<?php
declare(strict_types=1);
namespace Doctrine\DBAL\Schema;
/**
* Represents the change of a column.
*/
class ColumnDiff
{
/** @internal The diff can be only instantiated by a {@see Comparator}. */
public function __construct(private readonly Column $oldColumn, private readonly Column $newColumn)
{
}
public function getOldColumn(): Column
{
return $this->oldColumn;
}
public function getNewColumn(): Column
{
return $this->newColumn;
}
public function hasTypeChanged(): bool
{
return $this->newColumn->getType()::class !== $this->oldColumn->getType()::class;
}
public function hasLengthChanged(): bool
{
return $this->hasPropertyChanged(static function (Column $column): ?int {
return $column->getLength();
});
}
public function hasPrecisionChanged(): bool
{
return $this->hasPropertyChanged(static function (Column $column): ?int {
return $column->getPrecision();
});
}
public function hasScaleChanged(): bool
{
return $this->hasPropertyChanged(static function (Column $column): int {
return $column->getScale();
});
}
public function hasUnsignedChanged(): bool
{
return $this->hasPropertyChanged(static function (Column $column): bool {
return $column->getUnsigned();
});
}
public function hasFixedChanged(): bool
{
return $this->hasPropertyChanged(static function (Column $column): bool {
return $column->getFixed();
});
}
public function hasNotNullChanged(): bool
{
return $this->hasPropertyChanged(static function (Column $column): bool {
return $column->getNotnull();
});
}
public function hasDefaultChanged(): bool
{
$oldDefault = $this->oldColumn->getDefault();
$newDefault = $this->newColumn->getDefault();
// Null values need to be checked additionally as they tell whether to create or drop a default value.
// null != 0, null != false, null != '' etc. This affects platform's table alteration SQL generation.
if (($newDefault === null) xor ($oldDefault === null)) {
return true;
}
return $newDefault != $oldDefault;
}
public function hasAutoIncrementChanged(): bool
{
return $this->hasPropertyChanged(static function (Column $column): bool {
return $column->getAutoincrement();
});
}
public function hasCommentChanged(): bool
{
return $this->hasPropertyChanged(static function (Column $column): string {
return $column->getComment();
});
}
private function hasPropertyChanged(callable $property): bool
{
return $property($this->newColumn) !== $property($this->oldColumn);
}
}