org.mapfish.print

Class OptionalUtils

java.lang.Object

org.mapfish.print.OptionalUtils

public final class OptionalUtils
extends java.lang.Object

Utilities for Java's Optional class.

Method Summary

Modifier and Type	Method and Description
static <T> java.util.Optional<T>	or(java.util.Optional<T> a, java.util.Optional<? extends T> b) Return the first optional to be defined.
static <T> java.util.Optional<T>	or(java.util.function.Supplier<java.util.Optional<? extends T>>... optionals) Return the first optional to be defined.

Methods inherited from class java.lang.Object

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

Method Detail

or

public static <T> java.util.Optional<T> or(java.util.Optional<T> a,
                                           java.util.Optional<? extends T> b)

Return the first optional to be defined.

Type Parameters:

T - The type

Parameters:

a - The first

b - The second

Returns:

a or b or empty

or

@SafeVarargs
public static <T> java.util.Optional<T> or(java.util.function.Supplier<java.util.Optional<? extends T>>... optionals)

Return the first optional to be defined.

Type Parameters:

T - The type

Parameters:

optionals - the lambdas returning the optionals

Returns:

the first non-empty or empty