Package org.apache.calcite.util

Class MonotonicSupplier<E>

java.lang.Object

org.apache.calcite.util.MonotonicSupplier<E>

Type Parameters:

E - Element type

All Implemented Interfaces:

Consumer<E>, Supplier<E>

public class MonotonicSupplier<E>
extends Object
implements Consumer<E>, Supplier<E>

Supplier that awaits a value and allows the value to be set, once, to a not-null value. The value supplied by get() is never null.

Not thread-safe.

Constructor Summary

Constructors

Constructor	Description
MonotonicSupplier()

Method Summary

Modifier and Type	Method	Description
void	accept(E e)
static <E> MonotonicSupplier<E>	empty()	Creates a MonotonicSupplier.
E	get()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.function.Consumer

andThen

Constructor Details

MonotonicSupplier

public MonotonicSupplier()

Method Details

empty

public static <E> MonotonicSupplier<E> empty()

Creates a MonotonicSupplier.

accept

public void accept(E e)

Sets the value once and for all.

Specified by:

accept in interface Consumer<E>

get

public E get()

Specified by:

get in interface Supplier<E>