Gets the next token.
|
public getNextOfType ( integer $type ) : |
||
| $type | integer | The type. |
| Результат | ||
public function testGetNextOfType()
{
$list = new TokensList($this->tokens);
$this->assertEquals($this->tokens[0], $list->getNextOfType(Token::TYPE_KEYWORD));
$this->assertEquals($this->tokens[4], $list->getNextOfType(Token::TYPE_KEYWORD));
$this->assertEquals(null, $list->getNextOfType(Token::TYPE_KEYWORD));
}
/**
* Jump to the end of the delimiter.
*
* @param Parser $parser The instance that requests parsing.
* @param TokensList $list The list of tokens to be parsed.
* @param Token $token The token that is being parsed.
*
* @return void
*/
public function after(Parser $parser, TokensList $list, Token $token)
{
$list->getNextOfType(Token::TYPE_DELIMITER);
--$list->idx;
}
/**
* Parses the statements defined by the tokens list.
*
* @param Parser $parser The instance that requests parsing.
* @param TokensList $list The list of tokens to be parsed.
*
* @return void
*/
public function parse(Parser $parser, TokensList $list)
{
/**
* Array containing all list of clauses parsed.
* This is used to check for duplicates.
*
* @var array $parsedClauses
*/
$parsedClauses = array();
// This may be corrected by the parser.
$this->first = $list->idx;
/**
* Whether options were parsed or not.
* For statements that do not have any options this is set to `true` by
* default.
*
* @var bool $parsedOptions
*/
$parsedOptions = empty(static::$OPTIONS);
for (; $list->idx < $list->count; ++$list->idx) {
/**
* Token parsed at this moment.
*
* @var Token $token
*/
$token = $list->tokens[$list->idx];
// End of statement.
if ($token->type === Token::TYPE_DELIMITER) {
break;
}
// Checking if this closing bracket is the pair for a bracket
// outside the statement.
if ($token->value === ')' && $parser->brackets > 0) {
--$parser->brackets;
continue;
}
// Only keywords are relevant here. Other parts of the query are
// processed in the functions below.
if ($token->type !== Token::TYPE_KEYWORD) {
if ($token->type !== TOKEN::TYPE_COMMENT && $token->type !== Token::TYPE_WHITESPACE) {
$parser->error(__('Unexpected token.'), $token);
}
continue;
}
// Unions are parsed by the parser because they represent more than
// one statement.
if ($token->value === 'UNION' || $token->value === 'UNION ALL' || $token->value === 'UNION DISTINCT') {
break;
}
$lastIdx = $list->idx;
// ON DUPLICATE KEY UPDATE ...
// has to be parsed in parent statement (INSERT or REPLACE)
// so look for it and break
if (get_class($this) === 'SqlParser\\Statements\\SelectStatement' && $token->value === 'ON') {
++$list->idx;
// Skip ON
// look for ON DUPLICATE KEY UPDATE
$first = $list->getNextOfType(Token::TYPE_KEYWORD);
$second = $list->getNextOfType(Token::TYPE_KEYWORD);
$third = $list->getNextOfType(Token::TYPE_KEYWORD);
if ($first && $second && $third && $first->value === 'DUPLICATE' && $second->value === 'KEY' && $third->value === 'UPDATE') {
$list->idx = $lastIdx;
break;
}
}
$list->idx = $lastIdx;
/**
* The name of the class that is used for parsing.
*
* @var Component $class
*/
$class = null;
/**
* The name of the field where the result of the parsing is stored.
*
* @var string $field
*/
$field = null;
/**
* Parser's options.
*
* @var array $options
*/
$options = array();
// Looking for duplicated clauses.
if (!empty(Parser::$KEYWORD_PARSERS[$token->value]) || !empty(Parser::$STATEMENT_PARSERS[$token->value])) {
if (!empty($parsedClauses[$token->value])) {
$parser->error(__('This type of clause was previously parsed.'), $token);
break;
}
$parsedClauses[$token->value] = true;
}
// Checking if this is the beginning of a clause.
if (!empty(Parser::$KEYWORD_PARSERS[$token->value])) {
$class = Parser::$KEYWORD_PARSERS[$token->value]['class'];
$field = Parser::$KEYWORD_PARSERS[$token->value]['field'];
if (!empty(Parser::$KEYWORD_PARSERS[$token->value]['options'])) {
$options = Parser::$KEYWORD_PARSERS[$token->value]['options'];
}
}
// Checking if this is the beginning of the statement.
if (!empty(Parser::$STATEMENT_PARSERS[$token->value])) {
if (!empty(static::$CLAUSES) && empty(static::$CLAUSES[$token->value])) {
// Some keywords (e.g. `SET`) may be the beginning of a
// statement and a clause.
// If such keyword was found and it cannot be a clause of
// this statement it means it is a new statement, but no
// delimiter was found between them.
$parser->error(__('A new statement was found, but no delimiter between it and the previous one.'), $token);
break;
}
if (!$parsedOptions) {
if (empty(static::$OPTIONS[$token->value])) {
// Skipping keyword because if it is not a option.
++$list->idx;
}
$this->options = OptionsArray::parse($parser, $list, static::$OPTIONS);
$parsedOptions = true;
}
} elseif ($class === null) {
// There is no parser for this keyword and isn't the beginning
// of a statement (so no options) either.
$parser->error(__('Unrecognized keyword.'), $token);
continue;
}
$this->before($parser, $list, $token);
// Parsing this keyword.
if ($class !== null) {
++$list->idx;
// Skipping keyword or last option.
$this->{$field} = $class::parse($parser, $list, $options);
}
$this->after($parser, $list, $token);
}
// This may be corrected by the parser.
$this->last = --$list->idx;
// Go back to last used token.
}
