1 /*
2  * Copyright (C) 2021 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 com.google.android.tv.btservices.remote;
18 
19 public class Version implements Comparable<Version> {
20 
21     public static class OverrideVersion extends Version {
OverrideVersion(Version ver)22         public OverrideVersion(Version ver) {
23             super(ver.major(), ver.minor(), ver.vid(), ver.pid());
24         }
25     }
26 
27     public static final Version BAD_VERSION = new Version(-1, -1, (byte) 0, (byte) 0);
28 
29     protected int mMajorVersion;
30     protected int mMinorVersion;
31     protected int mVendorId;
32     protected int mProductId;
33 
Version(int majorVersion, int minorVersion, int vendorId, int productId)34     public Version(int majorVersion, int minorVersion, int vendorId, int productId) {
35         mMajorVersion = majorVersion;
36         mMinorVersion = minorVersion;
37         mVendorId = vendorId;
38         mProductId = productId;
39     }
40 
major()41     public int major() {
42         return mMajorVersion;
43     }
44 
minor()45     public int minor() {
46         return mMinorVersion;
47     }
48 
vid()49     public int vid() {
50         return mVendorId;
51     }
52 
pid()53     public int pid() {
54         return mProductId;
55     }
56 
57     @Override
equals(Object o)58     public boolean equals(Object o) {
59         if (!(o instanceof Version)) {
60             return false;
61         }
62         Version v = (Version) o;
63         if (mVendorId != v.mVendorId || mProductId != v.mProductId) {
64             return false;
65         }
66         return v.mMajorVersion == mMajorVersion && v.mMinorVersion == mMinorVersion;
67     }
68 
69     @Override
compareTo(Version version)70     public int compareTo(Version version) {
71         if (this instanceof OverrideVersion && !(version instanceof OverrideVersion)) {
72             return 1;
73         }
74         if (!(this instanceof OverrideVersion) && version instanceof OverrideVersion) {
75             return -1;
76         }
77         if (mVendorId != version.mVendorId) {
78             return mVendorId - version.mVendorId;
79         }
80         if (mProductId != version.mProductId) {
81             return mProductId - version.mProductId;
82         }
83         final int major = mMajorVersion - version.mMajorVersion;
84         if (major != 0) {
85             return major;
86         }
87         return mMinorVersion - version.mMinorVersion;
88     }
89 
toVersionString()90     public String toVersionString() {
91         String major = String.format("%01d", mMajorVersion);
92         String minor = String.format("%02d", mMinorVersion);
93         return major + "." + minor;
94     }
95 
96     @Override
toString()97     public String toString() {
98         return String.format(
99                 "%s (%02X:%02X)", toVersionString(), mVendorId, mProductId);
100     }
101 }
102