org.codeartisans.java.toolbox
Class CollectionUtils

java.lang.Object
  org.codeartisans.java.toolbox.CollectionUtils

public final class CollectionUtils
extends Object

Method Summary

static <T> Collection<T>	added(Collection<T> left, Collection<T> right)
static boolean	collectionEquals(Collection<?> oldCollection, Collection<?> newCollection)
static <T> T	firstElementOrNull(Iterable<T> iterable)
static <T> Collection<T>	removed(Collection<T> left, Collection<T> right)

Methods inherited from class java.lang.Object

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

Method Detail

firstElementOrNull

public static <T> T firstElementOrNull(Iterable<T> iterable)

collectionEquals

public static boolean collectionEquals(Collection<?> oldCollection,
                                       Collection<?> newCollection)

Parameters:

oldCollection - A Collection

newCollection - Another Collection

Returns:

True iff both collection are null or contains the same elements, false otherwise.

removed

public static <T> Collection<T> removed(Collection<T> left,
                                        Collection<T> right)

Type Parameters:

T - Type of collection elements.

Parameters:

left - Left collection of query. Treated as an empty collection if null.

right - Right collection of query. Treated as an empty collection if null.

Returns:

A collection containing elements from the left collection not present in the right collection.

added

public static <T> Collection<T> added(Collection<T> left,
                                      Collection<T> right)

Type Parameters:

T - Type of collection elements.

Parameters:

left - Left collection of query. Treated as an empty collection if null.

right - Right collection of query. Treated as an empty collection if null.

Returns:

A collection containing elements from the right collection not present in the left collection.