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<?php
/*
* Copyright 2010-2011 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
/*%******************************************************************************************%*/
// CLASS
/**
* The <CFArray> object extends PHP's built-in <php:ArrayObject> object by providing convenience methods for
* rapidly manipulating array data. Specifically, the `CFArray` object is intended for working with
* <CFResponse> and <CFSimpleXML> objects that are returned by AWS services.
*
* @version 2011.06.03
* @license See the included NOTICE.md file for more information.
* @copyright See the included NOTICE.md file for more information.
* @link http://aws.amazon.com/php/ PHP Developer Center
* @link http://php.net/ArrayObject ArrayObject
*/
class CFArray extends ArrayObject
{
/**
* Constructs a new instance of <CFArray>.
*
* @param mixed $input (Optional) The input parameter accepts an array or an Object. The default value is an empty array.
* @param integer $flags (Optional) Flags to control the behavior of the ArrayObject object. Defaults to <STD_PROP_LIST>.
* @param string $iterator_class (Optional) Specify the class that will be used for iteration of the <php:ArrayObject> object. <php:ArrayIterator> is the default class used.
* @return mixed Either an array of matches, or a single <CFSimpleXML> element.
*/
public function __construct($input = array(), $flags = self::STD_PROP_LIST, $iterator_class = 'ArrayIterator')
{
return parent::__construct($input, $flags, $iterator_class);
}
/**
* Alternate approach to constructing a new instance. Supports chaining.
*
* @param mixed $input (Optional) The input parameter accepts an array or an Object. The default value is an empty array.
* @param integer $flags (Optional) Flags to control the behavior of the ArrayObject object. Defaults to <STD_PROP_LIST>.
* @param string $iterator_class (Optional) Specify the class that will be used for iteration of the <php:ArrayObject> object. <php:ArrayIterator> is the default class used.
* @return mixed Either an array of matches, or a single <CFSimpleXML> element.
*/
public static function init($input = array(), $flags = self::STD_PROP_LIST, $iterator_class = 'ArrayIterator')
{
if (version_compare(PHP_VERSION, '5.3.0', '<'))
{
throw new Exception('PHP 5.3 or newer is required to instantiate a new class with CLASS::init().');
}
$self = get_called_class();
return new $self($input, $flags, $iterator_class);
}
/**
* Handles how the object is rendered when cast as a string.
*
* @return string The word "Array".
*/
public function __toString()
{
return 'Array';
}
/*%******************************************************************************************%*/
// REFORMATTING
/**
* Maps each element in the <CFArray> object as an integer.
*
* @return array The contents of the <CFArray> object mapped as integers.
*/
public function map_integer()
{
return array_map('intval', $this->getArrayCopy());
}
/**
* Maps each element in the CFArray object as a string.
*
* @param string $pcre (Optional) A Perl-Compatible Regular Expression (PCRE) to filter the names against.
* @return array The contents of the <CFArray> object mapped as strings. If there are no results, the method will return an empty array.
*/
public function map_string($pcre = null)
{
$list = array_map('strval', $this->getArrayCopy());
$dlist = array();
if ($pcre)
{
foreach ($list as $item)
{
$dlist[] = preg_match($pcre, $item) ? $item : null;
}
$list = array_values(array_filter($dlist));
}
return $list;
}
/*%******************************************************************************************%*/
// CONFIRMATION
/**
* Verifies that _all_ responses were successful. A single failed request will cause <areOK()> to return false. Equivalent to <CFResponse::isOK()>, except it applies to all responses.
*
* @return boolean Whether _all_ requests were successful or not.
*/
public function areOK()
{
$dlist = array();
$list = $this->getArrayCopy();
foreach ($list as $response)
{
if ($response instanceof CFResponse)
{
$dlist[] = $response->isOK();
}
}
return (array_search(false, $dlist, true) !== false) ? false : true;
}
/*%******************************************************************************************%*/
// ITERATING AND EXECUTING
/**
* Iterates over a <CFArray> object, and executes a function for each matched element.
*
* The callback function takes three parameters: <ul>
* <li><code>$item</code> - <code>mixed</code> - Optional - The individual node in the array.</li>
* <li><code>$key</code> - <code>mixed</code> - Optional - The key for the array node.</li>
* <li><code>$bind</code> - <code>mixed</code> - Optional - The variable that was passed into the $bind parameter.</li></ul>
*
* @param string|function $callback (Required) The callback function to execute. PHP 5.3 or newer can use an anonymous function.
