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.