[3742] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[17246] | 3 | * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[3742] | 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using System;
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[1567] | 23 | using System.Collections.Generic;
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| 24 | using System.Reflection;
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| 25 | using System.Text;
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[4068] | 26 | using HeuristicLab.Persistence.Auxiliary;
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| 27 | using HeuristicLab.Persistence.Core;
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[16662] | 28 | using HEAL.Attic;
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[4068] | 29 | using HeuristicLab.Persistence.Interfaces;
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[1567] | 30 |
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[1823] | 31 | namespace HeuristicLab.Persistence.Default.CompositeSerializers {
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[1567] | 32 |
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[16662] | 33 | [StorableType("44392644-F6AE-48F3-B0D8-08D3ED7DA307")]
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[3036] | 34 | internal sealed class NumberEnumerable2StringSerializer : ICompositeSerializer {
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[1567] | 35 |
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[4806] | 36 | [StorableConstructor]
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[16662] | 37 | private NumberEnumerable2StringSerializer(StorableConstructorFlag _) { }
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[4806] | 38 | public NumberEnumerable2StringSerializer() { }
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| 39 |
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[1567] | 40 | public int Priority {
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| 41 | get { return 200; }
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| 42 | }
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| 43 |
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[1823] | 44 | private static readonly Number2StringSerializer numberConverter =
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| 45 | new Number2StringSerializer();
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[1567] | 46 |
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| 47 | private static readonly Dictionary<Type, Type> interfaceCache = new Dictionary<Type, Type>();
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[6356] | 48 | private static readonly object locker = new object();
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[1567] | 49 |
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| 50 | public Type GetGenericEnumerableInterface(Type type) {
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[6356] | 51 | lock (locker) {
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| 52 | if (interfaceCache.ContainsKey(type))
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| 53 | return interfaceCache[type];
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| 54 | foreach (Type iface in type.GetInterfaces()) {
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| 55 | if (iface.IsGenericType &&
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| 56 | iface.GetGenericTypeDefinition() == typeof(IEnumerable<>) &&
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| 57 | numberConverter.CanSerialize(iface.GetGenericArguments()[0])) {
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| 58 | interfaceCache.Add(type, iface);
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| 59 | return iface;
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| 60 | }
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[1567] | 61 | }
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[6356] | 62 | interfaceCache.Add(type, null);
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[1567] | 63 | }
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| 64 | return null;
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| 65 | }
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| 66 |
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| 67 | public bool ImplementsGenericEnumerable(Type type) {
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| 68 | return GetGenericEnumerableInterface(type) != null;
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| 69 | }
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| 70 |
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| 71 | public bool HasAddMethod(Type type) {
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| 72 | return
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| 73 | type.GetMethod("Add") != null &&
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| 74 | type.GetMethod("Add").GetParameters().Length == 1 &&
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| 75 | type.GetConstructor(
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| 76 | BindingFlags.Public |
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| 77 | BindingFlags.NonPublic |
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| 78 | BindingFlags.Instance,
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| 79 | null, Type.EmptyTypes, null) != null;
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| 80 | }
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| 81 |
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[1823] | 82 | public bool CanSerialize(Type type) {
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[1567] | 83 | return
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[1705] | 84 | ReflectionTools.HasDefaultConstructor(type) &&
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[1567] | 85 | ImplementsGenericEnumerable(type) &&
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| 86 | HasAddMethod(type);
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| 87 | }
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| 88 |
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[2993] | 89 | public string JustifyRejection(Type type) {
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| 90 | if (!ReflectionTools.HasDefaultConstructor(type))
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| 91 | return "no default constructor";
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| 92 | if (!ImplementsGenericEnumerable(type))
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| 93 | return "IEnumerable<> not implemented";
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| 94 | return "no Add method with one parameter";
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| 95 | }
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| 96 |
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[1567] | 97 | public IEnumerable<Tag> CreateMetaInfo(object o) {
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| 98 | return new Tag[] { };
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| 99 | }
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| 100 |
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[3937] | 101 | private static object[] emptyArgs = new object[0];
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[1567] | 102 | public IEnumerable<Tag> Decompose(object obj) {
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| 103 | Type type = obj.GetType();
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| 104 | Type enumerable = GetGenericEnumerableInterface(type);
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| 105 | InterfaceMapping iMap = obj.GetType().GetInterfaceMap(enumerable);
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| 106 | MethodInfo getEnumeratorMethod =
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| 107 | iMap.TargetMethods[
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| 108 | Array.IndexOf(
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| 109 | iMap.InterfaceMethods,
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| 110 | enumerable.GetMethod("GetEnumerator"))];
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[3937] | 111 | object genericEnumerator = getEnumeratorMethod.Invoke(obj, emptyArgs);
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[1567] | 112 | MethodInfo moveNextMethod = genericEnumerator.GetType().GetMethod("MoveNext");
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| 113 | PropertyInfo currentProperty = genericEnumerator.GetType().GetProperty("Current");
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| 114 | StringBuilder sb = new StringBuilder();
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[3937] | 115 | while ((bool)moveNextMethod.Invoke(genericEnumerator, emptyArgs))
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[1567] | 116 | sb.Append(
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| 117 | numberConverter.Format(
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| 118 | currentProperty.GetValue(genericEnumerator, null))).Append(';');
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| 119 | yield return new Tag("compact enumerable", sb.ToString());
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| 120 | }
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| 121 |
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| 122 | public object CreateInstance(Type type, IEnumerable<Tag> metaInfo) {
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| 123 | return Activator.CreateInstance(type, true);
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| 124 | }
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| 125 |
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| 126 | public void Populate(object instance, IEnumerable<Tag> tags, Type type) {
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| 127 | Type enumerable = GetGenericEnumerableInterface(type);
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| 128 | Type elementType = enumerable.GetGenericArguments()[0];
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| 129 | MethodInfo addMethod = type.GetMethod("Add");
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[1625] | 130 | try {
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| 131 | var tagEnumerator = tags.GetEnumerator();
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| 132 | tagEnumerator.MoveNext();
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| 133 | string[] stringValues = ((string)tagEnumerator.Current.Value)
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| 134 | .Split(new[] { ';' }, StringSplitOptions.RemoveEmptyEntries);
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| 135 | foreach (var value in stringValues) {
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| 136 | addMethod.Invoke(instance, new[] { numberConverter.Parse(value, elementType) });
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| 137 | }
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[4068] | 138 | }
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| 139 | catch (InvalidOperationException e) {
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[1625] | 140 | throw new PersistenceException("Insufficient element data to reconstruct number enumerable", e);
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[4068] | 141 | }
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| 142 | catch (InvalidCastException e) {
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[1625] | 143 | throw new PersistenceException("Invalid element data during reconstruction of number enumerable", e);
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[1567] | 144 | }
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| 145 | }
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| 146 | }
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| 147 | } |
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