	Used to initialize the class using a new instance of random.
RandomCollection(Random random)	Used to initialize the class using a fixed instance of random (Note the seed will be the next long generated this is for serialization reason)

Method Summary

Modifier and Type	Method	Description
RandomCollection<E>	add(double weight, E result)	Used for adding a weight
void	addAll(Map<E,Double> results)	Used for appending the collection map with another existing map
<T> RandomCollection<T>	cloneTo(Class<T> elementType, Function<E,T> function)	Used for cloning a collection instance to another type and doing the required entry manipulation
void	forEach(Function<E,E> function)	Used for executing lambda function on each value
E	getRandom()	Gets a weighted random value
boolean	isEmpty()	Used for checking if the collection is empty

Methods inherited from class java.lang.Object

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

Field Details

map

protected final NavigableMap<Double,E> map

Constructor Details

RandomCollection

public RandomCollection()

Used to initialize the class using a new instance of random

RandomCollection

public RandomCollection(Random random)

Used to initialize the class using a fixed instance of random (Note the seed will be the next long generated this is for serialization reason)

Parameters:

random - The random instance you want to parse in

See Also:

• RandomCollection(long)

RandomCollection

public RandomCollection(long seed)

Used to initialize the class using a new instance of random. You should use this over RandomCollection(Random)

Parameters:

seed - The seed you want to use

Method Details

add

public RandomCollection<E> add(double weight,
 E result)

Used for adding a weight

Parameters:

weight - The weight of the item added to the map

result - The item itself

Returns:

This instance for further usage

getRandom

public E getRandom()

Gets a weighted random value

Returns:

The random value from the map

addAll

public void addAll(Map<E,Double> results)

Used for appending the collection map with another existing map

Parameters:

results - The map of results/loot you want to append to the existing collection

isEmpty

public boolean isEmpty()

Used for checking if the collection is empty

Returns:

True if empty

forEach

public void forEach(Function<E,E> function)

Used for executing lambda function on each value

Parameters:

function - The function you want to execute on each entry

cloneTo

public <T> RandomCollection<T> cloneTo(Class<T> elementType,
 Function<E,T> function)

Used for cloning a collection instance to another type and doing the required entry manipulation

Type Parameters:

T - The element Type of the new collection

Parameters:

elementType - The element type you want to convert to

function - The required data manipulation to make the conversion work

Returns:

The cloned and altered instance