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<?php
/**
* Parses an array.
*
* @package SqlParser
* @subpackage Components
*/
namespace SqlParser\Components;
use SqlParser\Component;
use SqlParser\Parser;
use SqlParser\Token;
use SqlParser\TokensList;
/**
* Parses an array.
*
* @category Components
* @package SqlParser
* @subpackage Components
* @author Dan Ungureanu <udan1107@gmail.com>
* @license http://opensource.org/licenses/GPL-2.0 GNU Public License
*/
class ArrayObj extends Component
{
/**
* The array that contains the unprocessed value of each token.
*
* @var array
*/
public $raw = array();
/**
* The array that contains the processed value of each token.
*
* @var array
*/
public $values = array();
/**
* Constructor.
*
* @param array $raw The unprocessed values.
* @param array $values The processed values.
*/
public function __construct(array $raw = array(), array $values = array())
{
$this->raw = $raw;
$this->values = $values;
}
/**
* @param Parser $parser The parser that serves as context.
* @param TokensList $list The list of tokens that are being parsed.
* @param array $options Parameters for parsing.
*
* @return mixed
*/
public static function parse(Parser $parser, TokensList $list, array $options = array())
{
$ret = empty($options['type']) ? new ArrayObj() : array();
/**
* The state of the parser.
*
* Below are the states of the parser.
*
* 0 -----------------------[ ( ]------------------------> 1
*
* 1 ------------------[ array element ]-----------------> 2
*
* 2 ------------------------[ , ]-----------------------> 1
* 2 ------------------------[ ) ]-----------------------> (END)
*
* @var int $state
*/
$state = 0;
for (; $list->idx < $list->count; ++$list->idx) {
/**
* Token parsed at this moment.
*
* @var Token $token
*/
$token = $list->tokens[$list->idx];
// End of statement.
if ($token->type === Token::TYPE_DELIMITER) {
break;
}
// Skipping whitespaces and comments.
if (($token->type === Token::TYPE_WHITESPACE) || ($token->type === Token::TYPE_COMMENT)) {
continue;
}
if ($state === 0) {
if (($token->type !== Token::TYPE_OPERATOR) || ($token->value !== '(')) {
$parser->error(
__('An opening bracket was expected.'),
$token
);
break;
}
$state = 1;
} elseif ($state === 1) {
if (($token->type === Token::TYPE_OPERATOR) && ($token->value === ')')) {
// Empty array.
break;
}
if (empty($options['type'])) {
$ret->values[] = $token->value;
$ret->raw[] = $token->token;
} else {
$ret[] = $options['type']::parse(
$parser,
$list,
empty($options['typeOptions']) ? array() : $options['typeOptions']
);
}
$state = 2;
} elseif ($state === 2) {
if (($token->type !== Token::TYPE_OPERATOR) || (($token->value !== ',') && ($token->value !== ')'))) {
$parser->error(
__('A comma or a closing bracket was expected'),
$token
);
break;
}
if ($token->value === ',') {
$state = 1;
} else { // )
break;
}
}
}
return $ret;
}
/**
* @param ArrayObj|ArrayObj[] $component The component to be built.
*
* @return string
*/
public static function build($component)
{
if (is_array($component)) {
return implode(', ', $component);
} elseif (!empty($component->raw)) {
return '(' . implode(', ', $component->raw) . ')';
} else {
return '(' . implode(', ', $component->values) . ')';
}
}
}
|
