Package ch.rasc.wamp2spring.util

Class CollectionHelper

java.lang.Object

ch.rasc.wamp2spring.util.CollectionHelper

public class CollectionHelper
extends Object

Collection helper class

Constructor Summary

Constructors

Constructor	Description
CollectionHelper()

Method Summary

Modifier and Type	Method	Description
static <T> List<Object>	toList(Collection<T> collection)	Converts an arbitrary Collection to a List.
static <T> List<T>	toList(T... arguments)	Converts a vararg argument to a List.
static Set<Long>	toSet(Collection<Long> collection)	Converts an arbitrary Collection to a Set.

Methods inherited from class java.lang.Object

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

Constructor Details

CollectionHelper

public CollectionHelper()

Method Details

toList

@SafeVarargs
@Nullable
public static <T> List<T> toList(@Nullable
 T... arguments)

Converts a vararg argument to a List.

Parameters:

arguments - variable number of instances

Returns:

a List instance with the provided arguments

toList

@Nullable
public static <T> List<Object> toList(@Nullable
 Collection<T> collection)

Converts an arbitrary Collection to a List.

Returns the same object if the provided parameter is already an instance of List.

Parameters:

collection - an arbitrary instance of Collection

Returns:

an instance of List containing all the elements of the provided collection

toSet

@Nullable
public static Set<Long> toSet(@Nullable
 Collection<Long> collection)

Converts an arbitrary Collection to a Set. Removes duplicates.

Parameters:

collection - an arbitrary instance of Collection

Returns:

an instance of Set containing all the elements of the provided collection.