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/*
* 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.os.Parcel;
import android.os.Parcelable;
/**
* Represents a Geofence
*/
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 horizontal, circular geofence.
* @param latitude latitude in degrees
* @param longitude longitude in degrees
* @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);
}
}
public static final 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;
}
@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;
}
}
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