|
0
|
1 using System;
|
|
|
2 using System.Collections;
|
|
|
3 using System.Collections.Generic;
|
|
|
4 using System.Linq;
|
|
|
5 using System.Linq.Expressions;
|
|
|
6 using System.Reflection;
|
|
|
7
|
|
|
8 using BLToolkit.Common;
|
|
|
9 using BLToolkit.Data.Linq;
|
|
|
10 using BLToolkit.Reflection;
|
|
|
11
|
|
|
12 using JetBrains.Annotations;
|
|
|
13
|
|
|
14 namespace BLToolkit.Mapping
|
|
|
15 {
|
|
|
16 class Mapper<TS,TD>
|
|
|
17 {
|
|
|
18 public Func<TS,MappingContext,TD> Map;
|
|
|
19 }
|
|
|
20
|
|
|
21 class MappingContext
|
|
|
22 {
|
|
|
23 public Dictionary<object,object> Objects;
|
|
|
24 public Func<object,object> GetParent;
|
|
|
25 public List<Action<object>> CrossActions;
|
|
|
26 public Dictionary<object,List<Action<object,object>>> Crosses;
|
|
|
27 }
|
|
|
28
|
|
|
29 class MappingParameters
|
|
|
30 {
|
|
|
31 public MappingSchema MappingSchema;
|
|
|
32 public bool DeepCopy = true;
|
|
|
33 public bool HandleCrossReferences = true;
|
|
|
34 public bool IncludeComplexMapping;
|
|
|
35
|
|
|
36 public Dictionary<object,object> MapperList = new Dictionary<object,object>();
|
|
|
37
|
|
|
38 public bool UseContext;
|
|
|
39 public bool ContextParameterUsed;
|
|
|
40
|
|
|
41 readonly ParameterExpression _mappingContext = Expression.Parameter(typeof(MappingContext), "ctx");
|
|
|
42 public ParameterExpression MappingContext
|
|
|
43 {
|
|
|
44 get
|
|
|
45 {
|
|
|
46 ContextParameterUsed = true;
|
|
|
47 return _mappingContext;
|
|
|
48 }
|
|
|
49 }
|
|
|
50 }
|
|
|
51
|
|
|
52 public class ExpressionMapper<TSource,TDest>
|
|
|
53 {
|
|
|
54 readonly MappingParameters _parameters;
|
|
|
55 private Func<object,object> _getCurrent;
|
|
|
56 private Action<object,object> _setCurrent;
|
|
|
57
|
|
|
58 public bool DeepCopy { get { return _parameters.DeepCopy; } set { _parameters.DeepCopy = value; } }
|
|
|
59 public bool HandleBackReferences { get { return _parameters.HandleCrossReferences; } set { _parameters.HandleCrossReferences = value; } }
|
|
|
60 public bool IncludeComplexMapping { get { return _parameters.IncludeComplexMapping; } set { _parameters.IncludeComplexMapping = value; } }
|
|
|
61
|
|
|
62 public ExpressionMapper()
|
|
|
63 : this(Map.DefaultSchema)
|
|
|
64 {
|
|
|
65 }
|
|
|
66
|
|
|
67 public ExpressionMapper(MappingSchema mappingSchema)
|
|
|
68 {
|
|
|
69 _parameters = new MappingParameters { MappingSchema = mappingSchema };
|
|
|
70 }
|
|
|
71
|
|
|
72 ExpressionMapper(MappingParameters parameters)
|
|
|
73 {
|
|
|
74 _parameters = parameters;
|
|
|
75 }
|
|
|
76
|
|
|
77 #region Value Converter
|
|
|
78
|
|
|
79 interface IValueConvertHelper
|
|
|
80 {
|
|
|
81 Expression GetConverter (Expression source);
|
|
|
82 Expression CheckNull (ExpressionMapper<TSource,TDest> mapper, Expression source, object nullValue, MapValue[] mapValues, object defaultValue, MapValue[] srcMapValues);
|
|
|
83 Expression SourceMapValues(ExpressionMapper<TSource,TDest> mapper, Expression source, object nullValue, object defaultValue, MapValue[] srcMapValues);
|
|
|
84 Expression DestMapValues (ExpressionMapper<TSource,TDest> mapper, Expression source, object nullValue, MapValue[] mapValues, object defaultValue);
