org.axonframework.common

Class CollectionUtils

java.lang.Object

org.axonframework.common.CollectionUtils

public abstract class CollectionUtils
extends Object

Utility methods for operations on collections.

Since:

0.7

Author:

Allard Buijze

Method Summary

Modifier and Type	Method and Description
static <S,T extends Collection<S>> T	merge(T collection1, T collection2, Supplier<T> factoryMethod) Merge two collections into a new collection instance.

Methods inherited from class java.lang.Object

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

Method Detail

merge

public static <S,T extends Collection<S>> T merge(T collection1,
                                                  T collection2,
                                                  Supplier<T> factoryMethod)

Merge two collections into a new collection instance. The new collection is created using the given factoryMethod.

If any of the two inputs collections is null or empty the other input collection is returned (even if that one is null as well).

Type Parameters:

S - the type of elements in the collections

T - the type of collection

Parameters:

collection1 - the first collection

collection2 - the second collection

factoryMethod - function to initialize the new collection

Returns:

a collection that combines both collections