* @param mixed $bind (Optional) A variable from the calling scope to pass-by-reference into the local scope of the callback function.
* @return CFArray The original <CFArray> object.
*/
public function each($callback, &$bind = null)
{
$items = $this->getArrayCopy();
foreach ($items as $key => &$item)
{
$callback($item, $key, $bind);
}
return $this;
}
/**
* Passes each element in the current <CFArray> object through a function, and produces a new <CFArray> object containing the return values.
*
* The callback function takes three parameters: <ul>
* <li><code>$item</code> - <code>mixed</code> - Optional - The individual node in the array.</li>
* <li><code>$key</code> - <code>mixed</code> - Optional - The key for the array node.</li>
* <li><code>$bind</code> - <code>mixed</code> - Optional - The variable that was passed into the $bind parameter.</li></ul>
*
* @param string|function $callback (Required) The callback function to execute. PHP 5.3 or newer can use an anonymous function.
* @param mixed $bind (Optional) A variable from the calling scope to pass-by-reference into the local scope of the callback function.
* @return CFArray A new <CFArray> object containing the return values.
*/
public function map($callback, &$bind = null)
{
$items = $this->getArrayCopy();
$collect = array();
foreach ($items as $key => &$item)
{
$collect[] = $callback($item, $key, $bind);
}
return new CFArray($collect);
}
/**
* Filters the list of nodes by passing each value in the current <CFArray> object through a function. The node will be removed if the function returns `false`.
*
* The callback function takes three parameters: <ul>
* <li><code>$item</code> - <code>mixed</code> - Optional - The individual node in the array.</li>
* <li><code>$key</code> - <code>mixed</code> - Optional - The key for the array node.</li>
* <li><code>$bind</code> - <code>mixed</code> - Optional - The variable that was passed into the $bind parameter.</li></ul>
*
* @param string|function $callback (Required) The callback function to execute. PHP 5.3 or newer can use an anonymous function.
* @param mixed $bind (Optional) A variable from the calling scope to pass-by-reference into the local scope of the callback function.
* @return CFArray A new <CFArray> object containing the return values.
*/
public function filter($callback, &$bind = null)
{
$items = $this->getArrayCopy();
$collect = array();
foreach ($items as $key => &$item)
{
if ($callback($item, $key, $bind) !== false)
{
$collect[] = $item;
}
}
return new CFArray($collect);
}
/**
* Alias for <filter()>. This functionality was incorrectly named _reduce_ in earlier versions of the SDK.
*
* @param string|function $callback (Required) The callback function to execute. PHP 5.3 or newer can use an anonymous function.
* @param mixed $bind (Optional) A variable from the calling scope to pass-by-reference into the local scope of the callback function.
* @return CFArray A new <CFArray> object containing the return values.
*/
public function reduce($callback, &$bind = null)
{
return $this->filter($callback, $bind);
}
/*%******************************************************************************************%*/
// TRAVERSAL
/**
* Gets the first result in the array.
*
* @return mixed The first result in the <CFArray> object. Returns `false` if there are no items in the array.
*/
public function first()
{
$items = $this->getArrayCopy();
return count($items) ? $items[0] : false;
}
/**
* Gets the last result in the array.
*
* @return mixed The last result in the <CFArray> object. Returns `false` if there are no items in the array.
*/
public function last()
{
$items = $this->getArrayCopy();
return count($items) ? end($items) : false;
}
/**
* Removes all `null` values from an array.
*
* @return CFArray A new <CFArray> object containing the non-null values.
*/
public function compress()
{
return new CFArray(array_filter($this->getArrayCopy()));
}
/**
* Reindexes the array, starting from zero.
*
* @return CFArray A new <CFArray> object with indexes starting at zero.
*/
public function reindex()
{
return new CFArray(array_values($this->getArrayCopy()));
}
/*%******************************************************************************************%*/
// ALTERNATE FORMATS
/**
* Gets the current XML node as a JSON string.
*
* @return string The current XML node as a JSON string.
*/
public function to_json()
{
return json_encode($this->getArrayCopy());
}
/**
* Gets the current XML node as a YAML string.
*
* @return string The current XML node as a YAML string.
*/
public function to_yaml()
{
return sfYaml::dump($this->getArrayCopy(), 5);
}
}