/**
* Creates index object from tokens.
* <p>
* If parameter $indexName is not passed then current position should point to the name of the index.
*
* @param Tokenizer $tokenizer Tokens collection.
* @param boolean $unique Uniqueness flag.
* @param string $indexName Optional name of the index.
*
* @return Index
* @throws NotSupportedException
*/
public static function create(Tokenizer $tokenizer, $unique = false, $indexName = '')
{
if (!$indexName) {
if ($tokenizer->getCurrentToken()->text !== '(') {
$indexName = $tokenizer->getCurrentToken()->text;
$tokenizer->nextToken();
$tokenizer->skipWhiteSpace();
}
}
if ($tokenizer->testUpperText('ON')) {
$tokenizer->skipWhiteSpace();
/** @noinspection PhpUnusedLocalVariableInspection */
$tableName = $tokenizer->getCurrentToken()->text;
$tokenizer->nextToken();
$tokenizer->skipWhiteSpace();
}
$index = new self($indexName, $unique);
if ($tokenizer->testText('(')) {
$tokenizer->skipWhiteSpace();
$token = $tokenizer->getCurrentToken();
$level = $token->level;
$column = '';
do {
if ($token->text === ',') {
$index->addColumn($column);
$column = '';
} else {
$column .= $token->text;
}
$token = $tokenizer->nextToken();
} while (!$tokenizer->endOfInput() && $token->level >= $level);
if ($column) {
$index->addColumn($column);
}
if (!$tokenizer->testText(')')) {
throw new NotSupportedException("')' expected. line:" . $tokenizer->getCurrentToken()->line);
}
} else {
throw new NotSupportedException("'(' expected. line:" . $tokenizer->getCurrentToken()->line);
}
return $index;
}
