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<?php |
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namespace GuilleGF\PHPTools\Collection; |
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/** |
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* An ArrayCollection is a Collection implementation that wraps a regular PHP array. |
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* |
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* Warning: Using (un-)serialize() on a collection is not a supported use-case |
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* and may break when we change the internals in the future. If you need to |
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* serialize a collection use {@link toArray()} and reconstruct the collection |
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* manually. |
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* |
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* @author Guillermo Gonzalez <[email protected]> |
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*/ |
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abstract class Collection implements \Countable, \Iterator, \ArrayAccess |
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{ |
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/** @var array */ |
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private $elements; |
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/** |
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* Collection constructor. |
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* @param array $elements |
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*/ |
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public function __construct(array $elements) |
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{ |
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if (empty($elements)) { |
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throw new \InvalidArgumentException('Collection can not be empty'); |
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} |
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foreach ($this->elements as $element) { |
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$this->add($element); |
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} |
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} |
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/** |
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* @param $element |
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*/ |
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public function add($element) |
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{ |
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if (!$this->isValid($element)) { |
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throw new \UnexpectedValueException('Element is invalid'); |
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} |
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$this->elements[] = $element; |
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} |
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/** |
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* @param $key |
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* @param $element |
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*/ |
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public function set($key, $element) |
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{ |
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if (!$this->isValid($element)) { |
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throw new \UnexpectedValueException('Element is invalid'); |
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} |
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$this->elements[$key] = $element; |
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} |
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/** |
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* @param $element |
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* @return bool |
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*/ |
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public function isValid($element): bool |
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{ |
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return true; |
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} |
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/** |
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* @return bool |
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*/ |
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public function isEmpty(): bool |
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{ |
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return empty($this->elements); |
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} |
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/** |
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* @return array |
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*/ |
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public function keys() |
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{ |
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return array_keys($this->elements); |
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} |
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/** |
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* @return array |
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*/ |
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public function values() |
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{ |
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return array_values($this->elements); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function first() |
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{ |
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return reset($this->elements); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function last() |
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{ |
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return end($this->elements); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function current() |
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{ |
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return current($this->elements); |
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} |
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public function next() |
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{ |
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next($this->elements); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function key() |
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{ |
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return key($this->elements); |
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} |
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/** |
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* @return bool |
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*/ |
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public function valid(): bool |
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{ |
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return key($this->elements) !== null; |
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} |
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public function rewind() |
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{ |
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reset($this->elements); |
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} |
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/** |
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* @param mixed $offset |
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* @return bool |
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*/ |
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public function offsetExists($offset) |
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{ |
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return isset($this->elements[$offset]); |
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} |
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/** |
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* @param mixed $offset |
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* @return mixed|null |
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*/ |
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public function offsetGet($offset) |
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{ |
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return isset($this->elements[$offset]) ? $this->elements[$offset] : null; |
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} |
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/** |
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* @param mixed $offset |
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* @param mixed $value |
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*/ |
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public function offsetSet($offset, $value) |
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{ |
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if (!isset($offset)) { |
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$this->add($value); |
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} |
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$this->set($offset, $value); |
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} |
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/** |
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* @param mixed $offset |
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*/ |
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public function offsetUnset($offset) |
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{ |
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unset($this->elements[$offset]); |
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} |
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/** |
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* @return int |
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*/ |
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public function count(): int |
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{ |
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return count($this->elements); |
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} |
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} |
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GuilleGF /
PHP-Tools
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.