1 | using System;
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2 | using System.Collections.Generic;
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3 | using System.Linq;
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4 | using System.Text;
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5 | using System.Threading.Tasks;
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6 | using HeuristicLab.Core;
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7 |
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8 | namespace HeuristicLab.Manufacture {
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9 | public static class TypeExtensions {
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10 | public static int GetInterfaceDistance(this Type type, Type interfaceType) {
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11 | if (!interfaceType.IsInterface) return -1;
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12 | int distance = int.MaxValue;
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13 | Type baseType = type;
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14 | while (baseType != typeof(object)) {
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15 | var interfaces = baseType.GetInterfaces();
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16 | var minimalInterfaces = interfaces.Except(interfaces.SelectMany(i => i.GetInterfaces()));
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17 | if (minimalInterfaces.Any(i => {
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18 | if (i.IsGenericType)
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19 | return i.GetGenericTypeDefinition() == interfaceType;
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20 | return i == interfaceType;
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21 | })) --distance;
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22 | baseType = baseType.BaseType;
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23 | }
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24 | return distance;
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25 | }
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26 |
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27 | public static bool IsEqualTo(this Type type, Type other) {
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28 | if (other == null) throw new ArgumentNullException("other");
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29 | if (type == other) return true;
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30 | if (other.IsInterface && other.IsGenericType)
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31 | return
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32 | type.IsAssignableFrom(other) ||
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33 | type.GetInterfaces()
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34 | .Where(i => i.IsGenericType)
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35 | .Any(i => i.GetGenericTypeDefinition() == other);
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36 | else if (other.IsInterface) {
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37 | return type.GetInterfaces().Any(i => i == other);
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38 | }
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39 |
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40 | else if (other.IsGenericType) {
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41 | Type baseType = type;
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42 | while (baseType != typeof(object)) {
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43 | if (baseType.IsGenericType && baseType.GetGenericTypeDefinition() == other)
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44 | return true;
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45 | baseType = baseType.BaseType;
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46 | }
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47 | }
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48 | return type.IsAssignableFrom(other);
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49 | }
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50 | }
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51 | }
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