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<?php
declare(strict_types=1);
namespace Doctrine\Common\Collections\Expr;
use RuntimeException;
use function count;
/**
* Expression of Expressions combined by AND or OR operation.
*/
class CompositeExpression implements Expression
{
final public const TYPE_AND = 'AND';
final public const TYPE_OR = 'OR';
final public const TYPE_NOT = 'NOT';
/** @var list<Expression> */
private array $expressions = [];
/**
* @param Expression[] $expressions
*
* @throws RuntimeException
*/
public function __construct(private readonly string $type, array $expressions)
{
foreach ($expressions as $expr) {
if ($expr instanceof Value) {
throw new RuntimeException('Values are not supported expressions as children of and/or expressions.');
}
if (! ($expr instanceof Expression)) {
throw new RuntimeException('No expression given to CompositeExpression.');
}
$this->expressions[] = $expr;
}
if ($type === self::TYPE_NOT && count($this->expressions) !== 1) {
throw new RuntimeException('Not expression only allows one expression as child.');
}
}
/**
* Returns the list of expressions nested in this composite.
*
* @return list<Expression>
*/
public function getExpressionList()
{
return $this->expressions;
}
/** @return string */
public function getType()
{
return $this->type;
}
/**
* {@inheritDoc}
*/
public function visit(ExpressionVisitor $visitor)
{
return $visitor->walkCompositeExpression($this);
}
}
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