|
|
|
85 }
|
|
|
86
|
|
|
87 class ValueConvertHelper<TS,TD> : IValueConvertHelper
|
|
|
88 {
|
|
|
89 public Expression GetConverter(Expression source)
|
|
|
90 {
|
|
|
91 return Expression.Invoke(Expression.Constant(Convert<TD,TS>.From), source);
|
|
|
92 }
|
|
|
93
|
|
|
94 public Expression CheckNull(
|
|
|
95 ExpressionMapper<TSource,TDest> mapper,
|
|
|
96 Expression source,
|
|
|
97 object nullValue,
|
|
|
98 MapValue[] mapValues,
|
|
|
99 object defaultValue,
|
|
|
100 MapValue[] srcMapValues)
|
|
|
101 {
|
|
|
102 var param =
|
|
|
103 source.NodeType != ExpressionType.MemberAccess &&
|
|
|
104 source.NodeType != ExpressionType.Parameter &&
|
|
|
105 source.NodeType != ExpressionType.Constant?
|
|
|
106 Expression.Parameter(typeof(TS), "p") :
|
|
|
107 null;
|
|
|
108
|
|
|
109 var nexpr = Expression.Constant(nullValue ?? default(TD));
|
|
|
110
|
|
|
111 var expr =
|
|
|
112 source.NodeType == ExpressionType.Constant && ((ConstantExpression)source).Value == null ?
|
|
|
113 nexpr as Expression:
|
|
|
114 Expression.Condition(
|
|
|
115 Expression.Equal(param ?? source, Expression.Constant(null)),
|
|
|
116 nexpr.Value == null ? Expression.Convert(nexpr, typeof(TD)) : nexpr as Expression,
|
|
|
117 mapper.GetValueMapper(param ?? source, typeof(TD), false, null, mapValues, defaultValue, srcMapValues));
|
|
|
118
|
|
|
119 return param == null ? expr : Expression.Invoke(Expression.Lambda<Func<TS,TD>>(expr, param), source);
|
|
|
120 }
|
|
|
121
|
|
|
122 public Expression SourceMapValues(
|
|
|
123 ExpressionMapper<TSource,TDest> mapper,
|
|
|
124 Expression source,
|
|
|
125 object nullValue,
|
|
|
126 object defaultValue,
|
|
|
127 MapValue[] srcMapValues)
|
|
|
128 {
|
|
|
129 var param =
|
|
|
130 //source.NodeType != ExpressionType.MemberAccess &&
|
|
|
131 source.NodeType != ExpressionType.Parameter &&
|
|
|
132 source.NodeType != ExpressionType.Constant?
|
|
|
133 Expression.Parameter(typeof(TS), "p") :
|
|
|
134 null;
|
|
|
135
|
|
|
136 var expr = mapper.GetValueMapper(Expression.Constant(defaultValue), typeof(TD), true, nullValue, null, null, null);
|
|
|
137
|
|
|
138 for (var i = srcMapValues.Length - 1; i >= 0; i--)
|
|
|
139 {
|
|
|
140 var value = srcMapValues[i];
|
|
|
141
|
|
|
142 expr = Expression.Condition(
|
|
|
143 Expression.Equal(param ?? source, mapper.GetValueMapper(Expression.Constant(value.OrigValue), typeof(TS), false, null, null, null, null)),
|
|
|
144 mapper.GetValueMapper(Expression.Constant(value.MapValues[0]), typeof(TD), true, nullValue, null, null, null),
|
|
|
145 expr);
|
|
|
146 }
|
|
|
147
|
|
|
148 return param == null ? expr : Expression.Invoke(Expression.Lambda<Func<TS,TD>>(expr, param), source);
|
|
|
149 }
|
|
|
150
|
|
|
151 public Expression DestMapValues(
|
|
|
152 ExpressionMapper<TSource,TDest> mapper,
|
|
|
153 Expression source,
|
|
|
154 object nullValue,
|
|
|
155 MapValue[] mapValues,
|
|
|
156 object defaultValue)
|
|
|
157 {
|
|
|
158 var param =
|
|
|
159 //source.NodeType != ExpressionType.MemberAccess &&
|
|
|
160 source.NodeType != ExpressionType.Parameter &&
|
|
|
161 source.NodeType != ExpressionType.Constant?
