java.lang.Object
- com.google.inject.internal.InternalProviderInstanceBindingImpl.Factory<P>
- - com.google.inject.internal.RealOptionalBinder.RealOptionalBinderProviderWithDependencies<T,java.util.Optional<T>>
  - - com.google.inject.internal.RealOptionalBinder.JavaOptionalProvider<T>

All Implemented Interfaces:

InternalFactory<java.util.Optional<T>>, OptionalBinderBinding<java.util.Optional<T>>, Provider<java.util.Optional<T>>, HasDependencies, ProviderWithExtensionVisitor<java.util.Optional<T>>, javax.inject.Provider<java.util.Optional<T>>

Enclosing class:

RealOptionalBinder<T>
```
private static final class RealOptionalBinder.JavaOptionalProvider<T>
extends RealOptionalBinder.RealOptionalBinderProviderWithDependencies<T,java.util.Optional<T>>
implements ProviderWithExtensionVisitor<java.util.Optional<T>>, OptionalBinderBinding<java.util.Optional<T>>
```
Provides the binding for java.util.Optional.

Field Summary

Fields
Modifier and Type Field Description

private Key<java.util.Optional<T>> optionalKey

private InternalFactory<? extends T> target

private Dependency<?> targetDependency
- Fields inherited from class com.google.inject.internal.RealOptionalBinder.RealOptionalBinderProviderWithDependencies
  bindingSelection
- Fields inherited from class com.google.inject.internal.InternalProviderInstanceBindingImpl.Factory
  provisionCallback

Constructor Summary

Constructors
Constructor Description

JavaOptionalProvider(RealOptionalBinder.BindingSelection<T> bindingSelection, Key<java.util.Optional<T>> optionalKey)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`<B,R> R`	`acceptExtensionVisitor(BindingTargetVisitor<B,R> 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 OptionalBinder contains the given Element in order to build the optional binding or uses the given Element in order to support building and injecting its data.
`(package private) void`	`doInitialize()`	Initialize the factory.
`protected java.util.Optional<T>`	`doProvision(InternalContext context, Dependency<?> currentDependency)`	Creates an object to be injected.
`Binding<?>`	`getActualBinding()`	Returns the actual binding (set by `OptionalBinder.setBinding()`) or null if not set.
`java.util.Set<Key<?>>`	`getAlternateKeys()`	Returns the keys of other bindings that represent this OptionalBinder.
`Binding<?>`	`getDefaultBinding()`	Returns the default binding (set by `OptionalBinder.setDefault()`) if one exists or null if no default binding is set.
`java.util.Set<Dependency<?>>`	`getDependencies()`	Returns the known dependencies for this type.
`Key<java.util.Optional<T>>`	`getKey()`	Returns the `Key` for this binding.

Methods inherited from class com.google.inject.internal.RealOptionalBinder.RealOptionalBinderProviderWithDependencies
equals, hashCode, initialize

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
  - optionalKey
```
private final Key<java.util.Optional<T>> optionalKey
```
  - targetDependency
```
private Dependency<?> targetDependency
```
  - target
```
private InternalFactory<? extends T> target
```
- Constructor Detail
  - JavaOptionalProvider
```
JavaOptionalProvider(RealOptionalBinder.BindingSelection<T> bindingSelection,
                     Key<java.util.Optional<T>> optionalKey)
```
- Method Detail
  - doInitialize
```
void doInitialize()
```
    Description copied from class: RealOptionalBinder.RealOptionalBinderProviderWithDependencies
    
    Initialize the factory. BindingSelection is guaranteed to be initialized at this point and this will be called prior to any provisioning.
    
    Specified by:
    
    doInitialize in class RealOptionalBinder.RealOptionalBinderProviderWithDependencies<T,java.util.Optional<T>>
  - doProvision
```
protected java.util.Optional<T> doProvision(InternalContext context,
                                            Dependency<?> currentDependency)
                                     throws InternalProvisionException
```
    Description copied from class: InternalProviderInstanceBindingImpl.Factory
    
    Creates an object to be injected.
    
    Specified by:
    
    doProvision in class InternalProviderInstanceBindingImpl.Factory<java.util.Optional<T>>
    
    Returns:
    
    instance to be injected
    
    Throws:
    
    InternalProvisionException - if a value cannot be provided
  - 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
  - acceptExtensionVisitor
```
public <B,R> R acceptExtensionVisitor(BindingTargetVisitor<B,R> 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<T>
  - containsElement
```
public boolean containsElement(Element element)
```
    Description copied from interface: OptionalBinderBinding
    
    Returns true if this OptionalBinder contains the given Element in order to build the optional binding or uses the given Element in order to support building and injecting its data. This will work for OptionalBinderBinding 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 OptionalBinderBinding.getDefaultBinding() and OptionalBinderBinding.getActualBinding() are better options.
    
    Specified by:
    
    containsElement in interface OptionalBinderBinding<T>
  - getActualBinding
```
public Binding<?> getActualBinding()
```
    Description copied from interface: OptionalBinderBinding
    
    Returns the actual binding (set by OptionalBinder.setBinding()) or null if not set. This will throw UnsupportedOperationException if it is called on an element retrieved from Elements.getElements(com.google.inject.Module...).
    The Binding's type will always match the type Optional's generic type. For example, if getKey returns a key of Optional<String>, then this will always return a Binding<String>.
    
    Specified by:
    
    getActualBinding in interface OptionalBinderBinding<T>
  - getDefaultBinding
```
public Binding<?> getDefaultBinding()
```
    Description copied from interface: OptionalBinderBinding
    
    Returns the default binding (set by OptionalBinder.setDefault()) if one exists or null if no default binding is set. This will throw UnsupportedOperationException if it is called on an element retrieved from Elements.getElements(com.google.inject.Module...).
    The Binding's type will always match the type Optional's generic type. For example, if getKey returns a key of Optional<String>, then this will always return a Binding<String>.
    
    Specified by:
    
    getDefaultBinding in interface OptionalBinderBinding<T>
  - getKey
```
public Key<java.util.Optional<T>> getKey()
```
    Description copied from interface: OptionalBinderBinding
    
    Returns the Key for this binding.
    
    Specified by:
    
    getKey in interface OptionalBinderBinding<T>
  - getAlternateKeys
```
public java.util.Set<Key<?>> getAlternateKeys()
```
    Description copied from interface: OptionalBinderBinding
    
    Returns the keys of other bindings that represent this OptionalBinder. This will return an entry for Optional<com.google.inject.Provider<V>> and Optional<javax.inject.Provider<V>>.
    
    Specified by:
    
    getAlternateKeys in interface OptionalBinderBinding<T>

Modifier and Type	Field	Description
`private Key<java.util.Optional<T>>`	`optionalKey`
`private InternalFactory<? extends T>`	`target`
`private Dependency<?>`	`targetDependency`

Class RealOptionalBinder.JavaOptionalProvider<T>

Field Summary

Fields inherited from class com.google.inject.internal.RealOptionalBinder.RealOptionalBinderProviderWithDependencies

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

Constructor Summary

Method Summary

Methods inherited from class com.google.inject.internal.RealOptionalBinder.RealOptionalBinderProviderWithDependencies

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

Methods inherited from class java.lang.Object

Methods inherited from interface com.google.inject.Provider

Field Detail

optionalKey

targetDependency

target

Constructor Detail

JavaOptionalProvider

Method Detail

doInitialize

doProvision

getDependencies

acceptExtensionVisitor

containsElement

getActualBinding

getDefaultBinding

getKey

getAlternateKeys