public class Object2ReferenceMaps
extends java.lang.Object
Maps
,
Collections
Modifier and Type | Class and Description |
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static class |
Object2ReferenceMaps.EmptyMap<K,V>
An immutable class representing an empty type-specific map.
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static class |
Object2ReferenceMaps.Singleton<K,V>
An immutable class representing a type-specific singleton map.
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static class |
Object2ReferenceMaps.SynchronizedMap<K,V>
A synchronized wrapper class for maps.
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static class |
Object2ReferenceMaps.UnmodifiableMap<K,V>
An unmodifiable wrapper class for maps.
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Modifier and Type | Field and Description |
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static Object2ReferenceMaps.EmptyMap |
EMPTY_MAP
An empty type-specific map (immutable).
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Modifier and Type | Method and Description |
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static <K,V> Object2ReferenceMap<K,V> |
singleton(K key,
V value)
Returns a type-specific immutable map containing only the specified pair.
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static <K,V> Object2ReferenceMap<K,V> |
synchronize(Object2ReferenceMap<K,V> m)
Returns a synchronized type-specific map backed by the given type-specific map.
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static <K,V> Object2ReferenceMap<K,V> |
synchronize(Object2ReferenceMap<K,V> m,
java.lang.Object sync)
Returns a synchronized type-specific map backed by the given type-specific map, using an assigned object to synchronize.
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static <K,V> Object2ReferenceMap<K,V> |
unmodifiable(Object2ReferenceMap<K,V> m)
Returns an unmodifiable type-specific map backed by the given type-specific map.
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public static final Object2ReferenceMaps.EmptyMap EMPTY_MAP
public static <K,V> Object2ReferenceMap<K,V> singleton(K key, V value)
Note that albeit the returned map is immutable, its default return value may be changed.
key
- the only key of the returned map.value
- the only value of the returned map.<key,value>
.public static <K,V> Object2ReferenceMap<K,V> synchronize(Object2ReferenceMap<K,V> m)
m
- the map to be wrapped in a synchronized map.Collections.synchronizedMap(Map)
public static <K,V> Object2ReferenceMap<K,V> synchronize(Object2ReferenceMap<K,V> m, java.lang.Object sync)
m
- the map to be wrapped in a synchronized map.sync
- an object that will be used to synchronize the access to the map.Collections.synchronizedMap(Map)
public static <K,V> Object2ReferenceMap<K,V> unmodifiable(Object2ReferenceMap<K,V> m)
m
- the map to be wrapped in an unmodifiable map.Collections.unmodifiableMap(Map)