silverstripe-framework/model/List.php

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<?php
/**
* An interface that a class can implement to be treated as a list container.
*
* @package sapphire
* @subpackage model
*/
interface SS_List extends ArrayAccess, Countable, IteratorAggregate {
/**
* Returns all the items in the list in an array.
*
* @return arary
*/
public function toArray();
/**
* Returns the contents of the list as an array of maps.
*
* @return array
*/
public function toNestedArray();
/**
* Returns a subset of the items within the list.
*
* @param int $offset
* @param int $length
* @return SS_List
*/
public function getRange($offset, $length);
/**
* Adds an item to the list, making no guarantees about where it will
* appear.
*
* @param mixed $item
*/
public function add($item);
/**
* Removes an item from the list.
*
* @param mixed $item
*/
public function remove($item);
/**
* Returns the first item in the list.
*
* @return mixed
*/
public function first();
/**
* Returns the last item in the list.
*
* @return mixed
*/
public function last();
/**
* Returns a map of a key field to a value field of all the items in the
* list.
*
* @param string $keyfield
* @param string $titlefield
* @return array
*/
public function map($keyfield, $titlefield);
/**
* Returns the first item in the list where the key field is equal to the
* value.
*
* @param string $key
* @param mixed $value
* @return mixed
*/
public function find($key, $value);
/**
* Returns an array of a single field value for all items in the list.
*
* @param string $field
* @return array
*/
public function column($field);
/**
* Returns TRUE if the list can be sorted by a field.
*
* @param string $by
* @return bool
*/
public function canSortBy($by);
/**
* Sorts the list in place by a field on the items and direction.
*
* @param string $by The field name to sort by.
* @param string $dir Either "ASC" or "DIR".
*/
public function sort($by, $dir = 'ASC');
}