/**
* Parses a parameter of a routine.
*
* @param string $param Parameter's definition.
*
* @return array
*/
public function getReturnType($param)
{
$lexer = new Lexer($param);
// A dummy parser is used for error reporting.
$type = DataTypeFragment::parse(new Parser(), $lexer->list);
if ($type === null) {
return array('', '', '', '', '');
}
$options = array();
foreach ($type->options->options as $opt) {
$options[] = is_string($opt) ? $opt : $opt['value'];
}
return array('', '', $type->name, implode(',', $type->parameters), implode(' ', $options));
}
/**
* @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 ParamDefFragment[]
*/
public static function parse(Parser $parser, TokensList $list, array $options = array())
{
$ret = array();
$expr = new ParamDefFragment();
/**
* The state of the parser.
*
* Below are the states of the parser.
*
* 0 -----------------------[ ( ]------------------------> 1
*
* 1 ----------------[ IN / OUT / INOUT ]----------------> 1
* 1 ----------------------[ name ]----------------------> 2
*
* 2 -------------------[ data type ]--------------------> 3
*
* 3 ------------------------[ , ]-----------------------> 1
* 3 ------------------------[ ) ]-----------------------> -1
*
* @var int
*/
$state = 0;
for (; $list->idx < $list->count; ++$list->idx) {
/**
* Token parsed at this moment.
* @var 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 === '(') {
$state = 1;
}
continue;
} elseif ($state === 1) {
if ($token->value === 'IN' || $token->value === 'OUT' || $token->value === 'INOUT') {
$expr->inOut = $token->value;
++$list->idx;
} elseif ($token->value === ')') {
++$list->idx;
break;
} else {
$expr->name = $token->value;
$state = 2;
}
} elseif ($state === 2) {
$expr->type = DataTypeFragment::parse($parser, $list);
$state = 3;
} elseif ($state === 3) {
$ret[] = $expr;
$expr = new ParamDefFragment();
if ($token->value === ',') {
$state = 1;
continue;
} elseif ($token->value === ')') {
++$list->idx;
break;
}
}
}
// Last iteration was not saved.
if (!empty($expr->name)) {
$ret[] = $expr;
}
--$list->idx;
return $ret;
}
/**
* Parsing the `CREATE` statement.
*
* @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 before(Parser $parser, TokensList $list, Token $token)
{
++$list->idx;
$this->name = CreateDefFragment::parse($parser, $list);
if ($this->options->has('TABLE')) {
++$list->idx;
$this->fields = FieldDefFragment::parse($parser, $list);
++$list->idx;
$this->entityOptions = OptionsFragment::parse($parser, $list, CreateDefFragment::$TABLE_OPTIONS);
} elseif ($this->options->has('PROCEDURE') || $this->options->has('FUNCTION')) {
++$list->idx;
$this->parameters = ParamDefFragment::parse($parser, $list);
if ($this->options->has('FUNCTION')) {
$token = $list->getNextOfType(Token::TYPE_KEYWORD);
if ($token->value !== 'RETURNS') {
$parser->error('\'RETURNS\' keyword was expected.', $token);
} else {
++$list->idx;
$this->return = DataTypeFragment::parse($parser, $list);
}
}
++$list->idx;
$this->entityOptions = OptionsFragment::parse($parser, $list, CreateDefFragment::$FUNC_OPTIONS);
++$list->idx;
$this->body = array();
for (; $list->idx < $list->count; ++$list->idx) {
$token = $list->tokens[$list->idx];
$this->body[] = $token;
if ($token->type === Token::TYPE_KEYWORD && $token->value === 'END') {
break;
}
}
}
}
/**
* @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 FieldDefFragment[]
*/
public static function parse(Parser $parser, TokensList $list, array $options = array())
{
$ret = array();
$expr = new FieldDefFragment();
/**
* The state of the parser.
*
* Below are the states of the parser.
*
* 0 -----------------------[ ( ]------------------------> 1
*
* 1 --------------------[ CONSTRAINT ]------------------> 1
* 1 -----------------------[ key ]----------------------> 2
* 1 -------------[ constraint / column name ]-----------> 2
*
* 2 --------------------[ data type ]-------------------> 3
*
* 3 ---------------------[ options ]--------------------> 4
*
* 4 --------------------[ REFERENCES ]------------------> 4
*
* 5 ------------------------[ , ]-----------------------> 1
* 5 ------------------------[ ) ]-----------------------> -1
*
* @var int
*/
$state = 0;
for (; $list->idx < $list->count; ++$list->idx) {
/**
* Token parsed at this moment.
* @var 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 === '(') {
$state = 1;
}
} elseif ($state === 1) {
if ($token->type === Token::TYPE_KEYWORD && $token->value === 'CONSTRAINT') {
$expr->isConstraint = true;
} elseif ($token->type === Token::TYPE_KEYWORD && $token->flags & Token::FLAG_KEYWORD_KEY) {
$expr->key = KeyFragment::parse($parser, $list);
$state = 4;
} else {
$expr->name = $token->value;
if (!$expr->isConstraint) {
$state = 2;
}
}
} elseif ($state === 2) {
$expr->type = DataTypeFragment::parse($parser, $list);
$state = 3;
} elseif ($state === 3) {
$expr->options = OptionsFragment::parse($parser, $list, static::$FIELD_OPTIONS);
$state = 4;
} elseif ($state === 4) {
if ($token->type === Token::TYPE_KEYWORD && $token->value === 'REFERENCES') {
++$list->idx;
// Skipping keyword 'REFERENCES'.
$expr->references = ReferencesKeyword::parse($parser, $list);
} else {
--$list->idx;
}
$state = 5;
} else {
if ($state === 5) {
if (!empty($expr->type) || !empty($expr->key)) {
$ret[] = $expr;
}
$expr = new FieldDefFragment();
if ($token->value === ',') {
$state = 1;
continue;
} elseif ($token->value === ')') {
++$list->idx;
break;
}
}
}
}
// Last iteration was not saved.
if (!empty($expr->type) || !empty($expr->key)) {
$ret[] = $expr;
}
--$list->idx;
return $ret;
}
