com.google.common.collect
Class MapConstraints

java.lang.Object
  com.google.common.collect.MapConstraints

@Beta
@GwtCompatible
public final class MapConstraints
extends Object

Factory and utilities pertaining to the MapConstraint interface.

Since:

3

Author:

Mike Bostock

See Also:

Constraints

notNull

public static MapConstraint<Object,Object> notNull()

Returns a constraint that verifies that neither the key nor the value is null. If either is null, a NullPointerException is thrown.

constrainedMap

public static <K,V> Map<K,V> constrainedMap(Map<K,V> map,
                                            MapConstraint<? super K,? super V> constraint)

Returns a constrained view of the specified map, using the specified constraint. Any operations that add new mappings will call the provided constraint. However, this method does not verify that existing mappings satisfy the constraint.

The returned map is not serializable.

Parameters:

map - the map to constrain

constraint - the constraint that validates added entries

Returns:

a constrained view of the specified map

constrainedMultimap

public static <K,V> Multimap<K,V> constrainedMultimap(Multimap<K,V> multimap,
                                                      MapConstraint<? super K,? super V> constraint)

Returns a constrained view of the specified multimap, using the specified constraint. Any operations that add new mappings will call the provided constraint. However, this method does not verify that existing mappings satisfy the constraint.

Note that the generated multimap's Multimap.removeAll(java.lang.Object) and Multimap.replaceValues(K, java.lang.Iterable) methods return collections that are not constrained.

The returned multimap is not serializable.

Parameters:

multimap - the multimap to constrain

constraint - the constraint that validates added entries

Returns:

a constrained view of the multimap

constrainedListMultimap

public static <K,V> ListMultimap<K,V> constrainedListMultimap(ListMultimap<K,V> multimap,
                                                              MapConstraint<? super K,? super V> constraint)

Returns a constrained view of the specified list multimap, using the specified constraint. Any operations that add new mappings will call the provided constraint. However, this method does not verify that existing mappings satisfy the constraint.

Note that the generated multimap's Multimap.removeAll(java.lang.Object) and Multimap.replaceValues(K, java.lang.Iterable) methods return collections that are not constrained.

The returned multimap is not serializable.

Parameters:

multimap - the multimap to constrain

constraint - the constraint that validates added entries

Returns:

a constrained view of the specified multimap

constrainedSetMultimap

public static <K,V> SetMultimap<K,V> constrainedSetMultimap(SetMultimap<K,V> multimap,
                                                            MapConstraint<? super K,? super V> constraint)

Returns a constrained view of the specified set multimap, using the specified constraint. Any operations that add new mappings will call the provided constraint. However, this method does not verify that existing mappings satisfy the constraint.

Note that the generated multimap's Multimap.removeAll(java.lang.Object) and Multimap.replaceValues(K, java.lang.Iterable) methods return collections that are not constrained.

The returned multimap is not serializable.

Parameters:

multimap - the multimap to constrain

constraint - the constraint that validates added entries

Returns:

a constrained view of the specified multimap

constrainedSortedSetMultimap

public static <K,V> SortedSetMultimap<K,V> constrainedSortedSetMultimap(SortedSetMultimap<K,V> multimap,
                                                                        MapConstraint<? super K,? super V> constraint)

Returns a constrained view of the specified sorted-set multimap, using the specified constraint. Any operations that add new mappings will call the provided constraint. However, this method does not verify that existing mappings satisfy the constraint.

Note that the generated multimap's Multimap.removeAll(java.lang.Object) and Multimap.replaceValues(K, java.lang.Iterable) methods return collections that are not constrained.

The returned multimap is not serializable.

Parameters:

multimap - the multimap to constrain

constraint - the constraint that validates added entries

Returns:

a constrained view of the specified multimap

constrainedBiMap

public static <K,V> BiMap<K,V> constrainedBiMap(BiMap<K,V> map,
                                                MapConstraint<? super K,? super V> constraint)

Returns a constrained view of the specified bimap, using the specified constraint. Any operations that modify the bimap will have the associated keys and values verified with the constraint.

The returned bimap is not serializable.

Parameters:

map - the bimap to constrain

constraint - the constraint that validates added entries

Returns:

a constrained view of the specified bimap