Package com.google.inject.internal

Class Indexer

java.lang.Object

com.google.inject.spi.DefaultBindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

com.google.inject.internal.Indexer

All Implemented Interfaces:

BindingScopingVisitor<java.lang.Object>, BindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

class Indexer
extends DefaultBindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>
implements BindingScopingVisitor<java.lang.Object>

Visits bindings to return a IndexedBinding that can be used to emulate the binding deduplication that Guice internally performs.

Note: simply using equals/hashCode on the BindingImpls doesn't work because they all have unique annotations. This works around that by reimplementing equality semantics that ignores Element.uniqueId(). A better solution might be to introduce the idea of an 'anonymous' binding to guice, that might support this usecase directly.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static class	Indexer.BindingType
(package private) static class	Indexer.IndexedBinding

Field Summary

Fields

Modifier and Type	Field	Description
private static java.lang.Object	EAGER_SINGLETON
(package private) Injector	injector

Constructor Summary

Constructors

Constructor	Description
Indexer(Injector injector)

Method Summary

Modifier and Type	Method	Description
(package private) boolean	isIndexable(Binding<?> binding)
private java.lang.Object	scope(Binding<?> binding)
Indexer.IndexedBinding	visit(ConstructorBinding<? extends java.lang.Object> binding)	Visit a constructor binding.
Indexer.IndexedBinding	visit(ConvertedConstantBinding<? extends java.lang.Object> binding)	Visit a binding created from converting a bound instance to a new type.
Indexer.IndexedBinding	visit(ExposedBinding<? extends java.lang.Object> binding)	Visit a binding to a key exposed from an enclosed private environment.
Indexer.IndexedBinding	visit(InstanceBinding<? extends java.lang.Object> binding)	Visit a instance binding.
Indexer.IndexedBinding	visit(LinkedKeyBinding<? extends java.lang.Object> binding)	Visit a linked key binding.
Indexer.IndexedBinding	visit(ProviderBinding<? extends java.lang.Object> binding)	Visit a binding to a Provider that delegates to the binding for the provided type.
Indexer.IndexedBinding	visit(ProviderInstanceBinding<? extends java.lang.Object> binding)	Visit a provider instance binding.
Indexer.IndexedBinding	visit(ProviderKeyBinding<? extends java.lang.Object> binding)	Visit a provider key binding.
Indexer.IndexedBinding	visit(UntargettedBinding<? extends java.lang.Object> binding)	Visit an untargetted binding.
java.lang.Object	visitEagerSingleton()	Visit an eager singleton or single instance.
java.lang.Object	visitNoScoping()	Visit an unspecified or unscoped strategy.
java.lang.Object	visitScope(Scope scope)	Visit a scope instance.
java.lang.Object	visitScopeAnnotation(java.lang.Class<? extends java.lang.annotation.Annotation> scopeAnnotation)	Visit a scope annotation.

Methods inherited from class com.google.inject.spi.DefaultBindingTargetVisitor

visitOther

Methods inherited from class java.lang.Object

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

Field Detail

injector

final Injector injector

EAGER_SINGLETON

private static final java.lang.Object EAGER_SINGLETON

Constructor Detail

Indexer

Indexer(Injector injector)

Method Detail

isIndexable

boolean isIndexable(Binding<?> binding)

scope

private java.lang.Object scope(Binding<?> binding)

visit

public Indexer.IndexedBinding visit(ConstructorBinding<? extends java.lang.Object> binding)

Description copied from interface: BindingTargetVisitor

Visit a constructor binding. To resolve injections, an instance is instantiated by invoking constructor. This target is found only on injector bindings.

Specified by:

visit in interface BindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

Overrides:

visit in class DefaultBindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

visit

public Indexer.IndexedBinding visit(ConvertedConstantBinding<? extends java.lang.Object> binding)

Description copied from interface: BindingTargetVisitor

Visit a binding created from converting a bound instance to a new type. The source binding has the same binding annotation but a different type. This target is found only on injector bindings.

