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 17 package android.net; 18 19 import static android.os.UserHandle.PER_USER_RANGE; 20 21 import android.os.Parcel; 22 import android.os.Parcelable; 23 24 /** 25 * An inclusive range of UIDs. 26 * 27 * @hide 28 */ 29 public final class UidRange implements Parcelable { 30 public final int start; 31 public final int stop; 32 33 public UidRange(int startUid, int stopUid) { 34 if (startUid < 0) throw new IllegalArgumentException("Invalid start UID."); 35 if (stopUid < 0) throw new IllegalArgumentException("Invalid stop UID."); 36 if (startUid > stopUid) throw new IllegalArgumentException("Invalid UID range."); 37 start = startUid; 38 stop = stopUid; 39 } 40 41 public static UidRange createForUser(int userId) { 42 return new UidRange(userId * PER_USER_RANGE, (userId + 1) * PER_USER_RANGE - 1); 43 } 44 45 public int getStartUser() { 46 return start / PER_USER_RANGE; 47 } 48 49 public boolean contains(int uid) { 50 return start <= uid && uid <= stop; 51 } 52 53 /** 54 * Returns the count of UIDs in this range. 55 */ 56 public int count() { 57 return 1 + stop - start; 58 } 59 60 /** 61 * @return {@code true} if this range contains every UID contained by the {@param other} range. 62 */ 63 public boolean containsRange(UidRange other) { 64 return start <= other.start && other.stop <= stop; 65 } 66 67 @Override 68 public int hashCode() { 69 int result = 17; 70 result = 31 * result + start; 71 result = 31 * result + stop; 72 return result; 73 } 74 75 @Override 76 public boolean equals(Object o) { 77 if (this == o) { 78 return true; 79 } 80 if (o instanceof UidRange) { 81 UidRange other = (UidRange) o; 82 return start == other.start && stop == other.stop; 83 } 84 return false; 85 } 86 87 @Override 88 public String toString() { 89 return start + "-" + stop; 90 } 91 92 // implement the Parcelable interface 93 @Override 94 public int describeContents() { 95 return 0; 96 } 97 98 @Override 99 public void writeToParcel(Parcel dest, int flags) { 100 dest.writeInt(start); 101 dest.writeInt(stop); 102 } 103 104 public static final Creator<UidRange> CREATOR = 105 new Creator<UidRange>() { 106 @Override 107 public UidRange createFromParcel(Parcel in) { 108 int start = in.readInt(); 109 int stop = in.readInt(); 110 111 return new UidRange(start, stop); 112 } 113 @Override 114 public UidRange[] newArray(int size) { 115 return new UidRange[size]; 116 } 117 }; 118 } 119
