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RelationMap.php
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RelationMap.php
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<?php
/**
* Cycle ORM Schema Builder.
*
* @license MIT
* @author Anton Titov (Wolfy-J)
*/
declare(strict_types=1);
namespace Cycle\Schema\Definition\Map;
use Cycle\Schema\Definition\Relation;
use Cycle\Schema\Exception\RelationException;
final class RelationMap implements \IteratorAggregate
{
/** @var Relation[] */
private $relations = [];
/**
* Cloning.
*/
public function __clone()
{
foreach ($this->relations as $name => $relation) {
$this->relations[$name] = clone $relation;
}
}
/**
* @param string $name
* @return bool
*/
public function has(string $name): bool
{
return isset($this->relations[$name]);
}
/**
* @param string $name
* @return Relation
*/
public function get(string $name): Relation
{
if (!$this->has($name)) {
throw new RelationException("Undefined relation `{$name}`");
}
return $this->relations[$name];
}
/**
* @param string $name
* @param Relation $relation
* @return RelationMap
*/
public function set(string $name, Relation $relation): self
{
if ($this->has($name)) {
throw new RelationException("Relation `{$name}` already exists");
}
$this->relations[$name] = $relation;
return $this;
}
/**
* @param string $name
* @return RelationMap
*/
public function remove(string $name): self
{
unset($this->relations[$name]);
return $this;
}
/**
* @return Relation[]|\Traversable
*/
public function getIterator()
{
return new \ArrayIterator($this->relations);
}
}