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File: stepconfig.class.php
<?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; } }