content: /*
   * Copyright (C) 2012 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package android.location;
  
  import android.annotation.UnsupportedAppUsage;
  import android.os.Parcel;
  import android.os.Parcelable;
  
  /**
   * Represents a geographical boundary, also known as a geofence.
   *
   * <p>Currently only circular geofences are supported and they do not support altitude changes.
   *
   * @hide
   */
  public final class Geofence implements Parcelable {
      /** @hide */
      public static final int TYPE_HORIZONTAL_CIRCLE = 1;
  
      private final int mType;
      private final double mLatitude;
      private final double mLongitude;
      private final float mRadius;
  
      /**
       * Create a circular geofence (on a flat, horizontal plane).
       *
       * @param latitude latitude in degrees, between -90 and +90 inclusive
       * @param longitude longitude in degrees, between -180 and +180 inclusive
       * @param radius radius in meters
       * @return a new geofence
       * @throws IllegalArgumentException if any parameters are out of range
       */
      public static Geofence createCircle(double latitude, double longitude, float radius) {
          return new Geofence(latitude, longitude, radius);
      }
  
      private Geofence(double latitude, double longitude, float radius) {
          checkRadius(radius);
          checkLatLong(latitude, longitude);
          mType = TYPE_HORIZONTAL_CIRCLE;
          mLatitude = latitude;
          mLongitude = longitude;
          mRadius = radius;
      }
  
      /** @hide */
      public int getType() {
          return mType;
      }
  
      /** @hide */
      public double getLatitude() {
          return mLatitude;
      }
  
      /** @hide */
      public double getLongitude() {
          return mLongitude;
      }
  
      /** @hide */
      public float getRadius() {
          return mRadius;
      }
  
      private static void checkRadius(float radius) {
          if (radius <= 0) {
              throw new IllegalArgumentException("invalid radius: " + radius);
          }
      }
  
      private static void checkLatLong(double latitude, double longitude) {
          if (latitude > 90.0 || latitude < -90.0) {
              throw new IllegalArgumentException("invalid latitude: " + latitude);
          }
          if (longitude > 180.0 || longitude < -180.0) {
              throw new IllegalArgumentException("invalid longitude: " + longitude);
          }
      }
  
      private static void checkType(int type) {
          if (type != TYPE_HORIZONTAL_CIRCLE) {
              throw new IllegalArgumentException("invalid type: " + type);
          }
      }
  
      @UnsupportedAppUsage
      public static final @android.annotation.NonNull Parcelable.Creator<Geofence> CREATOR = new Parcelable.Creator<Geofence>() {
          @Override
          public Geofence createFromParcel(Parcel in) {
              int type = in.readInt();
              double latitude = in.readDouble();
              double longitude = in.readDouble();
              float radius = in.readFloat();
              checkType(type);
              return Geofence.createCircle(latitude, longitude, radius);
          }
          @Override
          public Geofence[] newArray(int size) {
              return new Geofence[size];
          }
      };
  
      @Override
      public int describeContents() {
          return 0;
      }
  
      @Override
      public void writeToParcel(Parcel parcel, int flags) {
          parcel.writeInt(mType);
          parcel.writeDouble(mLatitude);
          parcel.writeDouble(mLongitude);
          parcel.writeFloat(mRadius);
      }
  
      private static String typeToString(int type) {
          switch (type) {
              case TYPE_HORIZONTAL_CIRCLE:
                  return "CIRCLE";
              default:
                  checkType(type);
                  return null;
          }
      }
  
      @Override
      public String toString() {
          return String.format("Geofence[%s %.6f, %.6f %.0fm]",
                  typeToString(mType), mLatitude, mLongitude, mRadius);
      }
  
      @Override
      public int hashCode() {
          final int prime = 31;
          int result = 1;
          long temp;
          temp = Double.doubleToLongBits(mLatitude);
          result = prime * result + (int) (temp ^ (temp >>> 32));
          temp = Double.doubleToLongBits(mLongitude);
          result = prime * result + (int) (temp ^ (temp >>> 32));
          result = prime * result + Float.floatToIntBits(mRadius);
          result = prime * result + mType;
          return result;
      }
  
      /**
       * Two geofences are equal if they have identical properties.
       */
      @Override
      public boolean equals(Object obj) {
          if (this == obj)
              return true;
          if (obj == null)
              return false;
          if (!(obj instanceof Geofence))
              return false;
          Geofence other = (Geofence) obj;
          if (mRadius != other.mRadius)
              return false;
          if (mLatitude != other.mLatitude)
              return false;
          if (mLongitude != other.mLongitude)
              return false;
          if (mType != other.mType)
              return false;
          return true;
      }
  }
  