source: trunk/sources/HeuristicLab.Persistence/3.3/Default/Decomposers/Storable/StorableDecomposer.cs @ 1705

using System;
using System.Collections.Generic;
using System.Linq;
using HeuristicLab.Persistence.Interfaces;
using HeuristicLab.Persistence.Core;
using System.Reflection;
using HeuristicLab.Persistence.Auxiliary;

namespace HeuristicLab.Persistence.Default.Decomposers.Storable {

  [EmptyStorableClass]
  public class StorableDecomposer : IDecomposer {

    public int Priority {
      get { return 200; }
    }

    public bool CanDecompose(Type type) {
      return ReflectionTools.HasDefaultConstructor(type) &&
        (StorableAttribute.GetStorableMembers(type, false).Count() > 0 ||
          EmptyStorableClassAttribute.IsEmptyStorable(type));

    }

    public IEnumerable<Tag> CreateMetaInfo(object o) {
      return new Tag[] { };
    }

    public IEnumerable<Tag> Decompose(object obj) {
      foreach (var mapping in StorableAttribute.GetStorableAccessors(obj)) {
        yield return new Tag(mapping.Value.Name ?? mapping.Key, mapping.Value.Get());
      }
    }

    public object CreateInstance(Type type, IEnumerable<Tag> metaInfo) {
      return Activator.CreateInstance(type, true);
    }

    public void Populate(object instance, IEnumerable<Tag> objects, Type type) {
      var memberDict = new Dictionary<string, Tag>();
      IEnumerator<Tag> iter = objects.GetEnumerator();
      while (iter.MoveNext()) {
        memberDict.Add(iter.Current.Name, iter.Current);
      }
      foreach (var mapping in StorableAttribute.GetStorableAccessors(instance)) {
        string name = mapping.Value.Name ?? mapping.Key;
        if (memberDict.ContainsKey(name)) {
          mapping.Value.Set(memberDict[name].Value);
        } else if (mapping.Value.DefaultValue != null) {
          mapping.Value.Set(mapping.Value.DefaultValue);
        }
      }
    }
  }
}