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Utilities for Tokyo Datum, WGS84 and Japan Plane Rectangular
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package org.nkjmlab.gis.datum;

import org.nkjmlab.gis.datum.LatLon.Detum;
import org.nkjmlab.gis.datum.LatLon.Unit;
import org.nkjmlab.gis.datum.jprect.BasisWithZone;
import org.nkjmlab.gis.datum.jprect.LatLonWithZone;

public class BasisConverter {

  /**
   * 指定された単位・測地系の緯度・経度から，指定した単位・測地系の緯度を取り出す．
   *
   * @param lat 緯度
   * @param lon 経度
   * @param fromUnit 入力の単位
   * @param fromDetum 入力の単位
   * @param toUnit 出力の単位
   * @param toDetum 出力の測地系
   * @return toUnit，toDetumで指定された単位・測地系による経度
   */
  public static double changeBasisOfLat(double lat, double lon, Unit fromUnit, Detum fromDetum,
      Unit toUnit, Detum toDetum) {
    if (fromDetum == toDetum) {
      return LatLonUnitConverter.change(lat, fromUnit, toUnit);
    }
    double valOnToDetum = DatumConverter.changeDetumOfLat(lat, lon, fromUnit, fromDetum, toDetum);
    return LatLonUnitConverter.change(valOnToDetum, fromUnit, toUnit);
  }

  public static double changeBasisOfLat(double lat, double lon, Basis fromBasis, Basis toBasis) {
    return changeBasisOfLat(lat, lon, fromBasis.getUnit(), fromBasis.getDetum(), toBasis.getUnit(),
        toBasis.getDetum());
  }

  /**
   * 指定された単位・測地系の緯度・経度から，指定した単位・測地系の緯度を取り出す．
   *
   * @param lat 緯度
   * @param lon 経度
   * @param fromUnit 入力の単位
   * @param fromDetum 入力の単位
   * @param toUnit 出力の単位
   * @param toDetum 出力の測地系
   * @return toUnit，toDetumで指定された単位・測地系による経度
   */
  public static double changeBasisOfLon(double lat, double lon, Unit fromUnit, Detum fromDetum,
      Unit toUnit, Detum toDetum) {
    if (fromDetum == toDetum) {
      return LatLonUnitConverter.change(lon, fromUnit, toUnit);
    }
    double valOnToDetum = DatumConverter.changeDetumOfLon(lat, lon, fromUnit, fromDetum, toDetum);
    return LatLonUnitConverter.change(valOnToDetum, fromUnit, toUnit);
  }

  public static double changeBasisOfLon(double lat, double lon, Basis fromBasis, Basis toBasis) {
    return changeBasisOfLon(lat, lon, fromBasis.getUnit(), fromBasis.getDetum(), toBasis.getUnit(),
        toBasis.getDetum());
  }

  public static LatLonWithZone changeBasis(LatLonWithZone latLon, BasisWithZone toBasis) {
    return changeBasis(latLon.getLat(), latLon.getLon(), latLon.getBasis(), toBasis);
  }

  public static LatLon changeBasis(double lat, double lon, Basis fromBasis, Basis toBasis) {
    return new LatLon(changeBasisOfLat(lat, lon, fromBasis, toBasis),
        changeBasisOfLon(lat, lon, fromBasis, toBasis), toBasis);
  }

  public static LatLonWithZone changeBasis(double lat, double lon, BasisWithZone fromBasis,
      BasisWithZone toBasis) {
    return new LatLonWithZone(changeBasisOfLat(lat, lon, fromBasis, toBasis),
        changeBasisOfLon(lat, lon, fromBasis, toBasis), toBasis);
  }

}