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<?php
/**
* Flight: An extensible micro-framework.
*
* @copyright Copyright (c) 2011, Mike Cao <mike@mikecao.com>
* @license MIT, http://flightphp.com/license
*/
namespace flight\util;
/**
* The Collection class allows you to access a set of data
* using both array and object notation.
*/
class Collection implements \ArrayAccess, \Iterator, \Countable {
/**
* Collection data.
*
* @var array
*/
private $data;
/**
* Constructor.
*
* @param array $data Initial data
*/
public function __construct(array $data = array()) {
$this->data = $data;
}
/**
* Gets an item.
*
* @param string $key Key
* @return mixed Value
*/
public function __get($key) {
return isset($this->data[$key]) ? $this->data[$key] : null;
}
/**
* Set an item.
*
* @param string $key Key
* @param mixed $value Value
*/
public function __set($key, $value) {
$this->data[$key] = $value;
}
/**
* Checks if an item exists.
*
* @param string $key Key
* @return bool Item status
*/
public function __isset($key) {
return isset($this->data[$key]);
}
/**
* Removes an item.
*
* @param string $key Key
*/
public function __unset($key) {
unset($this->data[$key]);
}
/**
* Gets an item at the offset.
*
* @param string $offset Offset
* @return mixed Value
*/
public function offsetGet($offset) {
return isset($this->data[$offset]) ? $this->data[$offset] : null;
}
/**
* Sets an item at the offset.
*
* @param string $offset Offset
* @param mixed $value Value
*/
public function offsetSet($offset, $value) {
if (is_null($offset)) {
$this->data[] = $value;
}
else {
$this->data[$offset] = $value;
}
}
/**
* Checks if an item exists at the offset.
*
* @param string $offset Offset
* @return bool Item status
*/
public function offsetExists($offset) {
return isset($this->data[$offset]);
}
/**
* Removes an item at the offset.
*
* @param string $offset Offset
*/
public function offsetUnset($offset) {
unset($this->data[$offset]);
}
/**
* Resets the collection.
*/
public function rewind() {
reset($this->data);
}
/**
* Gets current collection item.
*
* @return mixed Value
*/
public function current() {
return current($this->data);
}
/**
* Gets current collection key.
*
* @return mixed Value
*/
public function key() {
return key($this->data);
}
/**
* Gets the next collection value.
*
* @return mixed Value
*/
public function next()
{
return next($this->data);
}
/**
* Checks if the current collection key is valid.
*
* @return bool Key status
*/
public function valid()
{
$key = key($this->data);
return ($key !== NULL && $key !== FALSE);
}
/**
* Gets the size of the collection.
*
* @return int Collection size
*/
public function count() {
return sizeof($this->data);
}
/**
* Gets the item keys.
*
* @return array Collection keys
*/
public function keys() {
return array_keys($this->data);
}
/**
* Gets the collection data.
*
* @return array Collection data
*/
public function getData() {
return $this->data;
}
/**
* Sets the collection data.
*
* @param array $data New collection data
*/
public function setData(array $data) {
$this->data = $data;
}
/**
* Removes all items from the collection.
*/
public function clear() {
$this->data = array();
}
}
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