1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2012 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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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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23 | using System.Reflection;
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24 | using HeuristicLab.Persistence.Data;
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25 |
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26 | namespace HeuristicLab.Persistence {
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27 | [Transformer("A2A2F675-012B-4D50-93A5-B8E728D9809C", 999)]
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28 | internal sealed class EmptyTypeTransformer : TransformerBase {
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29 | public override bool CanTransformType(Type type) {
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30 | while (type != null) {
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31 | if (type.IsArray) return false; // arrays are no empty types but contain no fields
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32 | var fields = type.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.DeclaredOnly);
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33 | if (fields.Length != 0) return false;
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34 | type = type.BaseType;
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35 | }
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36 | return true;
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37 | }
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38 | public override PersistenceData ToData(object o, PersistenceMapper mapper) {
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39 | var type = o.GetType();
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40 | var data = new ValueData<ushort>(Id);
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41 | mapper.Cache(o, data);
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42 | data.Value = mapper.GetTypeId(type);
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43 | return data;
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44 | }
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45 |
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46 | public override object ToObject(PersistenceData data, PersistenceMapper mapper) {
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47 | var primitive = (ValueData<ushort>)data;
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48 | var o = Activator.CreateInstance(mapper.GetType(primitive.Value));
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49 | mapper.Cache(data, o);
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50 | return o;
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51 | }
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52 | }
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53 | }
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