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1 using System;
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2
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3 namespace BLToolkit.Patterns
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4 {
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5 [AttributeUsage(AttributeTargets.Interface | AttributeTargets.Method | AttributeTargets.Property)]
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6 public sealed class MustImplementAttribute : Attribute
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7 {
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8 public MustImplementAttribute(bool implement, bool throwException, string exceptionMessage)
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9 {
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10 _implement = implement;
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11 _throwException = throwException;
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12 _exceptionMessage = exceptionMessage;
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13 }
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14
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15 public MustImplementAttribute(bool implement, bool throwException)
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16 : this(implement, throwException, null)
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17 {
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18 }
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19
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20 public MustImplementAttribute(bool implement, string exceptionMessage)
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21 : this(implement, true, exceptionMessage)
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22 {
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23 }
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24
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25 public MustImplementAttribute(bool implement)
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26 : this(implement, true, null)
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27 {
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28 }
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29
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30 public MustImplementAttribute()
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31 : this(true, true, null)
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32 {
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33 }
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34
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35 private readonly bool _implement;
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36 public bool Implement
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37 {
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38 get { return _implement; }
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39 }
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40
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41 private bool _throwException;
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42 public bool ThrowException
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43 {
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44 get { return _throwException; }
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45 set { _throwException = value; }
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46 }
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47
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48 private string _exceptionMessage;
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49 public string ExceptionMessage
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50 {
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51 get { return _exceptionMessage; }
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52 set { _exceptionMessage = value; }
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53 }
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54
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55 /// <summary>
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56 /// All methods are optional and throws <see cref="NotImplementedException"/> at run tune.
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57 /// </summary>
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58 public static readonly MustImplementAttribute Default = new MustImplementAttribute(false, true, null);
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59
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60 /// <summary>
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61 /// All methods are optional and does nothing at run tune.
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62 /// Return value and all output parameters will be set to appropriate default values.
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63 /// </summary>
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64 public static readonly MustImplementAttribute Aggregate = new MustImplementAttribute(false, false, null);
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65 }
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66 }
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