| 1 | // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. |
| 2 | |
| 3 | namespace WixToolset.Extensibility |
| 4 | { |
| 5 | using System; |
| 6 | using System.Collections.Generic; |
| 7 | |
| 8 | /// <summary> |
| 9 | /// Base class for extension factories. |
| 10 | /// |
| 11 | /// Implementations may request an IWixToolsetCoreServiceProvider at instantiation by having a single parameter constructor for it. |
| 12 | /// </summary> |
| 13 | public abstract class BaseExtensionFactory : IExtensionFactory |
| 14 | { |
| 15 | /// <summary> |
| 16 | /// The extension types of the WiX extension. |
| 17 | /// </summary> |
| 18 | protected abstract IReadOnlyCollection<Type> ExtensionTypes { get; } |
| 19 | |
| 20 | /// <summary> |
| 21 | /// See <see cref="IExtensionFactory.TryCreateExtension(Type, out object)"/> |
| 22 | /// </summary> |
| 23 | public virtual bool TryCreateExtension(Type extensionType, out object extension) |
| 24 | { |
| 25 | extension = null; |
| 26 | |
| 27 | foreach (var type in this.ExtensionTypes) |
| 28 | { |
| 29 | if (extensionType.IsAssignableFrom(type)) |
| 30 | { |
| 31 | extension = Activator.CreateInstance(type); |
| 32 | break; |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | return extension != null; |
| 37 | } |
| 38 | } |
| 39 | } |