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<?php |
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namespace Doctrine\DBAL\Schema\Visitor; |
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use Doctrine\DBAL\Platforms\AbstractPlatform; |
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use Doctrine\DBAL\Schema\ForeignKeyConstraint; |
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use Doctrine\DBAL\Schema\SchemaException; |
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use Doctrine\DBAL\Schema\Sequence; |
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use Doctrine\DBAL\Schema\Table; |
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use SplObjectStorage; |
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use function assert; |
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use function strlen; |
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/** |
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* Gathers SQL statements that allow to completely drop the current schema. |
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*/ |
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class DropSchemaSqlCollector extends AbstractVisitor |
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{ |
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/** @var SplObjectStorage */ |
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private $constraints; |
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/** @var SplObjectStorage */ |
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private $sequences; |
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/** @var SplObjectStorage */ |
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private $tables; |
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/** @var AbstractPlatform */ |
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private $platform; |
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public function __construct(AbstractPlatform $platform) |
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{ |
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$this->platform = $platform; |
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$this->clearQueries(); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function acceptTable(Table $table) |
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{ |
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$this->tables->attach($table); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function acceptForeignKey(Table $localTable, ForeignKeyConstraint $fkConstraint) |
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{ |
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if (! $this->platform->supportsCreateDropForeignKeyConstraints()) { |
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return; |
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} |
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if (strlen($fkConstraint->getName()) === 0) { |
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throw SchemaException::namedForeignKeyRequired($localTable, $fkConstraint); |
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} |
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$this->constraints->attach($fkConstraint, $localTable); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function acceptSequence(Sequence $sequence) |
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{ |
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$this->sequences->attach($sequence); |
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} |
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/** |
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* @return void |
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*/ |
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public function clearQueries() |
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{ |
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$this->constraints = new SplObjectStorage(); |
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$this->sequences = new SplObjectStorage(); |
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$this->tables = new SplObjectStorage(); |
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} |
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/** |
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* @return string[] |
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*/ |
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public function getQueries() |
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{ |
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$sql = []; |
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foreach ($this->constraints as $fkConstraint) { |
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assert($fkConstraint instanceof ForeignKeyConstraint); |
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$localTable = $this->constraints[$fkConstraint]; |
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$sql[] = $this->platform->getDropForeignKeySQL($fkConstraint, $localTable); |
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} |
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foreach ($this->sequences as $sequence) { |
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assert($sequence instanceof Sequence); |
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$sql[] = $this->platform->getDropSequenceSQL($sequence); |
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} |
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foreach ($this->tables as $table) { |
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assert($table instanceof Table); |
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$sql[] = $this->platform->getDropTableSQL($table); |
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} |
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return $sql; |
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} |
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} |
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doctrine /
dbal
