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| <?php | |
| // Copyright (c) Lellys Informática. All rights reserved. See License.txt in the project root for license information. | |
| namespace Easy\Collections; | |
| use BadFunctionCallException; | |
| use Easy\Collections\CollectionArray; | |
| /** | |
| * Represents a simple last-in-first-out (LIFO) non-generic collection of objects. | |
| */ | |
| class Stack extends CollectionArray implements IStack | |
| { | |
| /** | |
| * Inserts an object at the top of the Stack. | |
| * @param type $item The Object to push onto the Stack. The value <b>can</b> be null. | |
| */ | |
| public function push($item) | |
| { | |
| array_push($this->array, $item); | |
| return $this; | |
| } | |
| /** | |
| * Inserts multiples objects at the top of the Stack. | |
| * @param type $item The Objects to push onto the Stack. The value <b>can</b> be null. | |
| */ | |
| public function pushMultiple($items) | |
| { | |
| $this->addMultiple($items); | |
| return $this; | |
| } | |
| /** | |
| * Removes and returns the object at the top of the Stack. | |
| * @return mixed The Object removed from the top of the Stack. | |
| * @throws BadFunctionCallException | |
| */ | |
| public function pop() | |
| { | |
| if ($this->isEmpty()) { | |
| throw new BadFunctionCallException(__('Cannot use method Pop on an empty Stack')); | |
| } | |
| return array_pop($this->array); | |
| } | |
| /** | |
| * Returns the object at the top of the Stack without removing it. | |
| * @return mixed The Object at the top of the Stack. | |
| * @throws BadFunctionCallException | |
| */ | |
| public function peek() | |
| { | |
| if ($this->isEmpty()) { | |
| throw new BadFunctionCallException(__('Cannot use method Peek on an empty Stack')); | |
| } | |
| return end($this->array); | |
| } | |
| } |