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<?php
/**
* This file is part of the ramsey/collection library
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
* @license http://opensource.org/licenses/MIT MIT
*/
declare(strict_types=1);
namespace Ramsey\Collection;
/**
* A set is a collection that contains no duplicate elements.
*
* Great care must be exercised if mutable objects are used as set elements.
* The behavior of a set is not specified if the value of an object is changed
* in a manner that affects equals comparisons while the object is an element in
* the set.
*
* Example usage:
*
* ``` php
* $foo = new \My\Foo();
* $set = new Set(\My\Foo::class);
*
* $set->add($foo); // returns TRUE, the element don't exists
* $set->add($foo); // returns FALSE, the element already exists
*
* $bar = new \My\Foo();
* $set->add($bar); // returns TRUE, $bar !== $foo
* ```
*/
class Set extends AbstractSet
{
/**
* The type of elements stored in this set
*
* A set's type is immutable. For this reason, this property is private.
*
* @var string
*/
private $setType;
/**
* Constructs a set object of the specified type, optionally with the
* specified data.
*
* @param string $setType The type (FQCN) associated with this set.
* @param mixed[] $data The initial items to store in the set.
*/
public function __construct(string $setType, array $data = [])
{
$this->setType = $setType;
parent::__construct($data);
}
/**
* Returns the type associated with this set.
*/
public function getType(): string
{
return $this->setType;
}
}
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