1#region Copyright notice and license
2// Protocol Buffers - Google's data interchange format
3// Copyright 2019 Google Inc.  All rights reserved.
4// https://github.com/protocolbuffers/protobuf
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions are
8// met:
9//
10//     * Redistributions of source code must retain the above copyright
11// notice, this list of conditions and the following disclaimer.
12//     * Redistributions in binary form must reproduce the above
13// copyright notice, this list of conditions and the following disclaimer
14// in the documentation and/or other materials provided with the
15// distribution.
16//     * Neither the name of Google Inc. nor the names of its
17// contributors may be used to endorse or promote products derived from
18// this software without specific prior written permission.
19//
20// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31#endregion
32
33using Benchmarks;
34using Google.Protobuf.Reflection;
35using System;
36using System.Collections.Generic;
37using System.IO;
38using System.Linq;
39using System.Reflection;
40
41namespace Google.Protobuf.Benchmarks
42{
43    /// <summary>
44    /// The configuration for a single serialization test, loaded from a dataset.
45    /// </summary>
46    public class BenchmarkDatasetConfig
47    {
48        private static readonly Dictionary<string, MessageParser> parsersByMessageName =
49            typeof(GoogleMessageBenchmark).Assembly.GetTypes()
50                .Where(t => typeof(IMessage).IsAssignableFrom(t))
51                .ToDictionary(
52                    t => ((MessageDescriptor) t.GetProperty("Descriptor", BindingFlags.Static | BindingFlags.Public).GetValue(null)).FullName,
53                    t => ((MessageParser) t.GetProperty("Parser", BindingFlags.Static | BindingFlags.Public).GetValue(null)));
54
55        public MessageParser Parser { get; }
56        public List<byte[]> Payloads { get; }
57        public string Name { get; }
58
59        public BenchmarkDatasetConfig(string resource, string shortName = null)
60        {
61            var data = LoadData(resource);
62            var dataset = BenchmarkDataset.Parser.ParseFrom(data);
63
64            if (!parsersByMessageName.TryGetValue(dataset.MessageName, out var parser))
65            {
66                throw new ArgumentException($"No parser for message {dataset.MessageName} in this assembly");
67            }
68            Parser = parser;
69            Payloads = new List<byte[]>(dataset.Payload.Select(p => p.ToByteArray()));
70            Name = shortName ?? dataset.Name;
71        }
72
73        private static byte[] LoadData(string resource)
74        {
75            using (var stream = typeof(GoogleMessageBenchmark).Assembly.GetManifestResourceStream($"Google.Protobuf.Benchmarks.{resource}"))
76            {
77                if (stream == null)
78                {
79                    throw new ArgumentException($"Unable to load embedded resource {resource}");
80                }
81                var copy = new MemoryStream();
82                stream.CopyTo(copy);
83                return copy.ToArray();
84            }
85        }
86
87        public override string ToString() => Name;
88    }
89}
90