com.edorasware.commons.core.util.fp

Class Functions

java.lang.Object

com.edorasware.commons.core.util.fp.Functions

public abstract class Functions
extends Object

Provides functions used in transformation operations.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Functions.FromOptional<T>

Method Summary

Modifier and Type	Method and Description
static <T> com.google.common.base.Function<Optional<T>,T>	fromOptional(T defaultValue) Returns a function that returns the referenced value of each Optional or the given default if a value is not present.
static boolean	isNullFunction(com.google.common.base.Function<?,?> function)
static <F,T> com.google.common.base.Function<F,T>	nullFunction()

Methods inherited from class java.lang.Object

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

Method Detail

nullFunction

public static <F,T> com.google.common.base.Function<F,T> nullFunction()

isNullFunction

public static boolean isNullFunction(com.google.common.base.Function<?,?> function)

fromOptional

public static <T> com.google.common.base.Function<Optional<T>,T> fromOptional(T defaultValue)

Returns a function that returns the referenced value of each Optional or the given default if a value is not present.

Type Parameters:

T - the type of the value

Parameters:

defaultValue - the default value to transform to if no value is present on the Optional, default value may be null

Returns:

a function transforming Optionals to their values or the default value

See Also:

Optional#or(Object)