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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.openstack.nova.v2_0.domain;

import java.beans.ConstructorProperties;

import javax.inject.Named;

import org.jclouds.javax.annotation.Nullable;

import shaded.com.google.common.base.MoreObjects;
import shaded.com.google.common.base.Objects;
import shaded.com.google.common.base.MoreObjects.ToStringHelper;

/**
 * Additional attributes delivered by Extended Server Status extension (alias "OS-EXT-STS")
 * 
 * @see 
 * @see org.jclouds.openstack.nova.v2_0.features.ExtensionApi#getExtensionByAlias
 * @see org.jclouds.openstack.nova.v1_1.extensions.ExtensionNamespaces#EXTENDED_STATUS (extended status?)
*/
public class ServerExtendedStatus {

   public static Builder builder() { 
      return new ConcreteBuilder();
   }
   
   public Builder toBuilder() { 
      return new ConcreteBuilder().fromServerExtendedStatus(this);
   }

   public abstract static class Builder>  {
      protected abstract T self();

      protected String taskState;
      protected String vmState;
      protected int powerState;
   
      /** 
       * @see ServerExtendedStatus#getTaskState()
       */
      public T taskState(String taskState) {
         this.taskState = taskState;
         return self();
      }

      /** 
       * @see ServerExtendedStatus#getVmState()
       */
      public T vmState(String vmState) {
         this.vmState = vmState;
         return self();
      }

      /** 
       * @see ServerExtendedStatus#getPowerState()
       */
      public T powerState(int powerState) {
         this.powerState = powerState;
         return self();
      }

      public ServerExtendedStatus build() {
         return new ServerExtendedStatus(taskState, vmState, powerState);
      }
      
      public T fromServerExtendedStatus(ServerExtendedStatus in) {
         return this
                  .taskState(in.getTaskState())
                  .vmState(in.getVmState())
                  .powerState(in.getPowerState());
      }
   }

   private static class ConcreteBuilder extends Builder {
      @Override
      protected ConcreteBuilder self() {
         return this;
      }
   }

   @Named("OS-EXT-STS:task_state")
   private final String taskState;
   @Named("OS-EXT-STS:vm_state")
   private final String vmState;
   @Named("OS-EXT-STS:power_state")
   private final int powerState;

   @ConstructorProperties({
      "OS-EXT-STS:task_state", "OS-EXT-STS:vm_state", "OS-EXT-STS:power_state"
   })
   protected ServerExtendedStatus(@Nullable String taskState, @Nullable String vmState, int powerState) {
      this.taskState = taskState;
      this.vmState = vmState;
      this.powerState = powerState;
   }

   @Nullable
   public String getTaskState() {
      return this.taskState;
   }

   @Nullable
   public String getVmState() {
      return this.vmState;
   }

   public int getPowerState() {
      return this.powerState;
   }

   @Override
   public int hashCode() {
      return Objects.hashCode(taskState, vmState, powerState);
   }

   @Override
   public boolean equals(Object obj) {
      if (this == obj) return true;
      if (obj == null || getClass() != obj.getClass()) return false;
      ServerExtendedStatus that = ServerExtendedStatus.class.cast(obj);
      return Objects.equal(this.taskState, that.taskState)
               && Objects.equal(this.vmState, that.vmState)
               && Objects.equal(this.powerState, that.powerState);
   }
   
   protected ToStringHelper string() {
      return MoreObjects.toStringHelper(this)
            .add("taskState", taskState).add("vmState", vmState).add("powerState", powerState);
   }
   
   @Override
   public String toString() {
      return string().toString();
   }

}