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<?php |
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|
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/** |
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* This file is part of the ramsey/collection library |
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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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* @copyright Copyright (c) Ben Ramsey <[email protected]> |
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* @license http://opensource.org/licenses/MIT MIT |
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*/ |
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|
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declare(strict_types=1); |
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|
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namespace Ramsey\Collection; |
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|
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/** |
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* A collection represents a group of objects. |
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* |
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* Each object in the collection is of a specific, defined type. |
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* |
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* This is a direct implementation of `CollectionInterface`, provided for |
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* the sake of convenience. |
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* |
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* Example usage: |
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* |
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* ``` php |
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* $collection = new \Ramsey\Collection\Collection('My\\Foo'); |
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* $collection->add(new \My\Foo()); |
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* $collection->add(new \My\Foo()); |
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* |
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* foreach ($collection as $foo) { |
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* // Do something with $foo |
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* } |
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* ``` |
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* |
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* It is preferable to subclass `AbstractCollection` to create your own typed |
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* collections. For example: |
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* |
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* ``` php |
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* namespace My\Foo; |
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* |
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* class FooCollection extends \Ramsey\Collection\AbstractCollection |
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* { |
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* public function getType() |
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* { |
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* return 'My\\Foo'; |
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* } |
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* } |
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* ``` |
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* |
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* And then use it similarly to the earlier example: |
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* |
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* ``` php |
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* $fooCollection = new \My\Foo\FooCollection(); |
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* $fooCollection->add(new \My\Foo()); |
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* $fooCollection->add(new \My\Foo()); |
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* |
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* foreach ($fooCollection as $foo) { |
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* // Do something with $foo |
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* } |
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* ``` |
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* |
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* The benefit with this approach is that you may do type-checking on the |
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* collection object: |
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* |
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* ``` php |
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* if ($collection instanceof \My\Foo\FooCollection) { |
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* // the collection is a collection of My\Foo objects |
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* } |
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* ``` |
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* |
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* @template T |
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* @extends AbstractCollection<T> |
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*/ |
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class Collection extends AbstractCollection |
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{ |
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/** |
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* The type of elements stored in this collection. |
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* |
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* A collection's type is immutable once it is set. For this reason, this |
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* property is set private. |
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*/ |
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private string $collectionType; |
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|
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/** |
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* Constructs a collection object of the specified type, optionally with the |
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* specified data. |
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* |
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* @param string $collectionType The type (FQCN) associated with this |
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* collection. |
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* @param array<array-key, T> $data The initial items to store in the collection. |
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*/ |
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public function __construct(string $collectionType, array $data = []) |
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{ |
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$this->collectionType = $collectionType; |
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parent::__construct($data); |
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} |
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|
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public function getType(): string |
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{ |
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return $this->collectionType; |
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} |
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} |
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|
