README

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The Thruster Container Component. Container is small self contained dependency injection container implementing ContainerInterface interface.

Install

Via Composer

$ composer require thruster/container

Usage

Just create instance of Container:

<?php

use Thruster\Component\Container;

$container = new Container();

Also you can pass preset array of values to constructor.

<?php

use Thruster\Component\Container;

$values = [
	'render.engine' => function ($container) {
		return new RenderEngine($container->get('translation.engine'));
	},
	'translation.engine' => function () {
		return new TranslationEngine();
	}
];

$container = new Container($values);

Container has a bunch of simple named functions to use container: has, set, get, remove:

<?php

use Thruster\Component\Container;

$container = new Container();

$container->has('render.engine'); // = false
$container->set('render.engine', function ($container) {
		return new RenderEngine($container->get('translation.engine'));
});

$container->has('render.engine'); // = true

$renderEngine = $container->get('render.engine');

$container->remove('render.engine');
$container->has('render.engine'); // = false

Container also support \ArrayAccess

<?php

use Thruster\Component\Container;

$container = new Container();

isset($container['render.engine']); // = false
$container['render.engine'] = function ($container) {
		return new RenderEngine($container->get('translation.engine'));
};

isset($container['render.engine']); // = true

$renderEngine = $container['render.engine'];

unset($container['render.engine']);
isset($container['render.engine']); // = false

By default Container always returns the same instance of identifier, but you can create a factory definition which will return always new instance of identifier.

<?php

use Thruster\Component\Container;

$container = new Container();

$i = 1;

$value = function () use ($i) {
	return $i++;
}

$factoryValue = function () use (&$i) {
	return $i++;
}

$container->set('normal', $value);

$container->get('normal'); // = 1
$container->get('normal'); // = 1

$container->set('factory', $factoryValue);

$container->get('factory'); // = 1
$container->get('factory'); // = 2

Container provides a way to extend container with ContainerProviderInterface

<?php

use Thruster\Component\Container;
use Thruster\Component\ContainerProviderInterface;

$container = new Container();

$provider = new class implements ContainerProviderInterface {
	public function register(Container $container)
	{
		$container->set(....);
	}
};

$container->addProvider($provider);

Errors

• Container throws NotFoundException if identifier is not found in container.
• Container throws IdentifierFrozenException when trying to set definition for already frozen identifier. (Frozen means when value was already used once)

Testing

$ composer test

Contributing

Please see CONTRIBUTING and CONDUCT for details.

License

Please see License File for more information.