[1567] | 1 | using System;
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| 2 | using HeuristicLab.Persistence.Interfaces;
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| 3 | using HeuristicLab.Persistence.Core;
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| 4 | using System.Collections.Generic;
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| 5 | using System.Reflection;
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| 6 | using System.Globalization;
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| 7 | using System.Text;
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[1623] | 8 | using HeuristicLab.Persistence.Default.Decomposers.Storable;
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[1567] | 9 |
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| 10 | namespace HeuristicLab.Persistence.Default.Decomposers {
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| 11 |
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| 12 | [EmptyStorableClass]
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| 13 | public class NumberEnumerable2StringDecomposer : IDecomposer {
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| 14 |
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| 15 | public int Priority {
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| 16 | get { return 200; }
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| 17 | }
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| 18 |
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[1644] | 19 | private static readonly Number2StringDecomposer numberConverter =
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| 20 | new Number2StringDecomposer();
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[1567] | 21 |
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| 22 | private static readonly Dictionary<Type, Type> interfaceCache = new Dictionary<Type, Type>();
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| 23 |
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| 24 | public Type GetGenericEnumerableInterface(Type type) {
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| 25 | if (interfaceCache.ContainsKey(type))
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| 26 | return interfaceCache[type];
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| 27 | foreach (Type iface in type.GetInterfaces()) {
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| 28 | if (iface.IsGenericType &&
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| 29 | iface.GetGenericTypeDefinition() == typeof(IEnumerable<>) &&
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| 30 | numberConverter.CanDecompose(iface.GetGenericArguments()[0])) {
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| 31 | interfaceCache.Add(type, iface);
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| 32 | return iface;
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| 33 | }
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| 34 | }
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| 35 | interfaceCache.Add(type, null);
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| 36 | return null;
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| 37 | }
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| 38 |
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| 39 | public bool ImplementsGenericEnumerable(Type type) {
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| 40 | return GetGenericEnumerableInterface(type) != null;
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| 41 | }
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| 42 |
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| 43 | public bool HasAddMethod(Type type) {
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| 44 | return
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| 45 | type.GetMethod("Add") != null &&
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| 46 | type.GetMethod("Add").GetParameters().Length == 1 &&
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| 47 | type.GetConstructor(
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| 48 | BindingFlags.Public |
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| 49 | BindingFlags.NonPublic |
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| 50 | BindingFlags.Instance,
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| 51 | null, Type.EmptyTypes, null) != null;
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| 52 | }
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| 53 |
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| 54 | public bool CanDecompose(Type type) {
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| 55 | return
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| 56 | ImplementsGenericEnumerable(type) &&
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| 57 | HasAddMethod(type);
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| 58 | }
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| 59 |
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| 60 | public IEnumerable<Tag> CreateMetaInfo(object o) {
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| 61 | return new Tag[] { };
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| 62 | }
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| 63 |
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| 64 | public IEnumerable<Tag> Decompose(object obj) {
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| 65 | Type type = obj.GetType();
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| 66 | Type enumerable = GetGenericEnumerableInterface(type);
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| 67 | InterfaceMapping iMap = obj.GetType().GetInterfaceMap(enumerable);
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| 68 | MethodInfo getEnumeratorMethod =
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| 69 | iMap.TargetMethods[
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| 70 | Array.IndexOf(
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| 71 | iMap.InterfaceMethods,
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| 72 | enumerable.GetMethod("GetEnumerator"))];
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| 73 | object[] empty = new object[] { };
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| 74 | object genericEnumerator = getEnumeratorMethod.Invoke(obj, empty);
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| 75 | MethodInfo moveNextMethod = genericEnumerator.GetType().GetMethod("MoveNext");
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| 76 | PropertyInfo currentProperty = genericEnumerator.GetType().GetProperty("Current");
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| 77 | StringBuilder sb = new StringBuilder();
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| 78 | while ((bool)moveNextMethod.Invoke(genericEnumerator, empty))
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| 79 | sb.Append(
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| 80 | numberConverter.Format(
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| 81 | currentProperty.GetValue(genericEnumerator, null))).Append(';');
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| 82 | yield return new Tag("compact enumerable", sb.ToString());
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| 83 | }
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| 84 |
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| 85 | public object CreateInstance(Type type, IEnumerable<Tag> metaInfo) {
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| 86 | return Activator.CreateInstance(type, true);
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| 87 | }
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| 88 |
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| 89 | public void Populate(object instance, IEnumerable<Tag> tags, Type type) {
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| 90 | Type enumerable = GetGenericEnumerableInterface(type);
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| 91 | Type elementType = enumerable.GetGenericArguments()[0];
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| 92 | MethodInfo addMethod = type.GetMethod("Add");
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[1625] | 93 | try {
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| 94 | var tagEnumerator = tags.GetEnumerator();
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| 95 | tagEnumerator.MoveNext();
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| 96 | string[] stringValues = ((string)tagEnumerator.Current.Value)
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| 97 | .Split(new[] { ';' }, StringSplitOptions.RemoveEmptyEntries);
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| 98 | foreach (var value in stringValues) {
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| 99 | addMethod.Invoke(instance, new[] { numberConverter.Parse(value, elementType) });
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| 100 | }
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| 101 | } catch (InvalidOperationException e) {
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| 102 | throw new PersistenceException("Insufficient element data to reconstruct number enumerable", e);
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| 103 | } catch (InvalidCastException e) {
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| 104 | throw new PersistenceException("Invalid element data during reconstruction of number enumerable", e);
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[1567] | 105 | }
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| 106 | }
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| 107 | }
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| 108 | } |
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