package org.opentrafficsim.base;
   
   import java.io.Serializable;
   
   import org.djunits.value.vdouble.scalar.Time;
   
   /**
    * An object with a time stamp, where the object is of a specific class.
    * <p>
   * Copyright (c) 2013-2023 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
   * BSD-style license. See <a href="https://opentrafficsim.org/docs/license.html">OpenTrafficSim License</a>.
   * </p>
   * @author <a href="https://github.com/averbraeck">Alexander Verbraeck</a>
   * @author <a href="https://tudelft.nl/staff/p.knoppers-1">Peter Knoppers</a>
   * @param <C> the time stamped object class.
   */
  public class TimeStampedObject<C> implements Serializable
  {
      /** */
      private static final long serialVersionUID = 20160129L;
  
      /** The object. */
      private final C object;
  
      /** The time stamp. */
      private final Time timestamp;
  
      /**
       * Construct a new TimeStampedObject.
       * @param object C; the object.
       * @param timestamp Time; the time stamp.
       */
      public TimeStampedObject(final C object, final Time timestamp)
      {
          this.object = object;
          this.timestamp = timestamp;
      }
  
      /**
       * Retrieve the object.
       * @return C; the object
       */
      public final C getObject()
      {
          return this.object;
      }
  
      /**
       * Retrieve the time stamp.
       * @return Time; the time stamp
       */
      public final Time getTimestamp()
      {
          return this.timestamp;
      }
  
      /** {@inheritDoc} */
      @Override
      public final String toString()
      {
          return "TimeStampedObject [object=" + this.object + ", timestamp=" + this.timestamp + "]";
      }
  
      @Override
      public int hashCode()
      {
          final int prime = 31;
          int result = 1;
          result = prime * result + ((object == null) ? 0 : object.hashCode());
          result = prime * result + ((timestamp == null) ? 0 : timestamp.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;
          TimeStampedObject other = (TimeStampedObject) obj;
          if (object == null)
          {
              if (other.object != null)
                  return false;
          }
          else if (!object.equals(other.object))
              return false;
          if (timestamp == null)
          {
              if (other.timestamp != null)
                  return false;
          }
          else if (!timestamp.equals(other.timestamp))
              return false;
          return true;
      }
 
 }