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<?php |
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namespace Xiag\Rql\Parser\ValueParser; |
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use Xiag\Rql\Parser\Token; |
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use Xiag\Rql\Parser\TokenStream; |
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use Xiag\Rql\Parser\TypeCasterInterface; |
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use Xiag\Rql\Parser\SubParserInterface; |
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use Xiag\Rql\Parser\Exception\SyntaxErrorException; |
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class ScalarParser implements SubParserInterface |
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{ |
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/** |
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* @var TypeCasterInterface[] |
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*/ |
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protected $typeCasters = []; |
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/** |
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* @inheritdoc |
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*/ |
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public function parse(TokenStream $tokenStream) |
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{ |
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if (($typeToken = $tokenStream->nextIf(Token::T_TYPE)) !== null) { |
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$tokenStream->expect(Token::T_COLON); |
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$value = $this->getTypeCaster($typeToken->getValue())->typeCast($tokenStream->next()); |
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} else { |
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$value = $this->getScalarValue($tokenStream->next()); |
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} |
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return $value; |
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} |
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/** |
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* @param string $type |
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* @param TypeCasterInterface $typeCaster |
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* @return $this |
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*/ |
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public function registerTypeCaster($type, TypeCasterInterface $typeCaster) |
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{ |
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$this->typeCasters[$type] = $typeCaster; |
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return $this; |
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} |
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/** |
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* @param string $type |
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* @return TypeCasterInterface |
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*/ |
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public function getTypeCaster($type) |
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{ |
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if (!isset($this->typeCasters[$type])) { |
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throw new SyntaxErrorException(sprintf('Unknown type "%s"', $type)); |
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} |
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return $this->typeCasters[$type]; |
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} |
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/** |
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* @param Token $token |
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* @return mixed |
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* @throws SyntaxErrorException |
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*/ |
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protected function getScalarValue(Token $token) |
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{ |
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if ($token->test(Token::T_FALSE)) { |
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return false; |
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} elseif ($token->test(Token::T_TRUE)) { |
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return true; |
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} elseif ($token->test(Token::T_NULL)) { |
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return null; |
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} elseif ($token->test(Token::T_EMPTY)) { |
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return ''; |
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} elseif ($token->test(Token::T_DATE)) { |
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return new \DateTime($token->getValue()); |
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} elseif ($token->test(Token::T_STRING)) { |
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return $token->getValue(); |
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} elseif ($token->test(Token::T_INTEGER)) { |
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return (int)$token->getValue(); |
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} elseif ($token->test(Token::T_FLOAT)) { |
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return (float)$token->getValue(); |
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} |
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throw new SyntaxErrorException( |
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sprintf( |
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'Invalid scalar token "%s" (%s)', |
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$token->getValue(), |
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$token->getName() |
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) |
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); |
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} |
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} |
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xiag-ag /
rql-parser
