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<?php |
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namespace Ivory\Relation; |
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abstract class ProjectedRelationBase extends StreamlinedRelation |
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{ |
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/** @var Column[] */ |
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private $projectedColumns; |
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/** @var array map: column name => offset of the first column of the name, or {@link Tuple::AMBIGUOUS_COL} */ |
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private $projectedColNameMap; |
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public function __construct(IRelation $source, array $columns) |
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{ |
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parent::__construct($source); |
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$this->projectedColumns = $columns; |
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$this->projectedColNameMap = []; |
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foreach ($columns as $colOffset => $col) { |
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$colName = $col->getName(); |
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if (strlen($colName) > 0) { |
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$this->projectedColNameMap[$colName] = (isset($this->projectedColNameMap[$colName]) ? |
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Tuple::AMBIGUOUS_COL : |
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$colOffset |
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); |
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} |
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} |
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} |
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/** |
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* Converts a simple macro, as accepted, e.g., by {@link IRelation::project()}, to a PCRE. |
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* |
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* @param string $macroPattern the simple macro to convert |
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* @param int $starCnt number of star wildcards is stored here |
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* @return string PCRE equivalent to <tt>$macroPattern</tt> |
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*/ |
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protected static function simpleMacroPatternToPcre(string $macroPattern, int &$starCnt = null): string |
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{ |
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$starCnt = 0; |
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$pcre = '/^'; |
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$escaped = false; |
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$lastLiteral = ''; |
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for ($i = 0; $i < strlen($macroPattern); $i++) { |
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$c = $macroPattern[$i]; |
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if ($escaped) { |
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$lastLiteral .= $c; |
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$escaped = false; |
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} else { |
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switch ($c) { |
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case '\\': |
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$escaped = true; |
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break; |
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case '*': |
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$pcre .= preg_quote($lastLiteral, '/'); |
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$lastLiteral = ''; |
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$pcre .= '(.*)'; |
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$starCnt++; |
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break; |
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default: |
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$lastLiteral .= $c; |
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} |
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} |
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} |
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if ($escaped) { |
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$lastLiteral .= '\\'; |
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} |
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$pcre .= preg_quote($lastLiteral, '/'); |
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$pcre .= '$/'; |
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return $pcre; |
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} |
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protected static function simpleMacroReplacementToPcre(string $macroReplacement): string |
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{ |
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$repl = ''; |
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$stars = 0; |
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$escaped = false; |
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for ($i = 0; $i < strlen($macroReplacement); $i++) { |
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$c = $macroReplacement[$i]; |
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if ($escaped) { |
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if ($c == '$' || $c == '\\') { |
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$repl .= '\\'; |
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} |
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$repl .= $c; |
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$escaped = false; |
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} else { |
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switch ($c) { |
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case '\\': |
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$escaped = true; |
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break; |
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case '*': |
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$stars++; |
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$repl .= '${' . $stars . '}'; |
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break; |
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/** @noinspection PhpMissingBreakStatementInspection */ |
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case '$': |
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$repl .= '\\'; |
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// no break |
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default: |
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$repl .= $c; |
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} |
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} |
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} |
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if ($escaped) { |
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$repl .= '\\\\'; |
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} |
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return $repl; |
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} |
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public function getColumns() |
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{ |
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return $this->projectedColumns; |
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} |
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protected function getColNameMap() |
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{ |
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return $this->projectedColNameMap; |
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} |
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public function col($offsetOrNameOrEvaluator): IColumn |
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{ |
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return $this->_colImpl($offsetOrNameOrEvaluator, $this->projectedColumns, $this->projectedColNameMap, $this); |
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} |
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public function getIterator() |
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{ |
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$cnt = $this->count(); |
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for ($i = 0; $i < $cnt; $i++) { |
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yield $this->tuple($i); |
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} |
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} |
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} |
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ondrej-bouda /
ivory
This check looks for
@paramannotations where the type inferred by our type inference engine differs from the declared type.It makes a suggestion as to what type it considers more descriptive.
Most often this is a case of a parameter that can be null in addition to its declared types.