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Completed
Push — master ( a051a7...500db5 )
by Matthieu
02:31
created

SelfResolver   A

↳ Parent: Project

Coupling/Cohesion

Components 0
Dependencies 0

Complexity

Total Complexity 3

Size/Duplication

Total Lines 32
Duplicated Lines 0 %

Importance

Changes 1
Bugs 0 Features 0
Metric Value
wmc 3
c 1
b 0
f 0
lcom 0
cbo 0
dl 0
loc 32
rs 10

3 Methods

Rating   Name   Duplication   Size   Complexity  
A __construct() 0 4 1
A resolve() 0 4 1
A isResolvable() 0 4 1
1 
<?php
2 

            


            
                                                                                                            
                            
            
                                    
            
            

                
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namespace DI\Definition\Resolver;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use DI\Definition\Definition;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use DI\Definition\SelfResolvingDefinition;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use Interop\Container\ContainerInterface;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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/**

            


            
                                                                                                            
                            
            
                                    
            
            

                
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 * Resolves self-resolving definitions.

            


            
                                                                                                            
                            
            
                                    
            
            

                
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 *

            


            
                                                                                                            
                            
            
                                    
            
            

                
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 * @since 5.3

            


            
                                                                                                            
                            
            
                                    
            
            

                
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 * @author Matthieu Napoli <[email protected]>

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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 */

            


            
                                                                        
                            
            
                                    
            
            

                
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class SelfResolver implements DefinitionResolver

            


            
                                                                        
                            
            
                                    
            
            

                
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{

            


            
                                                                        
                            
            
                                    
            
            

                
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    /**

            


            
                                                                        
                            
            
                                    
            
            

                
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     * @var ContainerInterface

            


            
                                                                        
                            
            
                                    
            
            

                
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     */

            


            
                                                                        
                            
            
                                    
            
            

                
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    private $container;

            


            
                                                                        
                            
            
                                    
            
            

                
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    public function __construct(ContainerInterface $container)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $this->container = $container;

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    }

            


            
                                                                        
                            
            
                                    
            
            

                
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    /**

            


            
                                                                        
                            
            
                                    
            
            

                
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     * @param SelfResolvingDefinition $definition

            


            
                                                                        
                            
            
                                    
            
            

                
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     *

            


            
                                                                        
                            
            
                                    
            
            

                
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     * [email protected]}

            


            
                                                                        
                            
            
                                    
            
            

                
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     */

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public function resolve(Definition $definition, array $parameters = [])

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        return $definition->resolve($this->container);

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
0 ignored issues

                            –
                            show
                        


                        

                                                                                        




    

        
            Bug
    
    
    
        introduced 
                            by Matthieu Napoli
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
It seems like you code against a concrete implementation and not the interface DI\Definition\Definition as the method resolve() does only exist in the following implementations of said interface: DI\Definition\AliasDefinition, DI\Definition\StringDefinition, DI\Definition\ValueDefinition.
                                                                                                                                                                                                        

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
Let’s take a look at an example:


interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}





In the above example, the authenticate() method works fine as long as you just pass
instances of MyUser. However, if you now also want to pass a different implementation
of User which does not have a getDisplayName() method, the code will break.




Available Fixes


  1. Change the type-hint for the parameter:
    

    class AuthSystem
{
    public function authenticate(MyUser $user) { /* ... */ }
}

    

    

    2. 

  2. Add an additional type-check:
    

    class AuthSystem
{
    public function authenticate(User $user)
    {
        if ($user instanceof MyUser) {
            $this->logger->info(/** ... */);
        }

        // or alternatively
        if ( ! $user instanceof MyUser) {
            throw new \LogicException(
                '$user must be an instance of MyUser, '
               .'other instances are not supported.'
            );
        }

    }
}

    

    

    3. 




 Note: PHP Analyzer uses reverse abstract interpretation to narrow down the types
inside the if block in such a case.


  1. Add the method to the interface:
    

    interface User
{
    /** @return string */
    public function getPassword();

    /** @return string */
    public function getDisplayName();
}

    

    

    2. 



                        

                                                    

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    }

            


            
                                                                        
                            
            
                                    
            
            

                
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    /**

            


            
                                                                        
                            
            
                                    
            
            

                
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     * @param SelfResolvingDefinition $definition

            


            
                                                                        
                            
            
                                    
            
            

                
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     *

            


            
                                                                        
                            
            
                                    
            
            

                
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     * [email protected]}

            


            
                                                                        
                            
            
                                    
            
            

                
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     */

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public function isResolvable(Definition $definition, array $parameters = [])

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        return $definition->isResolvable($this->container);

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
0 ignored issues

                            –
                            show
                        


                        

                                                                                        




    

        
            Bug
    
    
    
        introduced 
                            by Matthieu Napoli
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
It seems like you code against a concrete implementation and not the interface DI\Definition\Definition as the method isResolvable() does only exist in the following implementations of said interface: DI\Definition\AliasDefinition, DI\Definition\StringDefinition, DI\Definition\ValueDefinition.
                                                                                                                                                                                                        

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
Let’s take a look at an example:


interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}





In the above example, the authenticate() method works fine as long as you just pass
instances of MyUser. However, if you now also want to pass a different implementation
of User which does not have a getDisplayName() method, the code will break.




Available Fixes


  1. Change the type-hint for the parameter:
    

    class AuthSystem
{
    public function authenticate(MyUser $user) { /* ... */ }
}

    

    

    2. 

  2. Add an additional type-check:
    

    class AuthSystem
{
    public function authenticate(User $user)
    {
        if ($user instanceof MyUser) {
            $this->logger->info(/** ... */);
        }

        // or alternatively
        if ( ! $user instanceof MyUser) {
            throw new \LogicException(
                '$user must be an instance of MyUser, '
               .'other instances are not supported.'
            );
        }

    }
}

    

    

    3. 




 Note: PHP Analyzer uses reverse abstract interpretation to narrow down the types
inside the if block in such a case.


  1. Add the method to the interface:
    

    interface User
{
    /** @return string */
    public function getPassword();

    /** @return string */
    public function getDisplayName();
}

    

    

    2. 



                        

                                                    

                     Loading history...
                

                    


    




                                                                                    


                    		
                

            
                                                                                                            
                                                                
            
                                    
            
            

                
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    }

            


            
                                                        
            
                                    
            
            

                
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}

            


            
                                                        
            
                                    
            
            

                
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