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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2498 | - | 1 | |
| 2 | namespace GMap.NET |
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| 3 | { |
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| 4 | using System; |
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| 5 | using System.Diagnostics; |
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| 6 | using System.Reflection; |
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| 7 | |||
| 8 | /// <summary> |
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| 9 | /// generic for singletons |
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| 10 | /// </summary> |
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| 11 | /// <typeparam name="T"></typeparam> |
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| 12 | public class Singleton<T> where T : new() |
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| 13 | { |
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| 14 | // ctor |
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| 15 | protected Singleton() |
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| 16 | { |
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| 17 | if(Instance != null) |
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| 18 | { |
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| 19 | throw (new Exception("You have tried to create a new singleton class where you should have instanced it. Replace your \"new class()\" with \"class.Instance\"")); |
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| 20 | } |
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| 21 | } |
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| 22 | |||
| 23 | public static T Instance |
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| 24 | { |
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| 25 | get |
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| 26 | { |
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| 27 | if(SingletonCreator.exception != null) |
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| 28 | { |
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| 29 | throw SingletonCreator.exception; |
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| 30 | } |
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| 31 | return SingletonCreator.instance; |
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| 32 | } |
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| 33 | } |
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| 34 | |||
| 35 | class SingletonCreator |
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| 36 | { |
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| 37 | static SingletonCreator() |
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| 38 | { |
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| 39 | try |
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| 40 | { |
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| 41 | instance = new T(); |
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| 42 | } |
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| 43 | catch(Exception ex) |
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| 44 | { |
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| 45 | if(ex.InnerException != null) |
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| 46 | { |
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| 47 | exception = ex.InnerException; |
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| 48 | } |
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| 49 | else |
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| 50 | { |
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| 51 | exception = ex; |
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| 52 | } |
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| 53 | Trace.WriteLine("Singleton: " + exception); |
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| 54 | } |
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| 55 | } |
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| 56 | internal static readonly T instance; |
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| 57 | internal static readonly Exception exception; |
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| 58 | } |
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| 59 | } |
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| 60 | } |