ProviderWithExtensionVisitor

Class Overview

A Provider that is part of an extension which supports a custom BindingTargetVisitor.

When an extension binds a provider instance, the provider can implement this interface to allow users using the acceptTargetVisitor(BindingTargetVisitor) method to visit a custom visitor designed for that extension. A typical implementation within the extension would look like

 
 <V, B> V acceptExtensionVisitor(BindingTargetVisitor<B, V> visitor, ProviderInstanceBinding<? extends B> binding) {
   if(visitor instanceof MyCustomExtensionVisitor) {
     return ((MyCustomExtensionVisitor<B, V>)visitor).visitCustomExtension(customProperties, binding);
   } else {
     return visitor.visit(binding);
   }
 }

'MyCustomExtensionVisitor' in the example above would be an interface the extension provides that users can implement in order to be notified of custom extension information. These visitor interfaces must extend from BindingTargetVisitor.

Summary

Public Methods
abstract <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.

[Expand] Inherited Methods
From interface com.google.inject.Provider abstract T get() Provides an instance of T.
From interface javax.inject.Provider abstract T get()