55 lines
1.4 KiB
PHP
55 lines
1.4 KiB
PHP
<?php
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/**
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* Copyright 2010-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License").
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* You may not use this file except in compliance with the License.
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* A copy of the License is located at
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*
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* http://aws.amazon.com/apache2.0
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*
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* or in the "license" file accompanying this file. This file is distributed
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* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
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* express or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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namespace Aws\Common;
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/**
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* Represents an enumerable set of values
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*/
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abstract class Enum
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{
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/**
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* @var array A cache of all enum values to increase performance
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*/
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protected static $cache = array();
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/**
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* Returns the names (or keys) of all of constants in the enum
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*
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* @return array
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*/
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public static function keys()
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{
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return array_keys(static::values());
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}
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/**
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* Return the names and values of all the constants in the enum
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*
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* @return array
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*/
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public static function values()
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{
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$class = get_called_class();
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if (!isset(self::$cache[$class])) {
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$reflected = new \ReflectionClass($class);
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self::$cache[$class] = $reflected->getConstants();
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}
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return self::$cache[$class];
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}
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}
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