package com.aragost.javahg;

 import java.util.Date;

 import java.util.TimeZone;

 /**

  * Represents a timestamp and a timezone offset

  */

 public class DateTime {

     /**

      * Timestamp in milliseconds since 1970

      */

     private long timestamp;

     /**

      * Timezone offset in milliseconds

      */

     private int tzOffset;

     /**

      * Construct a new DateTime with the specified timestamp and timezone

      * 

      * @param timestamp

      * @param tzOffset

      */

     public DateTime(long timestamp, int tzOffset) {

         this.timestamp = timestamp;

         this.tzOffset = tzOffset;

     }

     /**

      * Construct a new DateTime with the specified date and timezone

      * 

      * @param date

      * @param tz

      */

     public DateTime(Date date, TimeZone tz) {

         this.timestamp = date.getTime();

         this.tzOffset = tz.getOffset(this.timestamp);

     }

     /**

      * @deprecated Use constructor with tz argument

      * @param date

      */

     @Deprecated

     public DateTime(Date date) {

         this(date, TimeZone.getDefault());

     }

     /**

      * Create a new instance by parsing the given String.

      * <p>

      * The string should be in standard Mercurial format, i.e.

      * '<seconds since 1970> <timezone offset in seconds>'

      * 

      * @param string

      * @return

      */

     public static DateTime parse(String string) {

         String[] parts = string.split(" ");

         if (parts.length != 2) {

             throw new IllegalArgumentException("Wrong date format: " + string);

         }

         long millis = 1000L * Long.valueOf(parts[0]);

         int timezoneOffset = 1000 * Integer.valueOf(parts[1]);

         return new DateTime(millis, timezoneOffset);

     }

     /**

      * 

      * @return the timestamp as a java.util.Date object

      */

     public Date getDate() {

         return new Date(this.timestamp);

     }

     /**

      * 

      * @return the time/zone formatted for Mercurial

      */

     public String getHgString() {

         return "" + (this.timestamp / 1000) + " " + this.tzOffset / 1000;

     }

     @Override

     public String toString() {

         return getHgString();

     }

     @Override

     public int hashCode() {

         final int prime = 31;

         int result = 1;

         result = prime * result + (int) (timestamp ^ (timestamp >>> 32));

         result = prime * result + tzOffset;

         return result;

     }

     @Override

     public boolean equals(Object obj) {

         if (this == obj)

             return true;

         if (obj == null)

             return false;

         if (getClass() != obj.getClass())

             return false;

         DateTime other = (DateTime) obj;

         if (timestamp != other.timestamp)

             return false;

         if (tzOffset != other.tzOffset)

             return false;

         return true;

     }

 }