GeoMethods.java

/*
 * Copyright (c) 2017 OBiBa. All rights reserved.
 *
 * This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.obiba.magma.js.methods;

import java.util.ArrayList;
import java.util.Collection;

import javax.annotation.Nullable;

import org.mozilla.javascript.Context;
import org.mozilla.javascript.Function;
import org.mozilla.javascript.Scriptable;
import org.obiba.magma.Coordinate;
import org.obiba.magma.Value;
import org.obiba.magma.js.ScriptableValue;
import org.obiba.magma.type.DecimalType;
import org.obiba.magma.type.PointType;

@SuppressWarnings("StaticMethodOnlyUsedInOneClass")
public class GeoMethods {

  private GeoMethods() {

  }

  /**
   * Returns the longitude of a {@link PointType}.
   * <pre>
   *   $('Point').longitude()
   * </pre>
   */
  public static ScriptableValue longitude(Context ctx, Scriptable thisObj, @Nullable Object[] args,
      @Nullable Function funObj) {

    ScriptableValue sv = (ScriptableValue) thisObj;
    Value value = sv.getValue();
    if(value.isNull()) {
      return new ScriptableValue(thisObj, DecimalType.get().nullSequence());
    }
    if(value.isSequence()) {
      Collection<Value> values = new ArrayList<>();
      for(Value val : value.asSequence().getValue()) {
        Double longitude = ((Coordinate) val.getValue()).getLongitude();
        values.add(DecimalType.get().valueOf(longitude));
      }
      return new ScriptableValue(thisObj, DecimalType.get().sequenceOf(values));
    }
    Value newValue = PointType.get().valueOf(value.toString());
    Double longitude = ((Coordinate) newValue.getValue()).getLongitude();
    return new ScriptableValue(thisObj, DecimalType.get().valueOf(longitude));
  }

  /**
   * Returns the latitude of a {@link PointType}.
   * <pre>
   *   $('Point').latitude()
   * </pre>
   */
  public static ScriptableValue latitude(Context ctx, Scriptable thisObj, @Nullable Object[] args,
      @Nullable Function funObj) {

    ScriptableValue sv = (ScriptableValue) thisObj;
    Value value = sv.getValue();
    if(value.isNull()) {
      return new ScriptableValue(thisObj, DecimalType.get().nullSequence());
    }
    if(value.isSequence()) {
      Collection<Value> values = new ArrayList<>();
      for(Value val : value.asSequence().getValue()) {
        Double latitude = ((Coordinate) val.getValue()).getLatitude();
        values.add(DecimalType.get().valueOf(latitude));
      }
      return new ScriptableValue(thisObj, DecimalType.get().sequenceOf(values));
    }
    Value newValue = PointType.get().valueOf(value.toString());
    Double latitude = ((Coordinate) newValue.getValue()).getLatitude();
    return new ScriptableValue(thisObj, DecimalType.get().valueOf(latitude));
  }

}