Subversion-Projekte lars-tiefland.php_share

<?php
/*
 * Copyright 2010-2012 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;
        }
}