com.google.common.reflect
Class ImmutableTypeToInstanceMap<B>

java.lang.Object
  extended by com.google.common.collect.ForwardingObject
      extended by com.google.common.collect.ForwardingMap<TypeToken<? extends B>,B>
          extended by com.google.common.reflect.ImmutableTypeToInstanceMap<B>
All Implemented Interfaces:
TypeToInstanceMap<B>, Map<TypeToken<? extends B>,B>

@Beta
public final class ImmutableTypeToInstanceMap<B>
extends ForwardingMap<TypeToken<? extends B>,B>
implements TypeToInstanceMap<B>

A type-to-instance map backed by an ImmutableMap. See also MutableTypeToInstanceMap.

Since:
13.0
Author:
Ben Yu

Nested Class Summary
static class ImmutableTypeToInstanceMap.Builder<B>
          A builder for creating immutable type-to-instance maps.
 
Nested classes/interfaces inherited from class com.google.common.collect.ForwardingMap
ForwardingMap.StandardEntrySet, ForwardingMap.StandardKeySet, ForwardingMap.StandardValues
 
Nested classes/interfaces inherited from interface java.util.Map
Map.Entry<K,V>
 
Method Summary
static
<B> ImmutableTypeToInstanceMap.Builder<B>
builder()
          Returns a new builder.
protected  Map<TypeToken<? extends B>,B> delegate()
          Returns the backing delegate instance that methods are forwarded to.
<T extends B>
T
getInstance(Class<T> type)
          Returns the value the specified class is mapped to, or null if no entry for this class is present.
<T extends B>
T
getInstance(TypeToken<T> type)
          Returns the value the specified type is mapped to, or null if no entry for this type is present.
static
<B> ImmutableTypeToInstanceMap<B>
of()
          Returns an empty type to instance map.
<T extends B>
T
putInstance(Class<T> type, T value)
          Guaranteed to throw an exception and leave the map unmodified.
<T extends B>
T
putInstance(TypeToken<T> type, T value)
          Guaranteed to throw an exception and leave the map unmodified.
 
Methods inherited from class com.google.common.collect.ForwardingMap
clear, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, put, putAll, remove, size, standardClear, standardContainsKey, standardContainsValue, standardEquals, standardHashCode, standardIsEmpty, standardPutAll, standardRemove, standardToString, values
 
Methods inherited from class com.google.common.collect.ForwardingObject
toString
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface java.util.Map
clear, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, put, putAll, remove, size, values
 

Method Detail

of

public static <B> ImmutableTypeToInstanceMap<B> of()
Returns an empty type to instance map.


builder

public static <B> ImmutableTypeToInstanceMap.Builder<B> builder()
Returns a new builder.


getInstance

public <T extends B> T getInstance(TypeToken<T> type)
Description copied from interface: TypeToInstanceMap
Returns the value the specified type is mapped to, or null if no entry for this type is present. This will only return a value that was bound to this specific type, not a value that may have been bound to a subtype.

Specified by:
getInstance in interface TypeToInstanceMap<B>

putInstance

public <T extends B> T putInstance(TypeToken<T> type,
                                   T value)
Guaranteed to throw an exception and leave the map unmodified.

Specified by:
putInstance in interface TypeToInstanceMap<B>
Returns:
the value previously associated with this type (possibly null), or null if there was no previous entry.
Throws:
UnsupportedOperationException - always

getInstance

public <T extends B> T getInstance(Class<T> type)
Description copied from interface: TypeToInstanceMap
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.

getInstance(Foo.class) is equivalent to getInstance(TypeToken.of(Foo.class)).

Specified by:
getInstance in interface TypeToInstanceMap<B>

putInstance

public <T extends B> T putInstance(Class<T> type,
                                   T value)
Guaranteed to throw an exception and leave the map unmodified.

Specified by:
putInstance in interface TypeToInstanceMap<B>
Returns:
the value previously associated with this class (possibly null), or null if there was no previous entry.
Throws:
UnsupportedOperationException - always

delegate

protected Map<TypeToken<? extends B>,B> 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 class ForwardingMap<TypeToken<? extends B>,B>


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