Package org.dspace.util

Class FunctionalUtils

java.lang.Object

org.dspace.util.FunctionalUtils

public class FunctionalUtils
extends Object

These methods are linked to the functional paradigm and use Functional interfaces of java 8+, all the main interfaces are in the package java.util.function.

Author:

Vincenzo Mecca (vins01-4science - vincenzo.mecca at 4science.com)

Method Summary

Modifier and Type	Method	Description
static <T> T	getCheckDefaultOrBuild(Predicate<T> defaultValueChecker, T defaultValue, Supplier<T> builder)	Tests the defaultValue using the defaultValueChecker.
static <T> T	getDefaultOrBuild(T defaultValue, Supplier<T> builder)	Tests that defaultValue isn't null.

Methods inherited from class java.lang.Object

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

Method Detail

getDefaultOrBuild

public static <T> T getDefaultOrBuild(T defaultValue,
                                      Supplier<T> builder)

Tests that defaultValue isn't null. If this test is positive, then returns the defaultValue; Otherwise builds a new instance using the builder

Parameters:

defaultValue - default instance value

builder - instance generator

Returns:

corresponding non-null instance

getCheckDefaultOrBuild

public static <T> T getCheckDefaultOrBuild(Predicate<T> defaultValueChecker,
                                           T defaultValue,
                                           Supplier<T> builder)

Tests the defaultValue using the defaultValueChecker. If its test is positive, then returns the defaultValue; Otherwise builds a new instance using the builder

Parameters:

defaultValueChecker - checker that tests the defaultValue

defaultValue - default instance value

builder - supplier that generates a typed instance

Returns:

corresponding instance after check