/*
 * Copyright 1998-2015 University Corporation for Atmospheric Research/Unidata
 *
 *   Portions of this software were developed by the Unidata Program at the
 *   University Corporation for Atmospheric Research.
 *
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 *   any fee or cost, to use, copy, modify, alter, enhance and distribute
 *   this software, and any derivative works thereof, and its supporting
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 */
package ucar.coord;

import ucar.nc2.time.CalendarDate;

import java.util.HashMap;
import java.util.Map;

/**
 * A way to minimize memory by reusing immutable calendar date objects
 *
 * @author caron
 * @since 4/3/2015
 */
public class CalendarDateFactory {
  int miss = 0;
  Map<Long, CalendarDate> map;

  public CalendarDateFactory(CoordinateRuntime master) {
    map = new HashMap<>(master.getSize() * 2);
    for (Object valo : master.getValues()) {
      CalendarDate cd = CalendarDate.of((Long) valo);
      map.put(cd.getMillis(), cd);
    }
  }

  public CalendarDate get( CalendarDate cd) {
    CalendarDate cdc = map.get(cd.getMillis());
    if (cdc != null) return cdc;
    miss++;
    map.put(cd.getMillis(), cd);
    return cd;
  }
}