|
|
|
162 Expression.Parameter(typeof(TS), "p") :
|
|
|
163 null;
|
|
|
164
|
|
|
165 var expr = mapper.GetValueMapper(Expression.Constant(defaultValue), typeof(TD), true, nullValue, null, null, null);
|
|
|
166
|
|
|
167 for (var i = mapValues.Length - 1; i >= 0; i--)
|
|
|
168 {
|
|
|
169 var value = mapValues[i];
|
|
|
170 var orex = null as Expression;
|
|
|
171
|
|
|
172 foreach (var mapValue in value.MapValues)
|
|
|
173 {
|
|
|
174 var ex = Expression.Equal(param ?? source, mapper.GetValueMapper(Expression.Constant(mapValue), typeof (TS), false, null, null, null, null));
|
|
|
175 orex = orex == null ? ex : Expression.OrElse(orex, ex);
|
|
|
176 }
|
|
|
177
|
|
|
178 if (orex != null)
|
|
|
179 expr = Expression.Condition(
|
|
|
180 orex,
|
|
|
181 mapper.GetValueMapper(Expression.Constant(value.OrigValue), typeof(TD), true, nullValue, null, null, null),
|
|
|
182 expr);
|
|
|
183 }
|
|
|
184
|
|
|
185 return param == null ? expr : Expression.Invoke(Expression.Lambda<Func<TS,TD>>(expr, param), source);
|
|
|
186 }
|
|
|
187 }
|
|
|
188
|
|
|
189 static IValueConvertHelper GetValueHelper(Type stype, Type dtype)
|
|
|
190 {
|
|
|
191 var type = typeof(ValueConvertHelper<,>).MakeGenericType(typeof(TSource), typeof(TDest), stype, dtype);
|
|
|
192 return ((IValueConvertHelper)Activator.CreateInstance(type));
|
|
|
193 }
|
|
|
194
|
|
|
195 #endregion
|
|
|
196
|
|
|
197 #region Object Converter
|
|
|
198
|
|
|
199 interface IConvertHelper
|
|
|
200 {
|
|
|
201 Expression MapObjects(ExpressionMapper<TSource,TDest> mapper, Expression source);
|
|
|
202 Expression MapLists (ExpressionMapper<TSource,TDest> mapper, Expression source);
|
|
|
203 }
|
|
|
204
|
|
|
205 class ConvertHelper<TS,TD> : IConvertHelper
|
|
|
206 where TS : class
|
|
|
207 where TD : class
|
|
|
208 {
|
|
|
209 static TD MapCrossReferences(
|
|
|
210 MappingContext ctx,
|
|
|
211 TS source,
|
|
|
212 Func<TS,TD> func,
|
|
|
213 Func<object,object> getCurrent,
|
|
|
214 Action<object,object> setCurrent)
|
|
|
215 {
|
|
|
216 if (source == null)
|
|
|
217 return null;
|
|
|
218
|
|
|
219 object dest;
|
|
|
220 List<Action<object,object>> list;
|
|
|
221
|
|
|
222 if (ctx.Objects.TryGetValue(source, out dest))
|
|
|
223 {
|
|
|
224 if (dest == null)
|
|
|
225 {
|
|
|
226 if (ctx.Crosses == null)
|
|
|
227 ctx.Crosses = new Dictionary<object,List<Action<object,object>>>();
|
|
|
228
|
|
|
229 if (!ctx.Crosses.TryGetValue(source, out list))
|
|
|
230 ctx.Crosses[source] = list = new List<Action<object,object>>();
|
|
|
231
|
|
|
232 var getParent = ctx.GetParent;
|
|
|
233
|
|
|
