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<?php |
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declare(strict_types=1); |
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namespace Remorhaz\JSON\Pointer\Parser; |
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use Remorhaz\JSON\Pointer\TokenMatcher; |
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use Remorhaz\UniLex\Exception as UnilexException; |
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use Remorhaz\UniLex\Grammar\ContextFree\GrammarInterface; |
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use Remorhaz\UniLex\Grammar\ContextFree\GrammarLoader; |
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use Remorhaz\UniLex\Grammar\ContextFree\TokenFactory; |
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use Remorhaz\UniLex\Lexer\TokenReader; |
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use Remorhaz\UniLex\Lexer\TokenReaderInterface; |
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use Remorhaz\UniLex\Parser\LL1\Parser as Ll1Parser; |
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use Remorhaz\UniLex\Parser\LL1\TranslationSchemeApplier; |
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use Remorhaz\UniLex\Unicode\CharBufferFactory; |
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use Throwable; |
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final class Ll1ParserFactory implements Ll1ParserFactoryInterface |
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{ |
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private $grammar; |
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public function createParser(string $source, LocatorBuilderInterface $locatorBuilder): Ll1Parser |
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{ |
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try { |
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$scheme = new TranslationScheme($locatorBuilder); |
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$parser = new Ll1Parser( |
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$this->getGrammar(), |
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$this->createSourceReader($source), |
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new TranslationSchemeApplier($scheme) |
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); |
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$parser->loadLookupTable(__DIR__ . '/../../generated/LookupTable.php'); |
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} catch (Throwable $e) { |
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throw new Exception\LL1ParserNotCreatedException($e); |
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} |
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return $parser; |
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} |
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/** |
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* @return GrammarInterface |
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* @throws UnilexException |
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*/ |
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private function getGrammar(): GrammarInterface |
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{ |
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if (!isset($this->grammar)) { |
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$this->grammar = GrammarLoader::loadFile(__DIR__ . '/../../spec/GrammarSpec.php'); |
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} |
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return $this->grammar; |
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} |
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/** |
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* @param string $source |
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* @return TokenReaderInterface |
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* @throws UnilexException |
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*/ |
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private function createSourceReader(string $source): TokenReaderInterface |
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{ |
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return new TokenReader( |
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CharBufferFactory::createFromString($source), |
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new TokenMatcher, |
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new TokenFactory($this->getGrammar()) |
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); |
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} |
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} |
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remorhaz /
php-json-pointer
