<?php
 
 namespace Illuminate\Container;
 
 use Illuminate\Support\Arr;
 use Illuminate\Contracts\Container\Container;
 use Illuminate\Contracts\Container\ContextualBindingBuilder as ContextualBindingBuilderContract;
 
 class ContextualBindingBuilder implements ContextualBindingBuilderContract
 {
     /**
      * The underlying container instance.
      *
      * @var \Illuminate\Contracts\Container\Container
      */
     protected $container;
 
     /**
      * The concrete instance.
      *
      * @var string|array
      */
     protected $concrete;
 
     /**
      * The abstract target.
      *
      * @var string
      */
     protected $needs;
 
     /**
      * Create a new contextual binding builder.
      *
      * @param  \Illuminate\Contracts\Container\Container  $container
      * @param  string|array  $concrete
      * @return void
      */
     public function __construct(Container $container, $concrete)
     {
         $this->concrete = $concrete;
         $this->container = $container;
     }
 
     /**
      * Define the abstract target that depends on the context.
      *
      * @param  string  $abstract
      * @return $this
      */
     public function needs($abstract)
     {
         $this->needs = $abstract;
 
         return $this;
     }
 
     /**
      * Define the implementation for the contextual binding.
      *
      * @param  \Closure|string  $implementation
      * @return void
      */
     public function give($implementation)
     {
         foreach (Arr::wrap($this->concrete) as $concrete) {
             $this->container->addContextualBinding($concrete, $this->needs, $implementation);
         }
     }
 }