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<?php
declare(strict_types=1);
namespace Laminas\Di\Resolver;
use Laminas\Di\Exception\LogicException;
use Psr\Container\ContainerInterface;
/**
* Encapsulates the injection to perform for a parameter
*
* Implementations of this class will handle how the resolved dependency is provided and how (if possible) it can
* be generated to PHP code for AoT compilation.
*
* For example the `TypeInjection`, that implements this interface, handles when the injection resolves to a specific
* type. It will provide the injection with help of the di container. `ValueInjection` on the other hand handles
* when a concrete value or instance should be injected.
*
* `DependencyResolverInterface::resolveParameters()` will provide an instance of this type for each injection.
* `InjectorInterface` implementations will use these to obtain the actual injection value with `toValue()` while code
* generators will use it to generate a factory.
*
* @internal
*
* @see DependencyResolverInterface::resolveParameters() The resolver method's return type
* @see \Laminas\Di\Injector::getInjectionValue() The default injector implementation
* @see TypeInjection Implementation for injecting an instance of a specific type
* @see ValueInjection Implementation for injecting an existing value
*/
interface InjectionInterface
{
/**
* Provides the actual value for injection, that will be passed to the constructor
*
* Implementations may utilize the provided ioc container to fulfill this purpose.
*
* @return mixed The resulting injection value
*/
public function toValue(ContainerInterface $container);
/**
* Export the injection to PHP code
*
* This will be used by code generators to provide AoT factories
*
* @throws LogicException When the injection is not exportable.
*/
public function export(): string;
/**
* Whether this injection can be exported as code or not
*
* Implementations may use this method to indicate if they may be exported to PHP code. This may not be possible
* in some situations, for example when the injection is a `resource` that cannot be provided with a piece
* of PHP code.
*
* When this method returns false, a call to `export()` should throw a
* `Laminas\Di\Exception\LogicException`
*/
public function isExportable(): bool;
}