org.apache.camel.util.function

Class Suppliers

java.lang.Object

org.apache.camel.util.function.Suppliers

public final class Suppliers
extends Object

Method Summary

Modifier and Type	Method and Description
static <T> Supplier<T>	constant(T value) Returns a supplier that return a constant value.
static <T> Optional<T>	firstMatching(Predicate<T> predicate, ThrowingSupplier<T,Exception>... suppliers) Returns the first value provide by the given suppliers that matches the given predicate.
static <T> Optional<T>	firstNotNull(ThrowingSupplier<T,Exception>... suppliers) Returns the first non null value provide by the given suppliers.
static <T> Supplier<T>	memorize(Supplier<T> supplier) Returns a supplier which caches the result of the first call to Supplier.get()and returns that value on subsequent calls.
static <T> Supplier<T>	memorize(ThrowingSupplier<T,? extends Exception> supplier, Consumer<Exception> consumer) Returns a supplier which caches the result of the first call to Supplier.get() and returns that value on subsequent calls.

Methods inherited from class java.lang.Object

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

Method Detail

memorize

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

Returns a supplier which caches the result of the first call to Supplier.get()and returns that value on subsequent calls.

Type Parameters:

T - the type of results supplied by this supplier.

Parameters:

supplier - the delegate Supplier.

Returns:

the result fo the first call to the delegate's Supplier.get() method.

memorize

public static <T> Supplier<T> memorize(ThrowingSupplier<T,? extends Exception> supplier,
                                       Consumer<Exception> consumer)

Returns a supplier which caches the result of the first call to Supplier.get() and returns that value on subsequent calls.

Type Parameters:

T - the type of results supplied by this supplier.

Parameters:

supplier - the delegate Supplier.

consumer - a consumer for any exception thrown by the ThrowingSupplier.get().

Returns:

the result fo the first call to the delegate's Supplier.get() method.

constant

public static <T> Supplier<T> constant(T value)

Returns a supplier that return a constant value.

Type Parameters:

T - the type of results supplied by this supplier.

Parameters:

value - the constant value to return.

Returns:

the supplied value.

firstNotNull

@SafeVarargs
public static <T> Optional<T> firstNotNull(ThrowingSupplier<T,Exception>... suppliers)
                                                 throws Exception

Returns the first non null value provide by the given suppliers.

Type Parameters:

T - the type of results supplied by this supplier.

Parameters:

suppliers - a list of supplier.

Returns:

the optional computed value.

Throws:

Exception

firstMatching

public static <T> Optional<T> firstMatching(Predicate<T> predicate,
                                            ThrowingSupplier<T,Exception>... suppliers)
                                     throws Exception

Returns the first value provide by the given suppliers that matches the given predicate.

Type Parameters:

T - the type of results supplied by this supplier.

Parameters:

predicate - the predicate used to evaluate the computed values.

suppliers - a list fo supplier.

Returns:

the optional matching value.

Throws:

Exception