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<?php
namespace Bitrix\Location\Geometry\Type;
use Bitrix\Main\SystemException;
/**
* Collection: Abstract class for compound geometries
*
* A geometry is a collection if it is made up of other
* component geometries. Therefore, everything but a Point
* is a Collection. For example a LineString is a collection
* of Points. A Polygon is a collection of LineStrings etc.
*/
abstract class Collection extends BaseGeometry
{
/** @var BaseGeometry[] */
protected $components = [];
/**
* Constructor: Checks and sets component geometries
*
* @param array $components array of geometries
*/
public function __construct(array $components = [])
{
foreach ($components as $component)
{
if ($component instanceof BaseGeometry)
{
$this->components[] = $component;
}
else
{
throw new SystemException('Cannot create a collection with non-geometries');
}
}
}
/**
* @return BaseGeometry[]
*/
public function getComponents(): array
{
return $this->components;
}
/**
* @return int
*/
public function getComponentsCount(): int
{
return count($this->components);
}
/**
* @inheritDoc
*/
public function asArray(): array
{
$result = [];
foreach ($this->components as $component)
{
$result[] = $component->asArray();
}
return $result;
}
}