Specified by:

visit in interface BindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

Overrides:

visit in class DefaultBindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

visit

public Indexer.IndexedBinding visit(ExposedBinding<? extends java.lang.Object> binding)

Description copied from interface: BindingTargetVisitor

Visit a binding to a key exposed from an enclosed private environment. This target is only found in injector bindings.

Specified by:

visit in interface BindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

Overrides:

visit in class DefaultBindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

visit

public Indexer.IndexedBinding visit(InstanceBinding<? extends java.lang.Object> binding)

Description copied from interface: BindingTargetVisitor

Visit a instance binding. The same instance is returned for every injection. This target is found in both module and injector bindings.

Specified by:

visit in interface BindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

Overrides:

visit in class DefaultBindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

visit

public Indexer.IndexedBinding visit(LinkedKeyBinding<? extends java.lang.Object> binding)

Description copied from interface: BindingTargetVisitor

Visit a linked key binding. The other key's binding is used to resolve injections. This target is found in both module and injector bindings.

Specified by:

visit in interface BindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

Overrides:

visit in class DefaultBindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

visit

public Indexer.IndexedBinding visit(ProviderBinding<? extends java.lang.Object> binding)

Description copied from interface: BindingTargetVisitor

Visit a binding to a Provider that delegates to the binding for the provided type. This target is found only on injector bindings.

Specified by:

visit in interface BindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

Overrides:

visit in class DefaultBindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

visit

public Indexer.IndexedBinding visit(ProviderInstanceBinding<? extends java.lang.Object> binding)

Description copied from interface: BindingTargetVisitor

Visit a provider instance binding. The provider's get method is invoked to resolve injections. This target is found in both module and injector bindings.

Specified by:

visit in interface BindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

Overrides:

visit in class DefaultBindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

visit

public Indexer.IndexedBinding visit(ProviderKeyBinding<? extends java.lang.Object> binding)

Description copied from interface: BindingTargetVisitor

Visit a provider key binding. To resolve injections, the provider key is first resolved, then that provider's get method is invoked. This target is found in both module and injector bindings.

Specified by:

visit in interface BindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

Overrides:

visit in class DefaultBindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

visit

public Indexer.IndexedBinding visit(UntargettedBinding<? extends java.lang.Object> binding)

Description copied from interface: BindingTargetVisitor

Visit an untargetted binding. This target is found only on module bindings. It indicates that the injector should use its implicit binding strategies to resolve injections.

Specified by:

visit in interface BindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

Overrides:

visit in class DefaultBindingTargetVisitor<java.lang.Object,Indexer.IndexedBinding>

visitEagerSingleton

public java.lang.Object visitEagerSingleton()

Description copied from interface: BindingScopingVisitor

Visit an eager singleton or single instance. This scope strategy is found on both module and injector bindings.

Specified by:

visitEagerSingleton in interface BindingScopingVisitor<java.lang.Object>

visitNoScoping

public java.lang.Object visitNoScoping()

Description copied from interface: BindingScopingVisitor

Visit an unspecified or unscoped strategy. On a module, this strategy indicates that the injector should use scoping annotations to find a scope. On an injector, it indicates that no scope is applied to the binding. An unscoped binding will behave like a scoped one when it is linked to a scoped binding.

Specified by:

visitNoScoping in interface BindingScopingVisitor<java.lang.Object>

visitScope

public java.lang.Object visitScope(Scope scope)

Description copied from interface: BindingScopingVisitor

Visit a scope instance. This scope strategy is found on both module and injector bindings.

Specified by:

visitScope in interface BindingScopingVisitor<java.lang.Object>

visitScopeAnnotation

public java.lang.Object visitScopeAnnotation(java.lang.Class<? extends java.lang.annotation.Annotation> scopeAnnotation)

Description copied from interface: BindingScopingVisitor

Visit a scope annotation. This scope strategy is found only on module bindings. The instance that implements this scope is registered by Binder.bindScope().

Specified by:

visitScopeAnnotation in interface BindingScopingVisitor<java.lang.Object>