Home | History | Annotate | Download | only in radio 
      1 /**
      2  * Copyright (C) 2018 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.hardware.radio;
     18 
     19 import android.annotation.NonNull;
     20 import android.annotation.Nullable;
     21 import android.os.Parcel;
     22 import android.os.Parcelable;
     23 import android.os.RemoteException;
     24 
     25 import java.util.ArrayList;
     26 import java.util.Collection;
     27 import java.util.HashMap;
     28 import java.util.HashSet;
     29 import java.util.Map;
     30 import java.util.Objects;
     31 import java.util.Set;
     32 
     33 final class Utils {
     34     private static final String TAG = "BroadcastRadio.utils";
     35 
     36     static void writeStringMap(@NonNull Parcel dest, @Nullable Map<String, String> map) {
     37         if (map == null) {
     38             dest.writeInt(0);
     39             return;
     40         }
     41         dest.writeInt(map.size());
     42         for (Map.Entry<String, String> entry : map.entrySet()) {
     43             dest.writeString(entry.getKey());
     44             dest.writeString(entry.getValue());
     45         }
     46     }
     47 
     48     static @NonNull Map<String, String> readStringMap(@NonNull Parcel in) {
     49         int size = in.readInt();
     50         Map<String, String> map = new HashMap<>();
     51         while (size-- > 0) {
     52             String key = in.readString();
     53             String value = in.readString();
     54             map.put(key, value);
     55         }
     56         return map;
     57     }
     58 
     59     static void writeStringIntMap(@NonNull Parcel dest, @Nullable Map<String, Integer> map) {
     60         if (map == null) {
     61             dest.writeInt(0);
     62             return;
     63         }
     64         dest.writeInt(map.size());
     65         for (Map.Entry<String, Integer> entry : map.entrySet()) {
     66             dest.writeString(entry.getKey());
     67             dest.writeInt(entry.getValue());
     68         }
     69     }
     70 
     71     static @NonNull Map<String, Integer> readStringIntMap(@NonNull Parcel in) {
     72         int size = in.readInt();
     73         Map<String, Integer> map = new HashMap<>();
     74         while (size-- > 0) {
     75             String key = in.readString();
     76             int value = in.readInt();
     77             map.put(key, value);
     78         }
     79         return map;
     80     }
     81 
     82     static <T extends Parcelable> void writeSet(@NonNull Parcel dest, @Nullable Set<T> set) {
     83         if (set == null) {
     84             dest.writeInt(0);
     85             return;
     86         }
     87         dest.writeInt(set.size());
     88         set.stream().forEach(elem -> dest.writeTypedObject(elem, 0));
     89     }
     90 
     91     static <T> Set<T> createSet(@NonNull Parcel in, Parcelable.Creator<T> c) {
     92         int size = in.readInt();
     93         Set<T> set = new HashSet<>();
     94         while (size-- > 0) {
     95             set.add(in.readTypedObject(c));
     96         }
     97         return set;
     98     }
     99 
    100     static void writeIntSet(@NonNull Parcel dest, @Nullable Set<Integer> set) {
    101         if (set == null) {
    102             dest.writeInt(0);
    103             return;
    104         }
    105         dest.writeInt(set.size());
    106         set.stream().forEach(elem -> dest.writeInt(Objects.requireNonNull(elem)));
    107     }
    108 
    109     static Set<Integer> createIntSet(@NonNull Parcel in) {
    110         return createSet(in, new Parcelable.Creator<Integer>() {
    111             public Integer createFromParcel(Parcel in) {
    112                 return in.readInt();
    113             }
    114 
    115             public Integer[] newArray(int size) {
    116                 return new Integer[size];
    117             }
    118         });
    119     }
    120 
    121     static <T extends Parcelable> void writeTypedCollection(@NonNull Parcel dest,
    122             @Nullable Collection<T> coll) {
    123         ArrayList<T> list = null;
    124         if (coll != null) {
    125             if (coll instanceof ArrayList) {
    126                 list = (ArrayList) coll;
    127             } else {
    128                 list = new ArrayList<>(coll);
    129             }
    130         }
    131         dest.writeTypedList(list);
    132     }
    133 
    134     static void close(ICloseHandle handle) {
    135         try {
    136             handle.close();
    137         } catch (RemoteException ex) {
    138             ex.rethrowFromSystemServer();
    139         }
    140     }
    141 }
    142