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<?php
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declare(strict_types=1);
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namespace DI\Definition\Resolver;
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use DI\Definition\ArrayDefinition;
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use DI\Definition\DecoratorDefinition;
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use DI\Definition\Definition;
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use DI\Definition\EnvironmentVariableDefinition;
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use DI\Definition\Exception\InvalidDefinition;
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use DI\Definition\FactoryDefinition;
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use DI\Definition\InstanceDefinition;
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use DI\Definition\ObjectDefinition;
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use DI\Definition\SelfResolvingDefinition;
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use DI\Proxy\ProxyFactory;
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use Psr\Container\ContainerInterface;
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/**
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* Dispatches to more specific resolvers.
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*
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* Dynamic dispatch pattern.
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*
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* @since 5.0
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* @author Matthieu Napoli <matthieu@mnapoli.fr>
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*/
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class ResolverDispatcher implements DefinitionResolver
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{
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private ?ArrayResolver $arrayResolver = null;
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private ?FactoryResolver $factoryResolver = null;
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private ?DecoratorResolver $decoratorResolver = null;
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private ?ObjectCreator $objectResolver = null;
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private ?InstanceInjector $instanceResolver = null;
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private ?EnvironmentVariableResolver $envVariableResolver = null;
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public function __construct(
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private ContainerInterface $container,
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private ProxyFactory $proxyFactory,
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) {
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}
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/**
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* Resolve a definition to a value.
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*
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* @param Definition $definition Object that defines how the value should be obtained.
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* @param array $parameters Optional parameters to use to build the entry.
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*
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* @return mixed Value obtained from the definition.
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* @throws InvalidDefinition If the definition cannot be resolved.
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*/
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public function resolve(Definition $definition, array $parameters = []) : mixed
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{
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// Special case, tested early for speed
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if ($definition instanceof SelfResolvingDefinition) {
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return $definition->resolve($this->container);
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}
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$definitionResolver = $this->getDefinitionResolver($definition);
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return $definitionResolver->resolve($definition, $parameters);
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}
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public function isResolvable(Definition $definition, array $parameters = []) : bool
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{
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// Special case, tested early for speed
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if ($definition instanceof SelfResolvingDefinition) {
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return $definition->isResolvable($this->container);
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}
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$definitionResolver = $this->getDefinitionResolver($definition);
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return $definitionResolver->isResolvable($definition, $parameters);
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}
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/**
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* Returns a resolver capable of handling the given definition.
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*
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* @throws \RuntimeException No definition resolver was found for this type of definition.
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*/
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private function getDefinitionResolver(Definition $definition) : DefinitionResolver
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{
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switch (true) {
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case $definition instanceof ObjectDefinition:
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if (! $this->objectResolver) {
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$this->objectResolver = new ObjectCreator($this, $this->proxyFactory);
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}
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return $this->objectResolver;
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case $definition instanceof DecoratorDefinition:
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if (! $this->decoratorResolver) {
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$this->decoratorResolver = new DecoratorResolver($this->container, $this);
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}
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return $this->decoratorResolver;
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case $definition instanceof FactoryDefinition:
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if (! $this->factoryResolver) {
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$this->factoryResolver = new FactoryResolver($this->container, $this);
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}
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return $this->factoryResolver;
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case $definition instanceof ArrayDefinition:
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if (! $this->arrayResolver) {
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$this->arrayResolver = new ArrayResolver($this);
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}
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return $this->arrayResolver;
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case $definition instanceof EnvironmentVariableDefinition:
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if (! $this->envVariableResolver) {
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$this->envVariableResolver = new EnvironmentVariableResolver($this);
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}
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return $this->envVariableResolver;
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case $definition instanceof InstanceDefinition:
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if (! $this->instanceResolver) {
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$this->instanceResolver = new InstanceInjector($this, $this->proxyFactory);
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}
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return $this->instanceResolver;
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default:
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throw new \RuntimeException('No definition resolver was configured for definition of type ' . $definition::class);
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}
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}
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}
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