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ParameterDefinition.php
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ParameterDefinition.php
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<?php
declare(strict_types=1);
namespace Yiisoft\Definitions;
use Psr\Container\ContainerInterface;
use ReflectionNamedType;
use ReflectionParameter;
use ReflectionUnionType;
use Throwable;
use Yiisoft\Definitions\Contract\DefinitionInterface;
use Yiisoft\Definitions\Exception\CircularReferenceException;
use Yiisoft\Definitions\Exception\NotInstantiableException;
use Yiisoft\Definitions\Exception\InvalidConfigException;
use function get_class;
use function gettype;
use function is_object;
/**
* Parameter definition resolves an object based on information from `ReflectionParameter` instance.
*/
final class ParameterDefinition implements DefinitionInterface
{
private ReflectionParameter $parameter;
public function __construct(ReflectionParameter $parameter)
{
$this->parameter = $parameter;
}
public function getReflection(): ReflectionParameter
{
return $this->parameter;
}
public function isVariadic(): bool
{
return $this->parameter->isVariadic();
}
public function isOptional(): bool
{
return $this->parameter->isOptional();
}
public function isBuiltin(): bool
{
$type = $this->parameter->getType();
if ($type === null) {
return false;
}
return $type->isBuiltin();
}
public function hasValue(): bool
{
return $this->parameter->isDefaultValueAvailable();
}
public function resolve(ContainerInterface $container)
{
$type = $this->parameter->getType();
if ($type === null || $this->isVariadic()) {
return $this->resolveVariadicOrBuiltinOrNonTyped();
}
if ($this->isUnionType()) {
return $this->resolveUnionType($container);
}
if (!$this->isBuiltin()) {
/** @var ReflectionNamedType $type */
$typeName = $type->getName();
if ($typeName === 'self') {
// If type name is "self", it means that called class and
// $parameter->getDeclaringClass() returned instance of `ReflectionClass`.
/** @psalm-suppress PossiblyNullReference */
$typeName = $this->parameter
->getDeclaringClass()
->getName();
}
try {
/** @var mixed */
$result = $container->get($typeName);
} catch (Throwable $t) {
if (
$this->parameter->isOptional()
&& (
$t instanceof CircularReferenceException
|| !$container->has($typeName)
)
) {
return $this->parameter->getDefaultValue();
}
throw $t;
}
if (!$result instanceof $typeName) {
$actualType = $this->getValueType($result);
throw new InvalidConfigException(
"Container returned incorrect type \"$actualType\" for service \"{$type->getName()}\"."
);
}
return $result;
}
return $this->resolveVariadicOrBuiltinOrNonTyped();
}
/**
* @return mixed
*/
private function resolveVariadicOrBuiltinOrNonTyped()
{
if ($this->parameter->isDefaultValueAvailable()) {
return $this->parameter->getDefaultValue();
}
if ($this->isOptional()) {
throw new NotInstantiableException(
sprintf(
'Can not determine default value of parameter "%s" when instantiating "%s" ' .
'because it is PHP internal. Please specify argument explicitly.',
$this->parameter->getName(),
$this->getCallable(),
)
);
}
$type = $this->getType();
if ($type === null) {
throw new NotInstantiableException(
sprintf(
'Can not determine value of the "%s" parameter without type when instantiating "%s". ' .
'Please specify argument explicitly.',
$this->parameter->getName(),
$this->getCallable(),
)
);
}
throw new NotInstantiableException(
sprintf(
'Can not determine value of the "%s" parameter of type "%s" when instantiating "%s". ' .
'Please specify argument explicitly.',
$this->parameter->getName(),
$type,
$this->getCallable(),
)
);
}
/**
* Resolve union type string provided as a class name.
*
* @throws InvalidConfigException If an object of incorrect type was created.
* @throws Throwable
*
* @return mixed|null Ready to use object or null if definition can
* not be resolved and is marked as optional.
*/
private function resolveUnionType(ContainerInterface $container)
{
/**
* @psalm-suppress UndefinedClass
*
* @var ReflectionUnionType $parameterType
*/
$parameterType = $this->parameter->getType();
/**
* @var \ReflectionType[] $types
* @psalm-suppress UndefinedClass
*/
$types = $parameterType->getTypes();
$class = implode('|', $types);
foreach ($types as $type) {
if (!$type->isBuiltin()) {
/** @var ReflectionNamedType $type */
$typeName = $type->getName();
if ($typeName === 'self') {
// If type name is "self", it means that called class and
// $parameter->getDeclaringClass() returned instance of `ReflectionClass`.
/** @psalm-suppress PossiblyNullReference */
$typeName = $this->parameter
->getDeclaringClass()
->getName();
}
try {
/** @var mixed */
$result = $container->get($typeName);
$resolved = true;
} catch (Throwable $t) {
$error = $t;
$resolved = false;
}
if ($resolved) {
/** @var mixed $result Exist, because $resolved is true */
if (!$result instanceof $typeName) {
$actualType = $this->getValueType($result);
throw new InvalidConfigException(
"Container returned incorrect type \"$actualType\" for service \"$class\"."
);
}
return $result;
}
/** @var Throwable $error Exist, because $resolved is false */
if (
!$error instanceof CircularReferenceException
&& $container->has($typeName)
) {
throw $error;
}
}
}
if ($this->parameter->isOptional()) {
return null;
}
if (!isset($error)) {
return $this->resolveVariadicOrBuiltinOrNonTyped();
}
throw $error;
}
private function isUnionType(): bool
{
/** @psalm-suppress UndefinedClass */
return $this->parameter->getType() instanceof ReflectionUnionType;
}
private function getType(): ?string
{
$type = $this->parameter->getType();
/** @psalm-suppress UndefinedClass, TypeDoesNotContainType */
if ($type instanceof ReflectionUnionType) {
/** @var ReflectionNamedType[] */
$namedTypes = $type->getTypes();
$names = array_map(
static fn (ReflectionNamedType $t) => $t->getName(),
$namedTypes
);
return implode('|', $names);
}
if ($type instanceof ReflectionNamedType) {
return $type->getName();
}
return null;
}
private function getCallable(): string
{
$callable = [];
$class = $this->parameter->getDeclaringClass();
if ($class !== null) {
$callable[] = $class->getName();
}
$callable[] = $this->parameter
->getDeclaringFunction()
->getName() .
'()';
return implode('::', $callable);
}
/**
* Get type of the value provided.
*
* @param mixed $value Value to get type for.
*/
private function getValueType($value): string
{
return is_object($value) ? get_class($value) : gettype($value);
}
}