andsalves / doctrine-elastic

    /**

     * @return \Doctrine\ORM\Query\AST\Functions\FunctionNode

     */

    public function CustomFunctionsReturningNumerics() {

        // getCustomNumericFunction is case-insensitive

        $functionName = strtolower($this->lexer->lookahead['value']);

        $functionClass = $this->em->getConfiguration()->getCustomNumericFunction($functionName);

        $function = is_string($functionClass)

            ? new $functionClass($functionName)

            : call_user_func($functionClass, $functionName);

        $function->parse($this);

        return $function;

    }

    /**

     * FunctionsReturningDateTime ::=

    /**

     * @return \Doctrine\ORM\Query\AST\Functions\FunctionNode

     */

    public function CustomFunctionsReturningDatetime() {

        // getCustomDatetimeFunction is case-insensitive

        $functionName = $this->lexer->lookahead['value'];

        $functionClass = $this->em->getConfiguration()->getCustomDatetimeFunction($functionName);

        $function = is_string($functionClass)

            ? new $functionClass($functionName)

            : call_user_func($functionClass, $functionName);

        $function->parse($this);

        return $function;

    }

    /**

     * FunctionsReturningStrings ::=

    /**

     * @return \Doctrine\ORM\Query\AST\Functions\FunctionNode

     */

    public function CustomFunctionsReturningStrings() {

        // getCustomStringFunction is case-insensitive

        $functionName = $this->lexer->lookahead['value'];

        $functionClass = $this->em->getConfiguration()->getCustomStringFunction($functionName);

        $function = is_string($functionClass)

            ? new $functionClass($functionName)

            : call_user_func($functionClass, $functionName);

        $function->parse($this);

        return $function;

    }

}