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/**
 *
 * Copyright (C) 2010 Cloud Conscious, LLC. 
 *
 * ====================================================================
 * 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://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.aws.ec2.domain;

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

/**
 * @author Adrian Cole
 * 
 */
public enum IpProtocol {

   TCP, UDP, ICMP, UNRECOGNIZED;

   public String value() {
      return name().toLowerCase();
   }

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

   public static IpProtocol fromValue(String protocol) {
      try {
         return valueOf(checkNotNull(protocol, "protocol").toUpperCase());
      } catch (IllegalArgumentException e) {
         return UNRECOGNIZED;
      }
   }

}