Package com.google.common.collect
Class MutableClassToInstanceMap<B>
- java.lang.Object
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- com.google.common.collect.ForwardingObject
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- com.google.common.collect.ForwardingMap<K,V>
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- com.google.common.collect.MutableClassToInstanceMap<B>
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- 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 alsoImmutableClassToInstanceMap
.See the Guava User Guide article on
ClassToInstanceMap
.- Since:
- 2.0 (imported from Google Collections Library)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static <B> MutableClassToInstanceMap<B>
create()
Returns a newMutableClassToInstanceMap
instance backed by aHashMap
using the default initial capacity and load factor.static <B> MutableClassToInstanceMap<B>
create(Map<Class<? extends B>,B> backingMap)
Returns a newMutableClassToInstanceMap
instance backed by a given emptybackingMap
.Set<Map.Entry<K,V>>
entrySet()
<T extends B>
TgetInstance(Class<T> type)
Returns the value the specified class is mapped to, ornull
if no entry for this class is present.V
put(K key, V value)
void
putAll(Map<? extends K,? extends V> map)
<T extends B>
TputInstance(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, values
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Methods inherited from class com.google.common.collect.ForwardingObject
toString
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Methods inherited from interface java.util.Map
clear, compute, computeIfAbsent, computeIfPresent, containsKey, containsValue, entrySet, equals, forEach, get, getOrDefault, hashCode, isEmpty, keySet, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, replaceAll, size, values
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Method Detail
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create
public static <B> MutableClassToInstanceMap<B> create()
Returns a newMutableClassToInstanceMap
instance backed by aHashMap
using the default initial capacity and load factor.
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create
public static <B> MutableClassToInstanceMap<B> create(Map<Class<? extends B>,B> backingMap)
Returns a newMutableClassToInstanceMap
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.
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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.
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getInstance
public <T extends B> T getInstance(Class<T> type)
Description copied from interface:ClassToInstanceMap
Returns the value the specified class is mapped to, ornull
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>
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entrySet
public Set<Map.Entry<K,V>> entrySet()
- Specified by:
entrySet
in interfaceMap<K,V>
- Overrides:
entrySet
in classForwardingMap<K,V>
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put
public V put(K key, V value)
- Specified by:
put
in interfaceMap<K,V>
- Overrides:
put
in classForwardingMap<K,V>
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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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