PHP code example of hjerichen / class-instantiator

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

hjerichen / class-instantiator example snippets

use HJerichen\ClassInstantiator\ClassInstantiator;

class ClassA {

}

class ClassB {
    public function __construct(ClassA $instanceA) {}
}

$instantiator = new ClassInstantiator();
$object = $instantiator->instantiateClass(ClassB::class);

use HJerichen\ClassInstantiator\ClassInstantiator;

class ClassA {
    public function __construct(PDO $database, int $id) {}
}

class ClassB {
    public function __construct(ClassA $instanceA) {}
}

$predefinedArguments = [
    'database' => new PDO('dsn'), 
    'id' => 5
];

$instantiator = new ClassInstantiator();
$object = $instantiator->instantiateClass(ClassB::class, $predefinedArguments);

use HJerichen\ClassInstantiator\ClassInstantiator;

class ClassA {
    public function __construct(PDO $database, int $id) {}
}

class MyInstantiator extends ClassInstantiator {
    # The class instantiator will match the property name to the constructor parameter name
    private $id = 5;
    
    # The class instantiator will match the return type to the constructor parameter type
    public function getDatabase(): PDO
    {
        return new PDO('dsn');
    }
}

$instantiator = new MyInstantiator();
$object = $instantiator->instantiateClass(ClassA::class);

use HJerichen\ClassInstantiator\Attribute\Instantiator;
use HJerichen\ClassInstantiator\ClassInstantiator;

#[Instantiator(class: MyInstantiator::class)]
class ClassA {
    public function __construct(PDO $database, int $id) {}
}

class ClassB {
    public function __construct(ClassA $a) {}
}

class MyInstantiator extends ClassInstantiator {
    # The class instantiator will match the property name to the constructor parameter name
    private $id = 5;
    
    # The class instantiator will match the return type to the constructor parameter type 
    public function getDatabase(): PDO
    {
        return new PDO('dsn');
    }
}

$instantiator = new ClassInstantiator();
$object = $instantiator->instantiateClass(ClassB::class);

use HJerichen\ClassInstantiator\Attribute\Instantiator;
use HJerichen\ClassInstantiator\ClassInstantiator;

#[Instantiator(class: MyInstantiator::class)]
class ClassA {
    public function __construct(PDO $database, int $id) {}
}

class ClassB {
    public function __construct(ClassA $a) {}
}

class MyInstantiator extends ClassInstantiator {    
    # The class instantiator will match the return type to the class type 
    public function buildClassA(): ClassA
    {
        $database = new PDO('dsn');
        return new ClassA($database, 55);
    }
}

$instantiator = new ClassInstantiator();
$object = $instantiator->instantiateClass(ClassB::class);

use HJerichen\ClassInstantiator\Attribute\Instantiator;
use HJerichen\ClassInstantiator\ClassInstantiator;

class ClassA {
    public function __construct(PDO $database, int $id) {}
}

class ClassB {
    public function __construct(
        #[Instantiator(class: MyInstantiator::class)] ClassA $a
    ) {
    }
}

class MyInstantiator extends ClassInstantiator {    
    # The class instantiator will match the return type to the class type 
    public function buildClassA(): ClassA
    {
        $database = new PDO('dsn');
        return new ClassA($database, 55);
    }
}

$instantiator = new ClassInstantiator();
$object = $instantiator->instantiateClass(ClassB::class);

use HJerichen\ClassInstantiator\Attribute\Instantiator;
use HJerichen\ClassInstantiator\ClassInstantiator;

class ClassA {
    public function __construct(PDO $database, int $id) {}
}

class ClassB {
    public function __construct(
        #[Instantiator(class: MyInstantiator::class, method: 'someMethod')] ClassA $a
    ) {
    }
}

class MyInstantiator extends ClassInstantiator {    
    # The class instantiator will not use this method to build a ClassA insance. 
    public function buildClassA(): ClassA
    {
        $database = new PDO('dsn');
        return new ClassA($database, 55);
    }
    # Is uses this method, because is is specified in the attribute.
    public function someMethod(): ClassA
    {
        $database = new PDO('dsn');
        return new ClassA($database, 60);
    }
}

$instantiator = new ClassInstantiator();
$object = $instantiator->instantiateClass(ClassB::class);

use HJerichen\ClassInstantiator\Attribute\Instantiator;

 #[Instantiator(class: MyInstantiator::class, store: true)]
class ClassA {
    public function __construct(PDO $database, int $id) {}
}

use HJerichen\ClassInstantiator\ClassInstantiator;

interface InterfaceA {}
class ClassA implements InterfaceA {}

$instantiator = new ClassInstantiator();

# only using the object resolves to this object when exactly this class is requested
$instantiator->injectObject(new ClassA());
$object = $instantiator->instantiateClass(ClassA::class);

# using the object and an interface as second parameter
# resolves to this object when exactly this interface is requested
$instantiator->injectObject(new ClassA(), InterfaceA::class);
$object = $instantiator->instantiateClass(InterfaceA::class);

use HJerichen\ClassInstantiator\ClassInstantiator;
use HJerichen\ClassInstantiator\ClassInstantiatorContainer;
use TheCodingMachine\GraphQLite\SchemaFactory;

# you can also inject an extension.
$container = new ClassInstantiatorContainer(new ClassInstantiator()); 
$factory = new SchemaFactory($cache, $container);