234 Action<object,object> setter = (obj,value) => setCurrent(getParent(obj), value);
|
|
|
235
|
|
|
236 list.Add(setter);
|
|
|
237 }
|
|
|
238
|
|
|
239 return (TD)dest;
|
|
|
240 }
|
|
|
241
|
|
|
242 var currParent = ctx.GetParent;
|
|
|
243
|
|
|
244 ctx.GetParent = p => getCurrent(currParent(p));
|
|
|
245 ctx.Objects.Add(source, null);
|
|
|
246 ctx.Objects[source] = dest = func(source);
|
|
|
247 ctx.GetParent = currParent;
|
|
|
248
|
|
|
249 if (ctx.Crosses != null && ctx.Crosses.TryGetValue(source, out list))
|
|
|
250 {
|
|
|
251 if (ctx.CrossActions == null)
|
|
|
252 ctx.CrossActions = new List<Action<object>>();
|
|
|
253
|
|
|
254 foreach (var action in list)
|
|
|
255 {
|
|
|
256 var setValue = action;
|
|
|
257
|
|
|
258 Action<object> f = parent => setValue(parent, dest);
|
|
|
259 ctx.CrossActions.Add(f);
|
|
|
260 }
|
|
|
261
|
|
|
262 ctx.Crosses.Remove(source);
|
|
|
263 }
|
|
|
264
|
|
|
265 return (TD)dest;
|
|
|
266 }
|
|
|
267
|
|
|
268 static TD MapObjects(TS source, Func<TS,TD> func)
|
|
|
269 {
|
|
|
270 return source == null ? null : func(source);
|
|
|
271 }
|
|
|
272
|
|
|
273 public Expression MapObjects(ExpressionMapper<TSource,TDest> mapper, Expression source)
|
|
|
274 {
|
|
|
275 var param = mapper._getCurrent == null ? (ParameterExpression)source : Expression.Parameter(source.Type, "source");
|
|
|
276
|
|
|
277 Expression expr;
|
|
|
278 object m;
|
|
|
279
|
|
|
280 if (mapper._parameters.MapperList.TryGetValue(new { S = typeof(TS), D = typeof(TD) }, out m))
|
|
|
281 {
|
|
|
282 var map = (Mapper<TS,TD>)m;
|
|
|
283
|
|
|
284 if (map.Map == null)
|
|
|
285 {
|
|
|
286 expr = Expression.Invoke(
|
|
|
287 Expression.PropertyOrField(Expression.Constant(map), "Map"),
|
|
|
288 source, mapper._parameters.MappingContext);
|
|
|
289 }
|
|
|
290 else
|
|
|
291 {
|
|
|
292 expr = Expression.Invoke(Expression.Constant(map.Map), source, mapper._parameters.MappingContext);
|
|
|
293 }
|
|
|
294 }
|
|
|
295 else
|
|
|
296 {
|
|
|
297 var exmap = new ExpressionMapper<TS,TD>(mapper._parameters);
|
|
|
298 expr = exmap.GetMemberInit(param);
|
|
|
299 }
|
|
|
300
|
|
|
301 if (mapper._getCurrent == null)
|
|
|
302 return expr;
|
|
|
303
|
|
|
304 if (!mapper.HandleBackReferences)
|
|
|
305 {
|
|
|
306 Expression<Func<object>> func = () => MapObjects((TS)null, null);
|
|
|
307 return Expression.Call((MethodInfo)ReflectionHelper.MemeberInfo(func), source, Expression.Lambda<Func<TS,TD>>(expr, param));
|
|
|
308 }
|
|
|
309 else
|
|
|
310 {
|
|
|
311 mapper._parameters.UseContext = true;
|
|
|
312
|
|
|
313 Expression<Func<object>> func = () => MapCrossReferences(null, null, null, null, null);
