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The AWS Java SDK for Amazon EMR module holds the client classes that are used for communicating with Amazon Elastic MapReduce Service

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/*
 * Copyright 2010-2016 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.
 */

package com.amazonaws.services.elasticmapreduce.model;

/**
 * 
 * The type of instance.
 * 
 *  
 * 
 * A small instance
 * 
 *  
 * 
 * A large instance
 * 
 *  
 */
public enum JobFlowExecutionState {

    STARTING("STARTING"),
    BOOTSTRAPPING("BOOTSTRAPPING"),
    RUNNING("RUNNING"),
    WAITING("WAITING"),
    SHUTTING_DOWN("SHUTTING_DOWN"),
    TERMINATED("TERMINATED"),
    COMPLETED("COMPLETED"),
    FAILED("FAILED");

    private String value;

    private JobFlowExecutionState(String value) {
        this.value = value;
    }

    @Override
    public String toString() {
        return this.value;
    }

    /**
     * Use this in place of valueOf.
     *
     * @param value
     *        real value
     * @return JobFlowExecutionState corresponding to the value
     */
    public static JobFlowExecutionState fromValue(String value) {
        if (value == null || "".equals(value)) {
            throw new IllegalArgumentException("Value cannot be null or empty!");
        } else if ("STARTING".equals(value)) {
            return STARTING;
        } else if ("BOOTSTRAPPING".equals(value)) {
            return BOOTSTRAPPING;
        } else if ("RUNNING".equals(value)) {
            return RUNNING;
        } else if ("WAITING".equals(value)) {
            return WAITING;
        } else if ("SHUTTING_DOWN".equals(value)) {
            return SHUTTING_DOWN;
        } else if ("TERMINATED".equals(value)) {
            return TERMINATED;
        } else if ("COMPLETED".equals(value)) {
            return COMPLETED;
        } else if ("FAILED".equals(value)) {
            return FAILED;
        } else {
            throw new IllegalArgumentException("Cannot create enum from "
                    + value + " value!");
        }
    }
}