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<?php |
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/* |
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* This file is part of the Geotools library. |
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* |
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* (c) Antoine Corcy <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace League\Geotools; |
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use League\Geotools\BoundingBox\BoundingBox; |
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use League\Geotools\BoundingBox\BoundingBoxInterface; |
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use League\Geotools\Coordinate\Coordinate; |
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use League\Geotools\Coordinate\CoordinateCollection; |
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use League\Geotools\Coordinate\Ellipsoid; |
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use League\Geotools\Exception\InvalidArgumentException; |
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/** |
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* @author Rémi San <[email protected]> |
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*/ |
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abstract class GeometryCollection extends ArrayCollection implements GeometryInterface |
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{ |
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/** |
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* @var Ellipsoid |
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*/ |
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private $ellipsoid; |
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/** |
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* @var integer |
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*/ |
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private $precision; |
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/** |
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* CoordinateCollection constructor. |
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* |
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* @param GeometryInterface[] $geometries |
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* @param Ellipsoid $ellipsoid |
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*/ |
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public function __construct(array $geometries = array(), Ellipsoid $ellipsoid = null) |
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{ |
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$this->precision = -1; |
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$this->ellipsoid = $ellipsoid ? : null; |
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$this->checkGeometriesArray($geometries); |
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parent::__construct($geometries); |
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} |
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/** |
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* @return string |
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*/ |
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abstract public function getGeometryType(); |
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/** |
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* @return integer |
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*/ |
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public function getPrecision() |
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{ |
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return $this->precision; |
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} |
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/** |
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* @return Coordinate |
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*/ |
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public function getCoordinate() |
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{ |
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if ($this->isEmpty()) { |
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return null; |
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} |
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return $this->offsetGet(0)->getCoordinate(); |
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} |
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/** |
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* @return CoordinateCollection |
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*/ |
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public function getCoordinates() |
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{ |
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$coordinates = new CoordinateCollection(array(), $this->ellipsoid); |
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/** @var GeometryInterface $element */ |
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foreach ($this->elements as $element) { |
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$coordinates = $coordinates->merge($element->getCoordinates()); |
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} |
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return $coordinates; |
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} |
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/** |
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* @return boolean |
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*/ |
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public function isEmpty() |
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{ |
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return count($this->elements) === 0 ; |
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} |
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/** |
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* @return BoundingBoxInterface |
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*/ |
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public function getBoundingBox() |
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{ |
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$boundingBox = new BoundingBox(); |
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/** @var GeometryInterface $element */ |
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foreach ($this->elements as $element) { |
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$boundingBox = $boundingBox->merge($element->getBoundingBox()); |
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} |
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return $boundingBox; |
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} |
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/** |
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* @param string $key |
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* |
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* @param GeometryInterface $value |
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*/ |
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public function set($key, $value) |
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{ |
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$this->checkEllipsoid($value); |
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$this->elements[$key] = $value; |
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} |
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/** |
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* @param GeometryInterface $value |
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* |
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* @return bool |
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*/ |
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public function add($value) |
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{ |
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$this->checkEllipsoid($value); |
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$this->elements[] = $value; |
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return true; |
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} |
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/** |
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* @return Ellipsoid |
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*/ |
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public function getEllipsoid() |
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{ |
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return $this->ellipsoid; |
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} |
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/** |
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* @param array GeometryInterface[] $geometries |
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*/ |
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private function checkGeometriesArray(array $geometries) |
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{ |
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foreach ($geometries as $geometry) { |
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if (!$geometry instanceof GeometryInterface) { |
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throw new InvalidArgumentException("You didn't provide a geometry!"); |
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} |
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$this->checkEllipsoid($geometry); |
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} |
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} |
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/** |
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* @param GeometryInterface $geometry |
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* |
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* @throws InvalidArgumentException |
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*/ |
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private function checkEllipsoid(GeometryInterface $geometry) |
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{ |
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if (bccomp($geometry->getPrecision(), $this->precision) === 1) { |
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$this->precision = $geometry->getPrecision(); |
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} |
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if ($this->ellipsoid === null) { |
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$this->ellipsoid = $geometry->getEllipsoid(); |
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} elseif ($geometry->isEmpty() || $geometry->getEllipsoid() != $this->ellipsoid) { |
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throw new InvalidArgumentException("Geometry is invalid"); |
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} |
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} |
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/** |
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* @param ArrayCollection $collection |
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* |
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* @return ArrayCollection |
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*/ |
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public function merge(ArrayCollection $collection) |
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{ |
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if (!$collection instanceof GeometryCollection || $collection->getGeometryType() !== $this->getGeometryType()) { |
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throw new InvalidArgumentException("Collections types don't match, you can't merge."); |
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} |
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return parent::merge($collection); |
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} |
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} |
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thephpleague /
geotools
