Package com.google.common.collect

Class ImmutableClassToInstanceMap<B>

java.lang.Object

com.google.common.collect.ForwardingObject

com.google.common.collect.ForwardingMap<java.lang.Class<? extends B>,B>

com.google.common.collect.ImmutableClassToInstanceMap<B>

All Implemented Interfaces:

ClassToInstanceMap<B>, java.util.Map<java.lang.Class<? extends B>,B>

public final class ImmutableClassToInstanceMap<B>
extends ForwardingMap<java.lang.Class<? extends B>,B>
implements ClassToInstanceMap<B>

A class-to-instance map backed by an ImmutableMap. See also MutableClassToInstanceMap.

Since:

2.0 (imported from Google Collections Library)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ImmutableClassToInstanceMap.Builder<B>	A builder for creating immutable class-to-instance maps.

Nested classes/interfaces inherited from interface java.util.Map

java.util.Map.Entry<K extends java.lang.Object,V extends java.lang.Object>

Method Summary

Modifier and Type	Method	Description
static <B> ImmutableClassToInstanceMap.Builder<B>	builder()	Returns a new builder.
static <B,S extends B> ImmutableClassToInstanceMap<B>	copyOf(java.util.Map<? extends java.lang.Class<? extends S>,? extends S> map)	Returns an immutable map containing the same entries as map.
<T extends B> T	getInstance(java.lang.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	putInstance(java.lang.Class<T> type, T value)	Deprecated. Unsupported operation.

Methods inherited from class com.google.common.collect.ForwardingMap

clear, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, put, putAll, remove, size, values

Methods inherited from class com.google.common.collect.ForwardingObject

toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

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

Method Detail

builder

public static <B> ImmutableClassToInstanceMap.Builder<B> builder()

Returns a new builder. The generated builder is equivalent to the builder created by the ImmutableClassToInstanceMap.Builder constructor.

copyOf

public static <B,S extends B> ImmutableClassToInstanceMap<B> copyOf(java.util.Map<? extends java.lang.Class<? extends S>,? extends S> map)

Returns an immutable map containing the same entries as map. If map somehow contains entries with duplicate keys (for example, if it is a SortedMap whose comparator is not consistent with equals), the results of this method are undefined.

Note: Despite what the method name suggests, if map is an ImmutableClassToInstanceMap, no copy will actually be performed.

Throws:

java.lang.NullPointerException - if any key or value in map is null

java.lang.ClassCastException - if any value is not an instance of the type specified by its key

getInstance

@Nullable
public <T extends B> T getInstance(java.lang.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 interface ClassToInstanceMap<B>

putInstance

@Deprecated
public <T extends B> T putInstance(java.lang.Class<T> type,
                                   T value)

Deprecated.

Unsupported operation.

Guaranteed to throw an exception and leave the map unmodified.

Specified by:

putInstance in interface ClassToInstanceMap<B>

Returns:

the value previously associated with this class (possibly null), or null if there was no previous entry.

Throws:

java.lang.UnsupportedOperationException - always