Uses of Interface
org.apache.juneau.commons.function.OptionalSupplier

Packages that use OptionalSupplier

Package	Description
org.apache.juneau.commons.function	Functional programming utilities including enhanced function interfaces, consumers, suppliers, tuples, and exception-handling variants.
org.apache.juneau.commons.settings	Thread-safe system property access with support for global and per-thread overrides, making it useful for unit tests and configuration management.
org.apache.juneau.commons.utils	Common internal utilities.

Uses of OptionalSupplier in org.apache.juneau.commons.function

Classes in org.apache.juneau.commons.function that implement OptionalSupplier

Modifier and Type	Class	Description
class	ResettableSupplier<T>	A thread-safe supplier that caches the result of the first call and supports resetting the cache.

Methods in org.apache.juneau.commons.function that return OptionalSupplier

Modifier and Type	Method	Description
static <T> OptionalSupplier<T>	OptionalSupplier.empty()	Creates an empty OptionalSupplier that always returns null.
default OptionalSupplier<T>	OptionalSupplier.filter(Predicate<? super T> predicate)	If a value is present, and the value matches the given predicate, returns an OptionalSupplier describing the value, otherwise returns an empty OptionalSupplier.
default <U> OptionalSupplier<U>	OptionalSupplier.flatMap(Function<? super T,? extends OptionalSupplier<? extends U>> mapper)	If a value is present, returns the result of applying the given OptionalSupplier-bearing mapping function to the value, otherwise returns an empty OptionalSupplier.
default <U> OptionalSupplier<U>	OptionalSupplier.map(Function<? super T,? extends U> mapper)	If a value is present, applies the provided mapping function to it and returns an OptionalSupplier describing the result.
static <T> OptionalSupplier<T>	OptionalSupplier.of(Supplier<T> supplier)	Creates an OptionalSupplier from a Supplier.
static <T> OptionalSupplier<T>	OptionalSupplier.ofNullable(T value)	Creates an OptionalSupplier that always returns the specified value.

Method parameters in org.apache.juneau.commons.function with type arguments of type OptionalSupplier

Modifier and Type	Method	Description
default <U> OptionalSupplier<U>	OptionalSupplier.flatMap(Function<? super T,? extends OptionalSupplier<? extends U>> mapper)	If a value is present, returns the result of applying the given OptionalSupplier-bearing mapping function to the value, otherwise returns an empty OptionalSupplier.

Uses of OptionalSupplier in org.apache.juneau.commons.settings

Classes in org.apache.juneau.commons.settings that implement OptionalSupplier

Modifier and Type	Class	Description
class	Setting<T>	A resettable supplier that provides convenience methods for type conversion.
class	StringSetting	A specialized Setting for string values that provides convenience methods for type conversion.

Methods in org.apache.juneau.commons.settings with parameters of type OptionalSupplier

Modifier and Type	Method	Description
Settings.Builder	Settings.Builder.globalStore(OptionalSupplier<SettingStore> supplier)	Sets the supplier for the global store.
Settings.Builder	Settings.Builder.localStore(OptionalSupplier<SettingStore> supplier)	Sets the supplier for the local (per-thread) store.

Uses of OptionalSupplier in org.apache.juneau.commons.utils

Methods in org.apache.juneau.commons.utils that return OptionalSupplier

Modifier and Type	Method	Description
static <T> OptionalSupplier<T>	Utils.mem(Supplier<T> supplier)	Creates a thread-safe memoizing supplier that computes a value once and caches it.