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The Amazon Web Services SDK for Java provides Java APIs for building software on AWS' cost-effective, scalable, and reliable infrastructure products. The AWS Java SDK allows developers to code against APIs for all of Amazon's infrastructure web services (Amazon S3, Amazon EC2, Amazon SQS, Amazon Relational Database Service, Amazon AutoScaling, etc).

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/*
 * Copyright 2013-2014 Amazon Technologies, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *    http://aws.amazon.com/apache2.0
 *
 * 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.
 */
package com.amazonaws.regions;

/**
 * Enumeration of region names
 */
public enum Regions {

    GovCloud("us-gov-west-1"), 
    US_EAST_1("us-east-1"), 
    US_WEST_1("us-west-1"), 
    US_WEST_2("us-west-2"), 
    EU_WEST_1("eu-west-1"),
    AP_SOUTHEAST_1("ap-southeast-1"), 
    AP_SOUTHEAST_2("ap-southeast-2"), 
    AP_NORTHEAST_1("ap-northeast-1"), 
    SA_EAST_1("sa-east-1"),
    CN_NORTH_1("cn-north-1");
    
    /**
     * The default region that new customers in the US are encouraged to use
     * when using AWS services for the first time.
     */
    public static final Regions DEFAULT_REGION = US_WEST_2;
    
    private final String name;

    private Regions(String name) {
        this.name = name;
    }

    /**
     * The name of this region, used in the regions.xml file to identify it.
     */
    public String getName() {
        return name;
    }
    
    /**
     * Returns a region enum corresponding to the given region name.
     * 
     * @param regionName
     *            The name of the region. Ex.: eu-west-1
     * @return Region enum representing the given region name.
     */
    public static Regions fromName(String regionName) {
        for (Regions region : Regions.values()) {
            if (regionName.equals(region.getName())) {
                return region;
            }
        }
        throw new IllegalArgumentException("Cannot create enum from " + regionName + " value!");
    } 
    
}