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<?php declare(strict_types=1); |
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|
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namespace Invoker\ParameterResolver; |
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|
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use ReflectionException; |
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use ReflectionFunctionAbstract; |
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|
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/** |
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* Finds the default value for a parameter, *if it exists*. |
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*/ |
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class DefaultValueResolver implements ParameterResolver |
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{ |
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public function getParameters( |
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ReflectionFunctionAbstract $reflection, |
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array $providedParameters, |
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array $resolvedParameters |
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): array { |
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$parameters = $reflection->getParameters(); |
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|
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// Skip parameters already resolved |
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if (! empty($resolvedParameters)) { |
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$parameters = array_diff_key($parameters, $resolvedParameters); |
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} |
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|
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foreach ($parameters as $index => $parameter) { |
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\assert($parameter instanceof \ReflectionParameter); |
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if ($parameter->isDefaultValueAvailable()) { |
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try { |
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$resolvedParameters[$index] = $parameter->getDefaultValue(); |
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} catch (ReflectionException $e) { |
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// Can't get default values from PHP internal classes and functions |
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} |
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} else { |
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$parameterType = $parameter->getType(); |
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if ($parameterType && $parameterType->allowsNull()) { |
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$resolvedParameters[$index] = null; |
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} |
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} |
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} |
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|
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return $resolvedParameters; |
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} |
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} |
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|
