org.acegisecurity.domain.util
Class CollectionUtils

java.lang.Object
  org.acegisecurity.domain.util.CollectionUtils

public class CollectionUtils
extends Object

Some utility methods to use Collections.

Version:

$Id: CollectionUtils.java,v 1.3 2005/11/17 00:55:50 benalex Exp $

Author:

Carlos Sanchez

Constructor Summary

CollectionUtils()

Method Summary

static <E> List<E>	add(List<E> list, E object) Add an object to a List and return the result.
static <E> Set<E>	add(Set<E> set, E object) Add an object to a Set and return the result.
static <E> Collection<E>	clone(Collection<E> collection) Clone a Collection copying all its elements to a new one.
static <K,V> Map<K,V>	clone(Map<K,V> map) Clone a Map copying all its elements to a new one.
static boolean	isCollection(Class theClass)
static boolean	isMap(Class theClass)
static <E> List<E>	newList(E object) Return a List (actually an ArrayList) with only that object.
static <E> Set<E>	newSet(E object) Return a Set (actually a HashSet) with only that object.

Methods inherited from class java.lang.Object

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

Constructor Detail

CollectionUtils

public CollectionUtils()

Method Detail

isCollection

public static boolean isCollection(Class theClass)

isMap

public static boolean isMap(Class theClass)

add

public static <E> Set<E> add(Set<E> set,
                             E object)

Add an object to a Set and return the result.

Parameters:

set -

object -

Returns:

add

public static <E> List<E> add(List<E> list,
                              E object)

Add an object to a List and return the result.

Parameters:

list -

object -

Returns:

clone

public static <E> Collection<E> clone(Collection<E> collection)

Clone a Collection copying all its elements to a new one. If map is null return null.

Parameters:

collection -

Returns:

Throws:

IllegalArgumentException - DOCUMENT ME!

clone

public static <K,V> Map<K,V> clone(Map<K,V> map)

Clone a Map copying all its elements to a new one. If the passed argument is null, the method will return null.

Parameters:

map - to copy

Returns:

a copy of the Map passed as an argument

Throws:

IllegalArgumentException - if the Map implementation is not supported by this method

newList

public static <E> List<E> newList(E object)

Return a List (actually an ArrayList) with only that object.

Parameters:

object -

Returns:

newSet

public static <E> Set<E> newSet(E object)

Return a Set (actually a HashSet) with only that object.

Parameters:

object -

Returns: