com.google.inject.internal

Class RealMultibinder.RealMultibinderProvider<T>

java.lang.Object

com.google.inject.internal.InternalProviderInstanceBindingImpl.Factory<java.util.Set<T>>

com.google.inject.internal.RealMultibinder.RealMultibinderProvider<T>

All Implemented Interfaces:

InternalFactory<java.util.Set<T>>, MultibinderBinding<java.util.Set<T>>, HasDependencies, ProviderWithExtensionVisitor<java.util.Set<T>>, javax.inject.Provider<java.util.Set<T>>

Enclosing class:

RealMultibinder<T>

private static final class RealMultibinder.RealMultibinderProvider<T>
extends InternalProviderInstanceBindingImpl.Factory<java.util.Set<T>>
implements ProviderWithExtensionVisitor<java.util.Set<T>>, MultibinderBinding<java.util.Set<T>>

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.List<Binding<T>>	bindings
private RealMultibinder.BindingSelection<T>	bindingSelection
private SingleParameterInjector<T>[]	injectors
private boolean	permitDuplicates

Fields inherited from class com.google.inject.internal.InternalProviderInstanceBindingImpl.Factory

provisionCallback

Constructor Summary

Constructors

Constructor and Description
RealMultibinderProvider(RealMultibinder.BindingSelection<T> bindingSelection)

Method Summary

Modifier and Type	Method and Description
<B,V> V	acceptExtensionVisitor(BindingTargetVisitor<B,V> visitor, ProviderInstanceBinding<? extends B> binding) Instructs the extension determine if the visitor is an instance of a custom extension visitor, and if so, visit it using that method.
boolean	containsElement(Element element) Returns true if this Multibinder uses the given Element.
protected java.util.Set<T>	doProvision(InternalContext context, Dependency<?> dependency) Creates an object to be injected.
boolean	equals(java.lang.Object obj)
java.util.Set<Dependency<?>>	getDependencies() Returns the known dependencies for this type.
java.util.List<Binding<?>>	getElements() Returns all bindings that make up the set.
TypeLiteral<?>	getElementTypeLiteral() Returns the TypeLiteral that describes the type of elements in the set.
Key<java.util.Set<T>>	getSetKey() Returns the key for the set.
int	hashCode()
(package private) void	initialize(InjectorImpl injector, Errors errors) A callback that allows for implementations to fetch dependencies on other bindings.
private InternalProvisionException	newDuplicateValuesException(com.google.common.collect.ImmutableSet<T> set, T[] values)
private InternalProvisionException	newNullEntryException(int i)
boolean	permitsDuplicates() Returns true if the multibinder permits duplicates.

Methods inherited from class com.google.inject.internal.InternalProviderInstanceBindingImpl.Factory

get, get, getSource

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.google.inject.Provider

get

Field Detail

bindingSelection

private final RealMultibinder.BindingSelection<T> bindingSelection

bindings

private java.util.List<Binding<T>> bindings

injectors

private SingleParameterInjector<T>[] injectors

permitDuplicates

private boolean permitDuplicates

Constructor Detail

RealMultibinderProvider

RealMultibinderProvider(RealMultibinder.BindingSelection<T> bindingSelection)

Method Detail

getDependencies

public java.util.Set<Dependency<?>> getDependencies()

Description copied from interface: HasDependencies

Returns the known dependencies for this type. If this has dependencies whose values are not known statically, a dependency for the Injector will be included in the returned set.

Specified by:

getDependencies in interface HasDependencies

Returns:

a possibly empty set

initialize

void initialize(InjectorImpl injector,
                Errors errors)
         throws ErrorsException

Description copied from class: InternalProviderInstanceBindingImpl.Factory

A callback that allows for implementations to fetch dependencies on other bindings.

Will be called exactly once, prior to any call to InternalProviderInstanceBindingImpl.Factory.doProvision(com.google.inject.internal.InternalContext, com.google.inject.spi.Dependency<?>).

