com.google.inject.internal

Class RealMapBinder<K,V>

java.lang.Object

com.google.inject.internal.RealMapBinder<K,V>

All Implemented Interfaces:

Module

public final class RealMapBinder<K,V>
extends Object
implements Module

The actual mapbinder plays several roles:

As a MapBinder, it acts as a factory for LinkedBindingBuilders for each of the map's values. It delegates to a Multibinder of entries (keys to value providers).

As a Module, it installs the binding to the map itself, as well as to a corresponding map whose values are providers.

As a module, this implements equals() and hashcode() in order to trick Guice into executing its configure() method only once. That makes it so that multiple mapbinders can be created for the same target map, but only one is bound. Since the list of bindings is retrieved from the injector itself (and not the mapbinder), each mapbinder has access to all contributions from all equivalent mapbinders.

Rather than binding a single Map.Entry<K, V>, the map binder binds keys and values independently. This allows the values to be properly scoped.

Method Summary

Methods

Modifier and Type	Method and Description
LinkedBindingBuilder<V>	addBinding(K key) This creates two bindings.
void	configure(Binder binder) Contributes bindings and other configurations for this module to binder.
boolean	equals(Object o)
int	hashCode()
static <K,V> RealMapBinder<K,V>	newMapRealBinder(Binder binder, TypeLiteral<K> keyType, TypeLiteral<V> valueType) Returns a new mapbinder that collects entries of keyType/valueType in a Map that is itself bound with no binding annotation.
static <K,V> RealMapBinder<K,V>	newRealMapBinder(Binder binder, TypeLiteral<K> keyType, TypeLiteral<V> valueType, Annotation annotation) Returns a new mapbinder that collects entries of keyType/valueType in a Map that is itself bound with annotation.
static <K,V> RealMapBinder<K,V>	newRealMapBinder(Binder binder, TypeLiteral<K> keyType, TypeLiteral<V> valueType, Class<? extends Annotation> annotationType) Returns a new mapbinder that collects entries of keyType/valueType in a Map that is itself bound with annotationType.
void	permitDuplicates()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Method Detail

newMapRealBinder

public static <K,V> RealMapBinder<K,V> newMapRealBinder(Binder binder,
                                        TypeLiteral<K> keyType,
                                        TypeLiteral<V> valueType)

Returns a new mapbinder that collects entries of keyType/valueType in a Map that is itself bound with no binding annotation.

newRealMapBinder

public static <K,V> RealMapBinder<K,V> newRealMapBinder(Binder binder,
                                        TypeLiteral<K> keyType,
                                        TypeLiteral<V> valueType,
                                        Annotation annotation)

Returns a new mapbinder that collects entries of keyType/valueType in a Map that is itself bound with annotation.

newRealMapBinder

public static <K,V> RealMapBinder<K,V> newRealMapBinder(Binder binder,
                                        TypeLiteral<K> keyType,
                                        TypeLiteral<V> valueType,
                                        Class<? extends Annotation> annotationType)

Returns a new mapbinder that collects entries of keyType/valueType in a Map that is itself bound with annotationType.

permitDuplicates

public void permitDuplicates()

addBinding

public LinkedBindingBuilder<V> addBinding(K key)

This creates two bindings. One for the Map.Entry<K, Provider<V>> and another for V.

configure

public void configure(Binder binder)

Description copied from interface: Module

Contributes bindings and other configurations for this module to binder.

Do not invoke this method directly to install submodules. Instead use Binder.install(Module), which ensures that provider methods are discovered.

Specified by:

configure in interface Module

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object