Mercurial > pub > bltoolkit
diff Source/Mapping/DictionaryListMapper.cs @ 0:f990fcb411a9
Копия текущей версии из github
author | cin |
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date | Thu, 27 Mar 2014 21:46:09 +0400 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Source/Mapping/DictionaryListMapper.cs Thu Mar 27 21:46:09 2014 +0400 @@ -0,0 +1,92 @@ +using System; +using System.Collections; + +using BLToolkit.Common; +using BLToolkit.Reflection; + +namespace BLToolkit.Mapping +{ + public class DictionaryListMapper : IMapDataDestinationList + { + public DictionaryListMapper( + IDictionary dic, + NameOrIndexParameter keyField, + ObjectMapper objectMapper) + { + _dic = dic; + _mapper = objectMapper; + _fromSource = keyField.ByName && keyField.Name[0] == '@'; + _keyField = _fromSource? keyField.Name.Substring(1): keyField; + } + + private readonly IDictionary _dic; + private readonly bool _fromSource; + private NameOrIndexParameter _keyField; + private ObjectMapper _mapper; + private object _newObject; + private object _keyValue; + + #region IMapDataDestinationList Members + + private void AddObject() + { + if (_newObject != null) + { + if (!_fromSource) + _keyValue = _mapper.TypeAccessor[_keyField].GetValue(_newObject); + + _dic[_keyValue] = _newObject; + } + } + + public virtual void InitMapping(InitContext initContext) + { + ISupportMapping sm = _dic as ISupportMapping; + + if (sm != null) + { + sm.BeginMapping(initContext); + + if (_mapper != initContext.ObjectMapper) + _mapper = initContext.ObjectMapper; + } + } + + [CLSCompliant(false)] + public virtual IMapDataDestination GetDataDestination(InitContext initContext) + { + return _mapper; + } + + static readonly char[] _trim = { ' ' }; + + public virtual object GetNextObject(InitContext initContext) + { + AddObject(); + + if (_fromSource) + { + _keyValue = _keyField.ByName ? + initContext.DataSource.GetValue(initContext.SourceObject, _keyField.Name) : + initContext.DataSource.GetValue(initContext.SourceObject, _keyField.Index); + + if (Common.Configuration.TrimDictionaryKey && _keyValue is string) + _keyValue = _keyValue.ToString().TrimEnd(_trim); + } + + return _newObject = _mapper.CreateInstance(initContext); + } + + public virtual void EndMapping(InitContext initContext) + { + AddObject(); + + ISupportMapping sm = _dic as ISupportMapping; + + if (sm != null) + sm.EndMapping(initContext); + } + + #endregion + } +}