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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.car.vms;
     18 
     19 import android.car.annotation.FutureFeature;
     20 import android.os.Parcel;
     21 import android.os.Parcelable;
     22 
     23 import java.util.Objects;
     24 
     25 /**
     26  * A VMS Layer which can be subscribed to by VMS clients.
     27  * Consists of the layer ID and the layer version.
     28  *
     29  * @hide
     30  */
     31 @FutureFeature
     32 public final class VmsLayer implements Parcelable {
     33 
     34     // The layer ID.
     35     private int mId;
     36 
     37     // The layer version.
     38     private int mVersion;
     39 
     40     public VmsLayer(int id, int version) {
     41         mId = id;
     42         mVersion = version;
     43     }
     44 
     45     public int getId() {
     46         return mId;
     47     }
     48 
     49     public int getVersion() {
     50         return mVersion;
     51     }
     52 
     53     /**
     54      * Checks the two objects for equality by comparing their IDs and Versions.
     55      *
     56      * @param o the {@link VmsLayer} to which this one is to be checked for equality
     57      * @return true if the underlying objects of the VmsLayer are both considered equal
     58      */
     59     @Override
     60     public boolean equals(Object o) {
     61         if (!(o instanceof VmsLayer)) {
     62             return false;
     63         }
     64         VmsLayer p = (VmsLayer) o;
     65         return Objects.equals(p.mId, mId) && Objects.equals(p.mVersion, mVersion);
     66     }
     67 
     68     /**
     69      * Compute a hash code similarly tp {@link android.util.Pair}
     70      *
     71      * @return a hashcode of the Pair
     72      */
     73     @Override
     74     public int hashCode() {
     75         return Objects.hash(mId, mVersion);
     76     }
     77 
     78     @Override
     79     public String toString() {
     80         return "VmsLayer{" + mId + " " + mVersion + "}";
     81     }
     82 
     83 
     84     // Parcelable related methods.
     85     public static final Parcelable.Creator<VmsLayer> CREATOR = new
     86             Parcelable.Creator<VmsLayer>() {
     87                 public VmsLayer createFromParcel(Parcel in) {
     88                     return new VmsLayer(in);
     89                 }
     90 
     91                 public VmsLayer[] newArray(int size) {
     92                     return new VmsLayer[size];
     93                 }
     94             };
     95 
     96     @Override
     97     public void writeToParcel(Parcel out, int flags) {
     98         out.writeInt(mId);
     99         out.writeInt(mVersion);
    100     }
    101 
    102     @Override
    103     public int describeContents() {
    104         return 0;
    105     }
    106 
    107     private VmsLayer(Parcel in) {
    108         readFromParcel(in);
    109     }
    110 
    111     private void readFromParcel(Parcel in) {
    112         mId = in.readInt();
    113         mVersion = in.readInt();
    114     }
    115 }