org.elasticsearch.common.inject.multibindings

Class MapBinder.RealMapBinder<K,V>

java.lang.Object

org.elasticsearch.common.inject.multibindings.MapBinder<K,V>

org.elasticsearch.common.inject.multibindings.MapBinder.RealMapBinder<K,V>

All Implemented Interfaces:

Module

Enclosing class:

MapBinder<K,V>

public static final class MapBinder.RealMapBinder<K,V>
extends MapBinder<K,V>
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. It uses the entry set multibinder to construct the map and the provider map.

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.

We use a subclass to hide 'implements Module' from the public API.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MapBinder.RealMapBinder.MapBinderProviderWithDependencies<K,V>

Nested classes/interfaces inherited from class org.elasticsearch.common.inject.multibindings.MapBinder

MapBinder.RealMapBinder<K,V>

Method Summary

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(java.lang.Object o)
int	hashCode()

Methods inherited from class org.elasticsearch.common.inject.multibindings.MapBinder

newMapBinder, newMapBinder, newMapBinder, newMapBinder, newMapBinder, newMapBinder

Methods inherited from class java.lang.Object

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

Method Detail

addBinding

public LinkedBindingBuilder<V> addBinding(K key)

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

Specified by:

addBinding in class MapBinder<K,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(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object