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<?php
namespace Braintree;
use Countable;
use IteratorAggregate;
use ArrayAccess;
use OutOfRangeException;
use ArrayIterator;
/**
* Braintree Generic collection
*
* Based on Generic Collection class from:
* {@link http://codeutopia.net/code/library/CU/Collection.php}
*
* @package Braintree
* @subpackage Utility
*/
class Collection implements Countable, IteratorAggregate, ArrayAccess
{
/**
*
* @var array collection storage
*/
protected $_collection = [];
/**
* Add a value into the collection
* @param string $value
*/
public function add($value)
{
$this->_collection[] = $value;
}
/**
* Set index's value
* @param integer $index
* @param mixed $value
* @throws OutOfRangeException
*/
public function set($index, $value)
{
if($index >= $this->count())
throw new OutOfRangeException('Index out of range');
$this->_collection[$index] = $value;
}
/**
* Remove a value from the collection
* @param integer $index index to remove
* @throws OutOfRangeException if index is out of range
*/
public function remove($index)
{
if($index >= $this->count())
throw new OutOfRangeException('Index out of range');
array_splice($this->_collection, $index, 1);
}
/**
* Return value at index
* @param integer $index
* @return mixed
* @throws OutOfRangeException
*/
public function get($index)
{
if($index >= $this->count())
throw new OutOfRangeException('Index out of range');
return $this->_collection[$index];
}
/**
* Determine if index exists
* @param integer $index
* @return boolean
*/
public function exists($index)
{
if($index >= $this->count())
return false;
return true;
}
/**
* Return count of items in collection
* Implements countable
* @return integer
*/
public function count()
{
return count($this->_collection);
}
/**
* Return an iterator
* Implements IteratorAggregate
* @return ArrayIterator
*/
public function getIterator()
{
return new ArrayIterator($this->_collection);
}
/**
* Set offset to value
* Implements ArrayAccess
* @see set
* @param integer $offset
* @param mixed $value
*/
public function offsetSet($offset, $value)
{
$this->set($offset, $value);
}
/**
* Unset offset
* Implements ArrayAccess
* @see remove
* @param integer $offset
*/
public function offsetUnset($offset)
{
$this->remove($offset);
}
/**
* get an offset's value
* Implements ArrayAccess
* @see get
* @param integer $offset
* @return mixed
*/
public function offsetGet($offset)
{
return $this->get($offset);
}
/**
* Determine if offset exists
* Implements ArrayAccess
* @see exists
* @param integer $offset
* @return boolean
*/
public function offsetExists($offset)
{
return $this->exists($offset);
}
}