1/*
2 * Copyright (C) 2014 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
17package android.net;
18
19import static android.os.UserHandle.PER_USER_RANGE;
20
21import android.os.Parcel;
22import android.os.Parcelable;
23
24import java.lang.IllegalArgumentException;
25
26/**
27 * An inclusive range of UIDs.
28 *
29 * @hide
30 */
31public final class UidRange implements Parcelable {
32    public final int start;
33    public final int stop;
34
35    public UidRange(int startUid, int stopUid) {
36        if (startUid < 0) throw new IllegalArgumentException("Invalid start UID.");
37        if (stopUid < 0) throw new IllegalArgumentException("Invalid stop UID.");
38        if (startUid > stopUid) throw new IllegalArgumentException("Invalid UID range.");
39        start = startUid;
40        stop  = stopUid;
41    }
42
43    public static UidRange createForUser(int userId) {
44        return new UidRange(userId * PER_USER_RANGE, (userId + 1) * PER_USER_RANGE - 1);
45    }
46
47    public int getStartUser() {
48        return start / PER_USER_RANGE;
49    }
50
51    @Override
52    public int hashCode() {
53        int result = 17;
54        result = 31 * result + start;
55        result = 31 * result + stop;
56        return result;
57    }
58
59    @Override
60    public boolean equals(Object o) {
61        if (this == o) {
62            return true;
63        }
64        if (o instanceof UidRange) {
65            UidRange other = (UidRange) o;
66            return start == other.start && stop == other.stop;
67        }
68        return false;
69    }
70
71    @Override
72    public String toString() {
73        return start + "-" + stop;
74    }
75
76    // implement the Parcelable interface
77    @Override
78    public int describeContents() {
79        return 0;
80    }
81
82    @Override
83    public void writeToParcel(Parcel dest, int flags) {
84        dest.writeInt(start);
85        dest.writeInt(stop);
86    }
87
88    public static final Creator<UidRange> CREATOR =
89        new Creator<UidRange>() {
90            @Override
91            public UidRange createFromParcel(Parcel in) {
92                int start = in.readInt();
93                int stop = in.readInt();
94
95                return new UidRange(start, stop);
96            }
97            @Override
98            public UidRange[] newArray(int size) {
99                return new UidRange[size];
100            }
101    };
102}
103