org.jclouds.aws.ec2.domain.PublicIpInstanceIdPair Maven / Gradle / Ivy

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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;

import com.google.inject.internal.Nullable;

/**
 * 
 * @see 
 * @author Adrian Cole
 */
public class PublicIpInstanceIdPair implements Comparable {

   private final String region;
   @Nullable
   private final String instanceId;
   private final String publicIp;

   public PublicIpInstanceIdPair(String region, String publicIp, @Nullable String instanceId) {
      this.region = checkNotNull(region, "region");
      this.instanceId = instanceId;
      this.publicIp = checkNotNull(publicIp, "publicIp");
   }

   /**
    * Elastic IP addresses are tied to a Region and cannot be mapped across Regions.
    */
   public String getRegion() {
      return region;
   }

   /**
    * {@inheritDoc}
    */
   public int compareTo(PublicIpInstanceIdPair o) {
      return (this == o) ? 0 : getPublicIp().compareTo(o.getPublicIp());
   }

   /**
    * The ID of the instance.
    */
   public String getInstanceId() {
      return instanceId;
   }

   /**
    * The public IP address.
    */
   public String getPublicIp() {
      return publicIp;
   }

   @Override
   public int hashCode() {
      final int prime = 31;
      int result = 1;
      result = prime * result + ((instanceId == null) ? 0 : instanceId.hashCode());
      result = prime * result + ((publicIp == null) ? 0 : publicIp.hashCode());
      result = prime * result + ((region == null) ? 0 : region.hashCode());
      return result;
   }

   @Override
   public boolean equals(Object obj) {
      if (this == obj)
         return true;
      if (obj == null)
         return false;
      if (getClass() != obj.getClass())
         return false;
      PublicIpInstanceIdPair other = (PublicIpInstanceIdPair) obj;
      if (instanceId == null) {
         if (other.instanceId != null)
            return false;
      } else if (!instanceId.equals(other.instanceId))
         return false;
      if (publicIp == null) {
         if (other.publicIp != null)
            return false;
      } else if (!publicIp.equals(other.publicIp))
         return false;
      if (region == null) {
         if (other.region != null)
            return false;
      } else if (!region.equals(other.region))
         return false;
      return true;
   }

}