|
|
|
314
|
|
|
315 return Expression.Call(
|
|
|
316 (MethodInfo)ReflectionHelper.MemeberInfo(func),
|
|
|
317 mapper._parameters.MappingContext,
|
|
|
318 source,
|
|
|
319 Expression.Lambda<Func<TS,TD>>(expr, param),
|
|
|
320 Expression.Constant(mapper._getCurrent),
|
|
|
321 Expression.Constant(mapper._setCurrent));
|
|
|
322 }
|
|
|
323 }
|
|
|
324
|
|
|
325 interface IItemHelper
|
|
|
326 {
|
|
|
327 Expression MapLists(ExpressionMapper<TSource,TDest> mapper, Expression source);
|
|
|
328 }
|
|
|
329
|
|
|
330 interface IClassItemHelper
|
|
|
331 {
|
|
|
332 MethodInfo GetObjectArrayInfo();
|
|
|
333 MethodInfo GetObjectListInfo(bool isList);
|
|
|
334 }
|
|
|
335
|
|
|
336 class ClassItemHelper<TSourceItem,TDestItem> : IClassItemHelper
|
|
|
337 where TSourceItem : class
|
|
|
338 where TDestItem : class
|
|
|
339 {
|
|
|
340 static TDestItem[] MapObjectArray(MappingContext ctx, IEnumerable<TSourceItem> source, Func<TSourceItem,TDestItem> itemMapper)
|
|
|
341 {
|
|
|
342 if (source == null)
|
|
|
343 return null;
|
|
|
344
|
|
|
345 if (source is ICollection)
|
|
|
346 {
|
|
|
347 var col = (ICollection)source;
|
|
|
348 var dest = new TDestItem[col.Count];
|
|
|
349 var n = 0;
|
|
|
350
|
|
|
351 foreach (var item in source)
|
|
|
352 {
|
|
|
353 var current = n;
|
|
|
354 dest[n++] = ConvertHelper<TSourceItem,TDestItem>.MapCrossReferences(
|
|
|
355 ctx, item, itemMapper,
|
|
|
356 _ => dest[current],
|
|
|
357 (_,v) => { dest[current] = (TDestItem)v; });
|
|
|
358 }
|
|
|
359
|
|
|
360 return dest;
|
|
|
361 }
|
|
|
362 else
|
|
|
363 {
|
|
|
364 TDestItem[] dest = null;
|
|
|
365
|
|
|
366 var list = new List<TDestItem>();
|
|
|
367 var n = 0;
|
|
|
368
|
|
|
369 foreach (var item in source)
|
|
|
370 {
|
|
|
371 var current = n;
|
|
|
372 list.Add(null);
|
|
|
373 list[n++] = ConvertHelper<TSourceItem,TDestItem>.MapCrossReferences(
|
|
|
374 ctx, item, itemMapper,
|
|
|
375 _ => dest == null ? list[current] : dest[current],
|
|
|
376 (_,v) => { if (dest == null) list[current] = (TDestItem)v; else dest[current] = (TDestItem)v; });
|
|
|
377 }
|
|
|
378
|
|
|
379 return dest = list.ToArray();
|
|
|
380 }
|
|
|
381 }
|
|
|
382
|
|
|
383 [UsedImplicitly]
|
|
|
384 static TList MapObjectList<TList>(MappingContext ctx, IEnumerable<TSourceItem> source, Func<TSourceItem,TDestItem> itemMapper)
|
|
|
385 where TList : class, IList<TDestItem>, new()
|
|
|
386 {
|
|
|
387 if (source == null)
|
|
|
388 return null;
|
|
|
389
|
|
|
390 var n = 0;
|
|
|
391 var dest = source is ICollection && typeof(TList) == typeof(List<TDestItem>) ?
