1 | using System;
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2 | using System.Collections.Generic;
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3 | using System.Reflection;
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4 |
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5 | namespace HeuristicLab.Persistence.Core {
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6 |
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7 |
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8 | [AttributeUsage(
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9 | AttributeTargets.Class,
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10 | AllowMultiple=false,
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11 | Inherited=false)]
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12 | public class EmptyStorableClassAttribute : Attribute {
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13 | private static readonly Dictionary<Type, bool> emptyTypeInfo = new Dictionary<Type, bool>();
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14 | public static bool IsEmpyStorable(Type type) {
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15 | if (emptyTypeInfo.ContainsKey(type))
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16 | return emptyTypeInfo[type];
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17 | foreach (var attribute in type.GetCustomAttributes(false)) {
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18 | EmptyStorableClassAttribute empty = attribute as EmptyStorableClassAttribute;
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19 | if (empty != null) {
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20 | emptyTypeInfo.Add(type, true);
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21 | return true;
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22 | }
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23 | }
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24 | int nFields = 0;
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25 | foreach ( MemberInfo memberInfo in type.GetMembers(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic) ) {
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26 | if (memberInfo.MemberType == MemberTypes.Field ||
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27 | memberInfo.MemberType == MemberTypes.Property)
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28 | nFields += 1;
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29 | }
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30 | if (nFields == 0) {
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31 | emptyTypeInfo.Add(type, true);
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32 | return true;
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33 | }
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34 | emptyTypeInfo.Add(type, false);
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35 | return false;
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36 | }
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37 | }
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38 |
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39 | [AttributeUsage(
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40 | AttributeTargets.Field | AttributeTargets.Property,
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41 | AllowMultiple=false,
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42 | Inherited=false)]
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43 | public class StorableAttribute : Attribute {
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44 |
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45 | public string Name { get; set; }
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46 | public object DefaultValue { get; set; }
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47 |
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48 | private const BindingFlags instanceMembers =
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49 | BindingFlags.Instance |
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50 | BindingFlags.Public |
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51 | BindingFlags.NonPublic |
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52 | BindingFlags.DeclaredOnly;
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53 |
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54 | public static IEnumerable<KeyValuePair<StorableAttribute, MemberInfo>> GetStorableMembers(Type type) {
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55 | return GetStorableMembers(type, true);
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56 | }
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57 |
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58 | public static IEnumerable<KeyValuePair<StorableAttribute, MemberInfo>>
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59 | GetStorableMembers(Type type, bool inherited) {
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60 | if (type.BaseType != null)
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61 | foreach ( var pair in GetStorableMembers(type.BaseType) )
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62 | yield return pair;
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63 | foreach (MemberInfo memberInfo in type.GetMembers(instanceMembers)) {
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64 | foreach (object attribute in memberInfo.GetCustomAttributes(false)) {
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65 | StorableAttribute storableAttribute =
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66 | attribute as StorableAttribute;
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67 | if (storableAttribute != null) {
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68 | yield return new KeyValuePair<StorableAttribute, MemberInfo>(storableAttribute, memberInfo);
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69 | }
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70 | }
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71 | }
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72 | }
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73 |
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74 | public static Dictionary<string, DataMemberAccessor> GetAutostorableAccessors(object obj) {
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75 | Dictionary<string, DataMemberAccessor> storableAccessors =
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76 | new Dictionary<string, DataMemberAccessor>();
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77 | foreach (KeyValuePair<StorableAttribute, MemberInfo> pair in GetStorableMembers(obj.GetType())) {
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78 | storableAccessors.Add(pair.Value.Name,
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79 | new DataMemberAccessor(pair.Value, pair.Key, obj));
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80 | }
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81 | return storableAccessors;
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82 | }
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83 | }
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84 | }
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