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<?php
/**
* This file is part of the ramsey/collection library
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
* @license http://opensource.org/licenses/MIT MIT
*/
declare(strict_types=1);
namespace Ramsey\Collection\Map;
use Ramsey\Collection\ArrayInterface;
/**
* An object that maps keys to values.
*
* A map cannot contain duplicate keys; each key can map to at most one value.
*/
interface MapInterface extends ArrayInterface
{
/**
* Returns `true` if this map contains a mapping for the specified key.
*
* @param mixed $key The key to check in the map.
*/
public function containsKey($key): bool;
/**
* Returns `true` if this map maps one or more keys to the specified value.
*
* This performs a strict type check on the value.
*
* @param mixed $value The value to check in the map.
*/
public function containsValue($value): bool;
/**
* Return an array of the keys contained in this map.
*
* @return mixed[]
*/
public function keys(): array;
/**
* Returns the value to which the specified key is mapped, `null` if this
* map contains no mapping for the key, or (optionally) `$defaultValue` if
* this map contains no mapping for the key.
*
* @param mixed $key The key to return from the map.
* @param mixed $defaultValue The default value to use if `$key` is not found.
*
* @return mixed|null the value or `null` if the key could not be found.
*/
public function get($key, $defaultValue = null);
/**
* Associates the specified value with the specified key in this map.
*
* If the map previously contained a mapping for the key, the old value is
* replaced by the specified value.
*
* @param mixed $key The key to put or replace in the map.
* @param mixed $value The value to store at `$key`.
*
* @return mixed|null the previous value associated with key, or `null` if
* there was no mapping for `$key`.
*/
public function put($key, $value);
/**
* Associates the specified value with the specified key in this map only if
* it is not already set.
*
* If there is already a value associated with `$key`, this returns that
* value without replacing it.
*
* @param mixed $key The key to put in the map.
* @param mixed $value The value to store at `$key`.
*
* @return mixed|null the previous value associated with key, or `null` if
* there was no mapping for `$key`.
*/
public function putIfAbsent($key, $value);
/**
* Removes the mapping for a key from this map if it is present.
*
* @param mixed $key The key to remove from the map.
*
* @return mixed|null the previous value associated with key, or `null` if
* there was no mapping for `$key`.
*/
public function remove($key);
/**
* Removes the entry for the specified key only if it is currently mapped to
* the specified value.
*
* This performs a strict type check on the value.
*
* @param mixed $key The key to remove from the map.
* @param mixed $value The value to match.
*
* @return bool true if the value was removed.
*/
public function removeIf($key, $value): bool;
/**
* Replaces the entry for the specified key only if it is currently mapped
* to some value.
*
* @param mixed $key The key to replace.
* @param mixed $value The value to set at `$key`.
*
* @return mixed|null the previous value associated with key, or `null` if
* there was no mapping for `$key`.
*/
public function replace($key, $value);
/**
* Replaces the entry for the specified key only if currently mapped to the
* specified value.
*
* This performs a strict type check on the value.
*
* @param mixed $key The key to remove from the map.
* @param mixed $oldValue The value to match.
* @param mixed $newValue The value to use as a replacement.
*
* @return bool true if the value was replaced.
*/
public function replaceIf($key, $oldValue, $newValue): bool;
}
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