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java.lang.Object org.apache.shiro.util.CollectionUtils
public class CollectionUtils
Static helper class for use dealing with Collections.
Constructor Summary | |
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CollectionUtils()
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Method Summary | ||
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static
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asList(E... elements)
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static
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asSet(E... elements)
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static boolean |
isEmpty(Collection c)
Returns true if the specified Collection is null or empty ,
false otherwise. |
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static boolean |
isEmpty(Map m)
Returns true if the specified Map is null or empty ,
false otherwise. |
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static boolean |
isEmpty(PrincipalCollection principals)
Returns true if the specified PrincipalCollection is null or
empty , false otherwise. |
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static int |
size(Collection c)
Returns the size of the specified collection or 0 if the collection is null . |
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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 |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public CollectionUtils()
Method Detail |
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public static <E> Set<E> asSet(E... elements)
public static boolean isEmpty(Collection c)
true
if the specified Collection
is null
or empty
,
false
otherwise.
c
- the collection to check
true
if the specified Collection
is null
or empty
,
false
otherwise.public static boolean isEmpty(Map m)
true
if the specified Map
is null
or empty
,
false
otherwise.
m
- the Map
to check
true
if the specified Map
is null
or empty
,
false
otherwise.public static int size(Collection c)
0
if the collection is null
.
c
- the collection to check
0
if the collection is null
.public static int size(Map m)
0
if the map is null
.
m
- the map to check
0
if the map is null
.public static boolean isEmpty(PrincipalCollection principals)
true
if the specified PrincipalCollection
is null
or
empty
, false
otherwise.
principals
- the principals to check.
true
if the specified PrincipalCollection
is null
or
empty
, false
otherwise.public static <E> List<E> asList(E... elements)
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