66 lines
1.7 KiB
PHP
66 lines
1.7 KiB
PHP
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<?php
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/**
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* An abstract base class that all query parser productions extend.
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*/
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abstract class Doctrine_Query_Production
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{
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/**
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* a parser object
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*
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* @var Doctrine_Query_Parser
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*/
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protected $_parser;
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/**
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* Creates a new production object.
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*
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* @param Doctrine_Query_Parser $parser a parser object
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*/
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public function __construct(Doctrine_Query_Parser $parser)
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{
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$this->_parser = $parser;
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}
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protected function _isNextToken($token)
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{
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$la = $this->_parser->lookahead;
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return ($la['type'] === $token || $la['value'] === $token);
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}
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/**
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* Executes a production with specified name and parameters.
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*
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* @param string $name production name
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* @param array $params an associative array containing parameter names and
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* their values
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* @return mixed
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*/
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public function __call($method, $args)
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{
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return $this->_parser->getProduction($method)->execute($args);
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$this->_parser->getPrinter()->startProduction($name);
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$retval = $this->_parser->getProduction($method)->execute($args);
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$this->_parser->getPrinter()->endProduction();
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return $retval;
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}
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/**
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* Executes this production using the specified parameters.
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*
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* @param array $params an associative array containing parameter names and
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* their values
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* @return mixed
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*/
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abstract public function execute(array $params = array());
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protected function _isSubquery()
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{
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$lookahead = $this->_parser->lookahead;
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$next = $this->_parser->getScanner()->peek();
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return $lookahead['value'] === '(' && $next['type'] === Doctrine_Query_Token::T_SELECT;
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}
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}
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