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<?php
declare(strict_types=1);
namespace Doctrine\ORM\Persisters;
use Doctrine\Common\Collections\Expr\Comparison;
use Doctrine\Common\Collections\Expr\CompositeExpression;
use Doctrine\Common\Collections\Expr\ExpressionVisitor;
use Doctrine\Common\Collections\Expr\Value;
use Doctrine\ORM\Mapping\ClassMetadata;
use Doctrine\ORM\Persisters\Entity\BasicEntityPersister;
use RuntimeException;
use function implode;
use function in_array;
use function is_object;
/**
* Visit Expressions and generate SQL WHERE conditions from them.
*/
class SqlExpressionVisitor extends ExpressionVisitor
{
public function __construct(
private readonly BasicEntityPersister $persister,
private readonly ClassMetadata $classMetadata,
) {
}
/** Converts a comparison expression into the target query language output. */
public function walkComparison(Comparison $comparison): string
{
$field = $comparison->getField();
$value = $comparison->getValue()->getValue(); // shortcut for walkValue()
if (
isset($this->classMetadata->associationMappings[$field]) &&
$value !== null &&
! is_object($value) &&
! in_array($comparison->getOperator(), [Comparison::IN, Comparison::NIN], true)
) {
throw MatchingAssociationFieldRequiresObject::fromClassAndAssociation(
$this->classMetadata->name,
$field,
);
}
return $this->persister->getSelectConditionStatementSQL($field, $value, null, $comparison->getOperator());
}
/**
* Converts a composite expression into the target query language output.
*
* @throws RuntimeException
*/
public function walkCompositeExpression(CompositeExpression $expr): string
{
$expressionList = [];
foreach ($expr->getExpressionList() as $child) {
$expressionList[] = $this->dispatch($child);
}
return match ($expr->getType()) {
CompositeExpression::TYPE_AND => '(' . implode(' AND ', $expressionList) . ')',
CompositeExpression::TYPE_OR => '(' . implode(' OR ', $expressionList) . ')',
CompositeExpression::TYPE_NOT => 'NOT (' . $expressionList[0] . ')',
default => throw new RuntimeException('Unknown composite ' . $expr->getType()),
};
}
/**
* Converts a value expression into the target query language part.
*/
public function walkValue(Value $value): string
{
return '?';
}
}
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