com.google.common.reflect

Class ImmutableTypeToInstanceMap<B>

java.lang.Object

com.google.common.collect.ForwardingObject

com.google.common.collect.ForwardingMap<TypeToken<? extends B>,B>

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

Nested Classes

Modifier and Type	Class and Description
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

Methods

Modifier and Type	Method and Description
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>