75 lines
2.2 KiB
PHP
75 lines
2.2 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* This file is part of phpDocumentor.
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*
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* @link http://phpdoc.org
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*/
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namespace phpDocumentor\Reflection;
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use InvalidArgumentException;
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use phpDocumentor\Reflection\Types\Context;
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use function explode;
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use function implode;
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use function strpos;
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class FqsenResolver
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{
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/** @var string Definition of the NAMESPACE operator in PHP */
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private const OPERATOR_NAMESPACE = '\\';
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public function resolve(string $fqsen, ?Context $context = null) : Fqsen
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{
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if ($context === null) {
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$context = new Context('');
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}
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if ($this->isFqsen($fqsen)) {
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return new Fqsen($fqsen);
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}
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return $this->resolvePartialStructuralElementName($fqsen, $context);
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}
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/**
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* Tests whether the given type is a Fully Qualified Structural Element Name.
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*/
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private function isFqsen(string $type) : bool
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{
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return strpos($type, self::OPERATOR_NAMESPACE) === 0;
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}
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/**
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* Resolves a partial Structural Element Name (i.e. `Reflection\DocBlock`) to its FQSEN representation
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* (i.e. `\phpDocumentor\Reflection\DocBlock`) based on the Namespace and aliases mentioned in the Context.
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*
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* @throws InvalidArgumentException When type is not a valid FQSEN.
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*/
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private function resolvePartialStructuralElementName(string $type, Context $context) : Fqsen
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{
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$typeParts = explode(self::OPERATOR_NAMESPACE, $type, 2);
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$namespaceAliases = $context->getNamespaceAliases();
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// if the first segment is not an alias; prepend namespace name and return
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if (!isset($namespaceAliases[$typeParts[0]])) {
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$namespace = $context->getNamespace();
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if ($namespace !== '') {
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$namespace .= self::OPERATOR_NAMESPACE;
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}
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return new Fqsen(self::OPERATOR_NAMESPACE . $namespace . $type);
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}
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$typeParts[0] = $namespaceAliases[$typeParts[0]];
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return new Fqsen(self::OPERATOR_NAMESPACE . implode(self::OPERATOR_NAMESPACE, $typeParts));
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}
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}
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