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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License 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 org.jclouds.ec2.domain;

import static shaded.com.google.common.base.Preconditions.checkNotNull;

import shaded.com.google.common.base.CaseFormat;

public enum InstanceState {

   /**
    * the instance is in the process of being launched
    */
   PENDING,

   /**
    * the instance launched (although the boot process might not be completed)
    */
   RUNNING,

   /**
    * the instance started shutting down
    */
   SHUTTING_DOWN,
   /**
    * the instance terminated
    */
   TERMINATED,
   /**
    * the instance is stopping
    */
   STOPPING,
   /**
    * the instance is stopped
    */
   STOPPED, UNRECOGNIZED;

   public String value() {
      return CaseFormat.UPPER_UNDERSCORE.to(CaseFormat.LOWER_HYPHEN, name());
   }

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

   public static InstanceState fromValue(String state) {
      try {
         return valueOf(CaseFormat.LOWER_HYPHEN.to(CaseFormat.UPPER_UNDERSCORE, checkNotNull(state, "state")));
      } catch (IllegalArgumentException e) {
         return UNRECOGNIZED;
      }
   }

   public static InstanceState fromValue(int v) {
      switch (v) {
         case 0:
            return PENDING;
         case 16:
            return RUNNING;
         case 32:
            return SHUTTING_DOWN;
         case 48:
            return TERMINATED;
         case 64:
            return STOPPING;
         case 80:
            return STOPPED;
         default:
            return UNRECOGNIZED;
      }
   }
}




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