|
|
|
392 (TList)(IList<TDestItem>)new List<TDestItem>(((ICollection)source).Count) : new TList();
|
|
|
393
|
|
|
394 foreach (var item in source)
|
|
|
395 {
|
|
|
396 var current = n;
|
|
|
397 dest.Add(null);
|
|
|
398 dest[n++] = ConvertHelper<TSourceItem,TDestItem>.MapCrossReferences(
|
|
|
399 ctx, item, itemMapper,
|
|
|
400 _ => dest[current],
|
|
|
401 (_,v) => { dest[current] = (TDestItem)v; });
|
|
|
402 }
|
|
|
403
|
|
|
404 return dest;
|
|
|
405 }
|
|
|
406
|
|
|
407 public MethodInfo GetObjectArrayInfo()
|
|
|
408 {
|
|
|
409 Expression<Func<object>> arrMapper = () => MapObjectArray(null, null, null);
|
|
|
410 return (MethodInfo)ReflectionHelper.MemeberInfo(arrMapper);
|
|
|
411 }
|
|
|
412
|
|
|
413 public MethodInfo GetObjectListInfo(bool isList)
|
|
|
414 {
|
|
|
415 var method = typeof(ClassItemHelper<TSourceItem,TDestItem>).GetMethod("MapObjectList", BindingFlags.NonPublic | BindingFlags.Static);
|
|
|
416 return method.MakeGenericMethod(isList ? typeof (List<TDestItem>) : typeof (TD));
|
|
|
417 }
|
|
|
418 }
|
|
|
419
|
|
|
420 class ItemHelper<TSourceItem,TDestItem> : IItemHelper
|
|
|
421 {
|
|
|
422 static TDestItem[] MapScalarArray(IEnumerable<TSourceItem> source, Func<TSourceItem,TDestItem> itemMapper)
|
|
|
423 {
|
|
|
424 if (source == null)
|
|
|
425 return null;
|
|
|
426
|
|
|
427 if (source is ICollection)
|
|
|
428 {
|
|
|
429 var col = (ICollection)source;
|
|
|
430 var dest = new TDestItem[col.Count];
|
|
|
431 var n = 0;
|
|
|
432
|
|
|
433 foreach (var item in source)
|
|
|
434 dest[n++] = itemMapper(item);
|
|
|
435
|
|
|
436 return dest;
|
|
|
437 }
|
|
|
438
|
|
|
439 return source.Select(itemMapper).ToArray();
|
|
|
440 }
|
|
|
441
|
|
|
442 [UsedImplicitly]
|
|
|
443 static TList MapScalarList<TList>(IEnumerable<TSourceItem> source, Func<TSourceItem,TDestItem> itemMapper)
|
|
|
444 where TList : class, IList<TDestItem>, new()
|
|
|
445 {
|
|
|
446 if (source == null)
|
|
|
447 return null;
|
|
|
448
|
|
|
449 var dest = new TList();
|
|
|
450 var list = dest as List<TDestItem>;
|
|
|
451
|
|
|
452 if (list != null)
|
|
|
453 list.AddRange(source.Select(itemMapper));
|
|
|
454 else
|
|
|
455 foreach (var item in source)
|
|
|
456 dest.Add(itemMapper(item));
|
|
|
457
|
|
|
458 return dest;
|
|
|
459 }
|
|
|
460
|
|
|
461 public Expression MapLists(ExpressionMapper<TSource,TDest> mapper, Expression source)
|
|
|
462 {
|
|
|
463 var itemMapper =
|
|
|
464 new ExpressionMapper<TSourceItem,TDestItem>(mapper._parameters);
|
|
|
465
|
|
|
466 var itemParam = Expression.Parameter(typeof(TSourceItem), "item");
|
|
|
467 var itemExpr = itemMapper.GetValueMapper(
|
|
|
468 itemParam,
|
|
|
469 typeof(TDestItem),
|
|
|
470 true,
|
|
|
471 mapper._parameters.MappingSchema.GetNullValue (typeof(TDestItem)),
|
|
|
