org.neo4j.function

Class Suppliers

java.lang.Object

org.neo4j.function.Suppliers

public final class Suppliers
extends Object

Constructors for basic Supplier types

Constructor Summary

Constructors

Constructor and Description
Suppliers()

Method Summary

Methods

Modifier and Type	Method and Description
static <T,V> Supplier<T>	adapted(Supplier<V> supplier, Function<V,T> adaptor) Creates a new Supplier that applies the specified function to the values obtained from a source supplier.
static <T> Supplier<Boolean>	compose(Supplier<T> input, Predicate<T> predicate)
static <T> Supplier<T>	lazySingleton(Supplier<T> supplier) Creates a lazy initialized Supplier of a single object
static <T> Supplier<T>	singleton(T instance) Creates a Supplier that returns a single object

Methods inherited from class java.lang.Object

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

Constructor Detail

Suppliers

public Suppliers()

Method Detail

singleton

public static <T> Supplier<T> singleton(T instance)

Creates a Supplier that returns a single object

Type Parameters:

T - The object type

Parameters:

instance - The object to return

Returns:

A Supplier returning the specified object instance

lazySingleton

public static <T> Supplier<T> lazySingleton(Supplier<T> supplier)

Creates a lazy initialized Supplier of a single object

Type Parameters:

T - The object type

Parameters:

supplier - A supplier that will provide the object when required

Returns:

A Supplier returning the specified object instance

adapted

public static <T,V> Supplier<T> adapted(Supplier<V> supplier,
                        Function<V,T> adaptor)

Creates a new Supplier that applies the specified function to the values obtained from a source supplier. The function is only invoked once for every sequence of identical objects obtained from the source supplier (the previous result is cached and returned again if the source object hasn't changed).

Type Parameters:

V - The source object type

T - The result object type

Parameters:

supplier - A supplier of source objects

adaptor - A function mapping source objects to result objects

Returns:

A Supplier of objects

compose

public static <T> Supplier<Boolean> compose(Supplier<T> input,
                            Predicate<T> predicate)