| | | 1 | | // <copyright file="DiscFileLocatorFactory.cs" company="Jérémy Ansel"> |
| | | 2 | | // Copyright (c) 2015, 2019 Jérémy Ansel |
| | | 3 | | // </copyright> |
| | | 4 | | // <license> |
| | | 5 | | // Licensed under the MIT license. See LICENSE.txt |
| | | 6 | | // </license> |
| | | 7 | | |
| | | 8 | | namespace JeremyAnsel.IO.DiscLocator |
| | | 9 | | { |
| | | 10 | | using System; |
| | | 11 | | using System.IO; |
| | | 12 | | using IO.Locator; |
| | | 13 | | |
| | | 14 | | /// <summary> |
| | | 15 | | /// A factory to create a disc file locator. |
| | | 16 | | /// </summary> |
| | | 17 | | /// <remarks> |
| | | 18 | | /// The supported formats are: Iso, Udf. |
| | | 19 | | /// </remarks> |
| | | 20 | | public static class DiscFileLocatorFactory |
| | | 21 | | { |
| | | 22 | | /// <summary> |
| | | 23 | | /// Creates a disc file locator from a file. |
| | | 24 | | /// </summary> |
| | | 25 | | /// <param name="root">The root path.</param> |
| | | 26 | | /// <returns>A file locator.</returns> |
| | | 27 | | public static IFileLocator Create(string root) |
| | | 28 | | { |
| | 0 | 29 | | if (string.IsNullOrEmpty(root)) |
| | | 30 | | { |
| | 0 | 31 | | throw new ArgumentNullException(nameof(root)); |
| | | 32 | | } |
| | | 33 | | |
| | 0 | 34 | | if (DiscFileLocatorFactory.IsDisc(root, IsoFileLocator.IsIsoFile)) |
| | | 35 | | { |
| | 0 | 36 | | return new IsoFileLocator(root); |
| | | 37 | | } |
| | | 38 | | |
| | 0 | 39 | | if (DiscFileLocatorFactory.IsDisc(root, UdfFileLocator.IsUdfFile)) |
| | | 40 | | { |
| | 0 | 41 | | return new UdfFileLocator(root); |
| | | 42 | | } |
| | | 43 | | |
| | 0 | 44 | | throw new NotSupportedException(); |
| | | 45 | | } |
| | | 46 | | |
| | | 47 | | /// <summary> |
| | | 48 | | /// Creates a disc file locator from a locator. |
| | | 49 | | /// </summary> |
| | | 50 | | /// <param name="locator">The locator.</param> |
| | | 51 | | /// <param name="root">The root path.</param> |
| | | 52 | | /// <returns>A file locator.</returns> |
| | | 53 | | public static IFileLocator Create(IFileLocator locator, string root) |
| | | 54 | | { |
| | 0 | 55 | | if (locator == null) |
| | | 56 | | { |
| | 0 | 57 | | throw new ArgumentNullException(nameof(locator)); |
| | | 58 | | } |
| | | 59 | | |
| | 0 | 60 | | if (string.IsNullOrEmpty(root)) |
| | | 61 | | { |
| | 0 | 62 | | throw new ArgumentNullException(nameof(root)); |
| | | 63 | | } |
| | | 64 | | |
| | 0 | 65 | | if (DiscFileLocatorFactory.IsDisc(locator, root, IsoFileLocator.IsIsoFile)) |
| | | 66 | | { |
| | 0 | 67 | | return new IsoFileLocator(locator, root); |
| | | 68 | | } |
| | | 69 | | |
| | 0 | 70 | | if (DiscFileLocatorFactory.IsDisc(locator, root, UdfFileLocator.IsUdfFile)) |
| | | 71 | | { |
| | 0 | 72 | | return new UdfFileLocator(locator, root); |
| | | 73 | | } |
| | | 74 | | |
| | 0 | 75 | | throw new NotSupportedException(); |
| | | 76 | | } |
| | | 77 | | |
| | | 78 | | /// <summary> |
| | | 79 | | /// Creates a disc file locator from a stream. |
| | | 80 | | /// </summary> |
| | | 81 | | /// <param name="root">The stream.</param> |
| | | 82 | | /// <returns>A file locator.</returns> |
| | | 83 | | public static IFileLocator Create(Stream root) |
| | | 84 | | { |
| | 2 | 85 | | if (root == null) |
| | | 86 | | { |
| | 0 | 87 | | throw new ArgumentNullException(nameof(root)); |
| | | 88 | | } |
| | | 89 | | |
| | 2 | 90 | | if (IsoFileLocator.IsIsoFile(root)) |
| | | 91 | | { |
| | 0 | 92 | | root.Seek(0, SeekOrigin.Begin); |
| | 0 | 93 | | return new IsoFileLocator(root); |
| | | 94 | | } |
| | | 95 | | |
| | 2 | 96 | | if (UdfFileLocator.IsUdfFile(root)) |
| | | 97 | | { |
| | 0 | 98 | | root.Seek(0, SeekOrigin.Begin); |
| | 0 | 99 | | return new UdfFileLocator(root); |
| | | 100 | | } |
| | | 101 | | |
| | 2 | 102 | | throw new NotSupportedException(); |
| | | 103 | | } |
| | | 104 | | |
| | | 105 | | /// <summary> |
| | | 106 | | /// Detects if the specified root is a disc. |
| | | 107 | | /// </summary> |
| | | 108 | | /// <param name="root">The root.</param> |
| | | 109 | | /// <param name="detect">The detection function.</param> |
| | | 110 | | /// <returns>A boolean.</returns> |
| | | 111 | | private static bool IsDisc(string root, Func<Stream, bool> detect) |
| | | 112 | | { |
| | 0 | 113 | | using (var file = File.OpenRead(root)) |
| | | 114 | | { |
| | 0 | 115 | | return detect(file); |
| | | 116 | | } |
| | 0 | 117 | | } |
| | | 118 | | |
| | | 119 | | /// <summary> |
| | | 120 | | /// Detects if the specified root from a locator is a disc. |
| | | 121 | | /// </summary> |
| | | 122 | | /// <param name="locator">The locator.</param> |
| | | 123 | | /// <param name="root">The root.</param> |
| | | 124 | | /// <param name="detect">The detection function.</param> |
| | | 125 | | /// <returns>A boolean.</returns> |
| | | 126 | | private static bool IsDisc(IFileLocator locator, string root, Func<Stream, bool> detect) |
| | | 127 | | { |
| | 0 | 128 | | using (var file = locator.Open(root)) |
| | | 129 | | { |
| | 0 | 130 | | return detect(file); |
| | | 131 | | } |
| | 0 | 132 | | } |
| | | 133 | | } |
| | | 134 | | } |
| | | 135 | | |