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MutableClassToInstanceMap (Guava: Google Core Libraries for Java 11.0.1 API)
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com.google.common.collect
Class MutableClassToInstanceMap<B>
java.lang.Object
com.google.common.collect.ForwardingObject
com.google.common.collect.ForwardingMap<K,V>
com.google.common.collect.MutableClassToInstanceMap<B>
- All Implemented Interfaces:
- ClassToInstanceMap<B>, Map<Class<? extends B>,B>
public final class MutableClassToInstanceMap<B>
- extends ForwardingMap<K,V>
- implements ClassToInstanceMap<B>
A mutable class-to-instance map backed by an arbitrary user-provided map.
See also ImmutableClassToInstanceMap
.
- Since:
- 2.0 (imported from Google Collections Library)
- Author:
- Kevin Bourrillion
Nested Class Summary |
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Nested classes/interfaces inherited from class com.google.common.collect.ForwardingMap |
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ForwardingMap.StandardEntrySet, ForwardingMap.StandardKeySet, ForwardingMap.StandardValues |
Nested classes/interfaces inherited from interface java.util.Map |
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Map.Entry<K,V> |
Method Summary | ||
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static
|
create()
Returns a new MutableClassToInstanceMap instance backed by a HashMap using the default initial capacity and load factor. |
|
static
|
create(Map<Class<? extends B>,B> backingMap)
Returns a new MutableClassToInstanceMap instance backed by a given
empty backingMap . |
|
protected Map<K,V> |
delegate()
Returns the backing delegate instance that methods are forwarded to. |
|
Set<Map.Entry<K,V>> |
entrySet()
|
|
|
getInstance(Class<T> type)
Returns the value the specified class is mapped to, or null if no
entry for this class is present. |
|
V |
put(K key,
V value)
|
|
void |
putAll(Map<? extends K,? extends V> map)
|
|
|
putInstance(Class<T> type,
T value)
Maps the specified class to the specified value. |
Methods inherited from class com.google.common.collect.ForwardingMap |
---|
clear, containsKey, containsValue, equals, get, hashCode, isEmpty, keySet, remove, size, standardClear, standardContainsKey, standardContainsValue, standardEquals, standardHashCode, standardIsEmpty, standardPutAll, standardRemove, standardToString, values |
Methods inherited from class com.google.common.collect.ForwardingObject |
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toString |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Methods inherited from interface java.util.Map |
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clear, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, put, putAll, remove, size, values |
Method Detail |
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create
public static <B> MutableClassToInstanceMap<B> create()
- Returns a new
MutableClassToInstanceMap
instance backed by aHashMap
using the default initial capacity and load factor.
create
public static <B> MutableClassToInstanceMap<B> create(Map<Class<? extends B>,B> backingMap)
- Returns a new
MutableClassToInstanceMap
instance backed by a given emptybackingMap
. The caller surrenders control of the backing map, and thus should not allow any direct references to it to remain accessible.
putInstance
public <T extends B> T putInstance(Class<T> type, T value)
- Description copied from interface:
ClassToInstanceMap
- Maps the specified class to the specified value. Does not associate
this value with any of the class's supertypes.
- Specified by:
putInstance
in interfaceClassToInstanceMap<B>
- Returns:
- the value previously associated with this class (possibly
null
), ornull
if there was no previous entry.
getInstance
public <T extends B> T getInstance(Class<T> type)
- Description copied from interface:
ClassToInstanceMap
- Returns the value the specified class is mapped to, or
null
if no entry for this class is present. This will only return a value that was bound to this specific class, not a value that may have been bound to a subtype.- Specified by:
getInstance
in interfaceClassToInstanceMap<B>
delegate
protected Map<K,V> delegate()
- Description copied from class:
ForwardingObject
- Returns the backing delegate instance that methods are forwarded to.
Abstract subclasses generally override this method with an abstract method
that has a more specific return type, such as
ForwardingSet.delegate()
. Concrete subclasses override this method to supply the instance being decorated.- Specified by:
delegate
in classForwardingMap<K,V>
entrySet
public Set<Map.Entry<K,V>> entrySet()
- Specified by:
entrySet
in interfaceMap<K,V>
- Overrides:
entrySet
in classForwardingMap<K,V>
put
public V put(K key, V value)
- Specified by:
put
in interfaceMap<K,V>
- Overrides:
put
in classForwardingMap<K,V>
putAll
public void putAll(Map<? extends K,? extends V> map)
- Specified by:
putAll
in interfaceMap<K,V>
- Overrides:
putAll
in classForwardingMap<K,V>
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