Package org.ow2.authzforce.core.pdp.api

Class UpdatableCollections

java.lang.Object

org.ow2.authzforce.core.pdp.api.UpdatableCollections

public final class UpdatableCollections
extends Object

Factory for UpdatableLists

Method Summary

Modifier and Type	Method	Description
static <E> UpdatableList<E>	emptyList()	Get instance of UpdatableList that does not update anything and UpdatableList.copy() always return an empty list.
static <K,V> UpdatableMap<K,V>	emptyMap()	Get instance of UpdatableMap that does not update anything and UpdatableMap.copy() always return an empty Map.
static <E> UpdatableSet<E>	emptySet()	Get instance of UpdatableSet that does not update anything and UpdatableSet.copy() always return an empty Set.
static <E> UpdatableList<E>	newUpdatableList()	Create new instance of UpdatableList not accepting null values
static <K,V> UpdatableMap<K,V>	newUpdatableMap()	Create new instance of UpdatableMap not accepting null values
static <E> UpdatableSet<E>	newUpdatableSet()	Create new instance of UpdatableSet not accepting null values

Methods inherited from class java.lang.Object

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

Method Detail

emptyList

public static <E> UpdatableList<E> emptyList()

Get instance of UpdatableList that does not update anything and UpdatableList.copy() always return an empty list. This implementation does not raise any exception on UpdatableCollection.add(Object) and UpdatableCollection.addAll(Collection) method but merely return false always. This is useful merely for polymorphism.

Returns:

"empty" list, i.e. list that silently ignores updates and always stays empty

newUpdatableList

public static <E> UpdatableList<E> newUpdatableList()

Create new instance of UpdatableList not accepting null values

Returns:

new instance

emptySet

public static <E> UpdatableSet<E> emptySet()

Get instance of UpdatableSet that does not update anything and UpdatableSet.copy() always return an empty Set. This implementation does not raise any exception on UpdatableCollection.add(Object) and UpdatableCollection.addAll(Collection) method but merely return false always. This is useful merely for polymorphism.

Returns:

"empty" Set, i.e. list that silently ignores updates and always stays empty

newUpdatableSet

public static <E> UpdatableSet<E> newUpdatableSet()

Create new instance of UpdatableSet not accepting null values

Returns:

new instance

emptyMap

public static <K,V> UpdatableMap<K,V> emptyMap()

Get instance of UpdatableMap that does not update anything and UpdatableMap.copy() always return an empty Map. This implementation does not raise any exception on UpdatableMap.put(Object, Object) and UpdatableMap.putAll(Map) method but merely return false always. This is useful merely for polymorphism.

Returns:

"empty" Set, i.e. list that silently ignores updates and always stays empty

newUpdatableMap

public static <K,V> UpdatableMap<K,V> newUpdatableMap()

Create new instance of UpdatableMap not accepting null values

Returns:

new instance