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<?php namespace Mbh\Collection\Traits\Sequenceable\LinkedList; |
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/** |
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* MBHFramework |
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* |
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* @link https://github.com/MBHFramework/mbh-framework |
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* @copyright Copyright (c) 2017 Ulises Jeremias Cornejo Fandos |
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* @license https://github.com/MBHFramework/mbh-framework/blob/master/LICENSE (MIT License) |
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*/ |
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use Mbh\Collection\Internal\Interfaces\LinkedNode; |
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use Mbh\Collection\Internal\LinkedDataNode; |
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use Traversable; |
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use OutOfBoundsException; |
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use OutOfRangeException; |
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trait ArrayAccess |
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{ |
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protected $current; |
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protected $offset = -1; |
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/** |
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* @link http://php.net/manual/en/arrayaccess.offsetexists.php |
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* @param int $offset |
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* @return boolean |
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*/ |
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public function offsetExists($offset) |
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{ |
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$index = $this->intGuard($offset); |
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return $index >= 0 && $index < $this->count(); |
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} |
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/** |
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* @link http://php.net/manual/en/arrayaccess.offsetget.php |
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* @param int $offset |
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* @return mixed |
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* @throws OutOfBoundsException |
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*/ |
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public function offsetGet($offset) |
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{ |
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$n = $this->guardedSeek($offset, __METHOD__); |
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return $n->value(); |
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} |
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/** |
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* @link http://php.net/manual/en/arrayaccess.offsetset.php |
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* @param int|null $offset |
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* @param mixed $value |
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* @return void |
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* @throws OutOfBoundsException |
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*/ |
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public function offsetSet($offset, $value) |
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{ |
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if ($offset === null) { |
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$this->push($value); |
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return; |
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} |
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$n = $this->guardedSeek($offset, __METHOD__); |
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$n->setValue($value); |
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} |
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/** |
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* @link http://php.net/manual/en/arrayaccess.offsetunset.php |
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* @param int $offset |
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* @return void |
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*/ |
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public function offsetUnset($offset) |
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{ |
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$index = $this->intGuard($offset); |
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if ($this->offsetExists($index)) { |
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$n = $this->seekTo($index); |
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$this->removeNode($n); |
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$this->current = $n->prev(); |
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$this->offset--; |
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} |
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} |
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/** |
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* @link http://php.net/manual/en/countable.count.php |
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* @return int |
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*/ |
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abstract public function count(): int; |
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/** |
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* @param mixed $i |
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* @return int |
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* @throws Exception |
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*/ |
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abstract protected function intGuard($i); |
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abstract protected function guardedSeek($index, $method); |
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abstract public function push(...$values); |
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abstract protected function removeNode(LinkedNode $n); |
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/** |
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* @param $offset |
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* @return LinkedDataNode |
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*/ |
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abstract protected function seekTo($offset); |
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} |
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MBHFramework /
structures