Specified by:

initialize in class InternalProviderInstanceBindingImpl.Factory<java.util.Set<T>>

Throws:

ErrorsException

doProvision

protected java.util.Set<T> doProvision(InternalContext context,
                                       Dependency<?> dependency)
                                throws InternalProvisionException

Description copied from class: InternalProviderInstanceBindingImpl.Factory

Creates an object to be injected.

Specified by:

doProvision in class InternalProviderInstanceBindingImpl.Factory<java.util.Set<T>>

Returns:

instance to be injected

Throws:

InternalProvisionException - if a value cannot be provided

newNullEntryException

private InternalProvisionException newNullEntryException(int i)

acceptExtensionVisitor

public <B,V> V acceptExtensionVisitor(BindingTargetVisitor<B,V> visitor,
                                      ProviderInstanceBinding<? extends B> binding)

Description copied from interface: ProviderWithExtensionVisitor

Instructs the extension determine if the visitor is an instance of a custom extension visitor, and if so, visit it using that method. If the visitor is not an instance of the custom extension visitor, this method MUST call visitor.visit(binding).

Due to issues with generics, the type parameters of this method do not relate to the type of the provider. In practice, the 'B' type will always be a supertype of 'T'.

Specified by:

acceptExtensionVisitor in interface ProviderWithExtensionVisitor<java.util.Set<T>>

newDuplicateValuesException

private InternalProvisionException newDuplicateValuesException(com.google.common.collect.ImmutableSet<T> set,
                                                               T[] values)

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

getSetKey

public Key<java.util.Set<T>> getSetKey()

Description copied from interface: MultibinderBinding

Returns the key for the set.

Specified by:

getSetKey in interface MultibinderBinding<java.util.Set<T>>

getElementTypeLiteral

public TypeLiteral<?> getElementTypeLiteral()

Description copied from interface: MultibinderBinding

Returns the TypeLiteral that describes the type of elements in the set.

The elements will always match the type Set's generic type. For example, if getSetKey returns a key of Set<String>, then this will always return a TypeLiteral<String>.

Specified by:

getElementTypeLiteral in interface MultibinderBinding<java.util.Set<T>>

getElements

public java.util.List<Binding<?>> getElements()

Description copied from interface: MultibinderBinding

Returns all bindings that make up the set. This is only supported on bindings returned from an injector. This will throw UnsupportedOperationException if it is called on an element retrieved from Elements.getElements(com.google.inject.Module...).

The elements will always match the type Set's generic type. For example, if getSetKey returns a key of Set<String>, then this will always return a list of type List<Binding<String>>.

Specified by:

getElements in interface MultibinderBinding<java.util.Set<T>>

permitsDuplicates

public boolean permitsDuplicates()

Description copied from interface: MultibinderBinding

Returns true if the multibinder permits duplicates. This is only supported on bindings returned from an injector. This will throw UnsupportedOperationException if it is called on a MultibinderBinding retrieved from Elements.getElements(com.google.inject.Module...).

Specified by:

permitsDuplicates in interface MultibinderBinding<java.util.Set<T>>

containsElement

public boolean containsElement(Element element)

Description copied from interface: MultibinderBinding

Returns true if this Multibinder uses the given Element. This will be true for bindings that derive the elements of the set and other bindings that Multibinder uses internally. This will work for MultibinderBindings retrieved from an injector and Elements.getElements(com.google.inject.Module...). Usually this is only necessary if you are working with elements retrieved from modules (without an Injector), otherwise MultibinderBinding.getElements() and MultibinderBinding.permitsDuplicates() are better options.

If you need to introspect the details of the set, such as the values or if it permits duplicates, it is necessary to pass the elements through an Injector and use MultibinderBinding.getElements() and MultibinderBinding.permitsDuplicates().

Specified by:

containsElement in interface MultibinderBinding<java.util.Set<T>>