org.apache.shiro.util
Class CollectionUtils

java.lang.Object
  extended by org.apache.shiro.util.CollectionUtils

public class CollectionUtils
extends Object

Static helper class for use dealing with Collections.

Since:
0.9

Constructor Summary
CollectionUtils()
           
 
Method Summary
static
<E> List<E>
asList(E... elements)
           
static
<E> Set<E>
asSet(E... elements)
           
static boolean isEmpty(Collection c)
          Returns true if the specified Collection is null or empty, false otherwise.
static boolean isEmpty(Map m)
          Returns true if the specified Map is null or empty, false otherwise.
static boolean isEmpty(PrincipalCollection principals)
          Returns true if the specified PrincipalCollection is null or empty, false otherwise.
static int size(Collection c)
          Returns the size of the specified collection or 0 if the collection is null.
static int size(Map m)
          Returns the size of the specified map or 0 if the map is null.
 
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

asSet

public static <E> Set<E> asSet(E... elements)

isEmpty

public static boolean isEmpty(Collection c)
Returns true if the specified Collection is null or empty, false otherwise.

Parameters:
c - the collection to check
Returns:
true if the specified Collection is null or empty, false otherwise.
Since:
1.0

isEmpty

public static boolean isEmpty(Map m)
Returns true if the specified Map is null or empty, false otherwise.

Parameters:
m - the Map to check
Returns:
true if the specified Map is null or empty, false otherwise.
Since:
1.0

size

public static int size(Collection c)
Returns the size of the specified collection or 0 if the collection is null.

Parameters:
c - the collection to check
Returns:
the size of the specified collection or 0 if the collection is null.
Since:
1.2

size

public static int size(Map m)
Returns the size of the specified map or 0 if the map is null.

Parameters:
m - the map to check
Returns:
the size of the specified map or 0 if the map is null.
Since:
1.2

isEmpty

public static boolean isEmpty(PrincipalCollection principals)
Returns true if the specified PrincipalCollection is null or empty, false otherwise.

Parameters:
principals - the principals to check.
Returns:
true if the specified PrincipalCollection is null or empty, false otherwise.
Since:
1.0

asList

public static <E> List<E> asList(E... elements)


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