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<?php
/*
* Copyright 2010-2013 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
/**
* Contains functionality for simplifying Amazon EMR Hadoop steps.
*
* @version 2010.11.16
* @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
*/
class CFStepConfig
{
/**
* Stores the configuration map.
*/
public $config;
/**
* Constructs a new instance of this class.
*
* @param array $config (Required) An associative array representing the Hadoop step configuration.
* @return $this A reference to the current instance.
*/
public function __construct($config)
{
// Handle Hadoop jar arguments
if (isset($config['HadoopJarStep']['Args']) && $args = $config['HadoopJarStep']['Args'])
{
$config['HadoopJarStep']['Args'] = is_array($args) ? $args : array($args);
}
$this->config = $config;
}
/**
* Constructs a new instance of this class, and allows chaining.
*
* @param array $config (Required) An associative array representing the Hadoop step configuration.
* @return $this A reference to the current instance.
*/
public static function init($config)
{
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 $self($config);
}
/**
* Returns a JSON representation of the object when typecast as a string.
*
* @return string A JSON representation of the object.
* @link http://www.php.net/manual/en/language.oop5.magic.php#language.oop5.magic.tostring PHP Magic Methods
*/
public function __toString()
{
return json_encode($this->config);
}
/**
* Returns the configuration data.
*
* @return array The configuration data.
*/
public function get_config()
{
return $this->config;
}
}