472 mapper._parameters.MappingSchema.GetMapValues (typeof(TDestItem)),
|
|
|
473 mapper._parameters.MappingSchema.GetDefaultValue(typeof(TDestItem)),
|
|
|
474 mapper._parameters.MappingSchema.GetMapValues (typeof(TSourceItem)));
|
|
|
475
|
|
|
476 var itemLambda = Expression.Lambda<Func<TSourceItem,TDestItem>>(itemExpr, itemParam);
|
|
|
477
|
|
|
478 var isSourceScalar = !typeof(TSourceItem).IsArray && TypeHelper.IsScalar(typeof(TSourceItem));
|
|
|
479 var isDestScalar = !typeof(TDestItem). IsArray && TypeHelper.IsScalar(typeof(TDestItem));
|
|
|
480
|
|
|
481 if (!mapper.HandleBackReferences || isSourceScalar || isDestScalar)
|
|
|
482 {
|
|
|
483 if (typeof (TD).IsArray)
|
|
|
484 {
|
|
|
485 Expression<Func<object>> arrMapper = () => MapScalarArray(null, null);
|
|
|
486 return Expression.Call((MethodInfo)ReflectionHelper.MemeberInfo(arrMapper), source, itemLambda);
|
|
|
487 }
|
|
|
488
|
|
|
489 var isList =
|
|
|
490 typeof (TD) == typeof (IEnumerable<TDestItem>) || typeof (TD) == typeof (ICollection<TDestItem>) ||
|
|
|
491 typeof (TD) == typeof (IList<TDestItem>) || typeof (TD) == typeof (List<TDestItem>);
|
|
|
492
|
|
|
493 var method = typeof (ItemHelper<TSourceItem, TDestItem>).GetMethod("MapScalarList", BindingFlags.NonPublic | BindingFlags.Static);
|
|
|
494
|
|
|
495 method = method.MakeGenericMethod(isList ? typeof (List<TDestItem>) : typeof (TD));
|
|
|
496
|
|
|
497 return Expression.Call(method, source, itemLambda);
|
|
|
498 }
|
|
|
499 else
|
|
|
500 {
|
|
|
501 mapper._parameters.UseContext = true;
|
|
|
502
|
|
|
503 var type = typeof (ClassItemHelper<,>).MakeGenericType(
|
|
|
504 typeof (TSource), typeof (TDest),
|
|
|
505 typeof (TS), typeof (TD),
|
|
|
506 typeof (TSourceItem), typeof (TDestItem));
|
|
|
507
|
|
|
508 var helper = ((IClassItemHelper)Activator.CreateInstance(type));
|
|
|
509
|
|
|
510 if (typeof (TD).IsArray)
|
|
|
511 return Expression.Call(helper.GetObjectArrayInfo(), mapper._parameters.MappingContext, source, itemLambda);
|
|
|
512
|
|
|
513 var isList =
|
|
|
514 typeof (TD) == typeof (IEnumerable<TDestItem>) || typeof (TD) == typeof (ICollection<TDestItem>) ||
|
|
|
515 typeof (TD) == typeof (IList<TDestItem>) || typeof (TD) == typeof (List<TDestItem>);
|
|
|
516
|
|
|
517 return Expression.Call(helper.GetObjectListInfo(isList), mapper._parameters.MappingContext, source, itemLambda);
|
|
|
518 }
|
|
|
519 }
|
|
|
520 }
|
|
|
521
|
|
|
522 public Expression MapLists(ExpressionMapper<TSource,TDest> mapper, Expression source)
|
|
|
523 {
|
|
|
524 var ts = TypeHelper.GetGenericType(typeof(IEnumerable<>), typeof(TS)).GetGenericArguments()[0];
|
|
|
525 var td = TypeHelper.GetGenericType(typeof(IEnumerable<>), typeof(TD)).GetGenericArguments()[0];
|
|
|
526
|
|
|
527 var type = typeof(ItemHelper<,>).MakeGenericType(typeof(TSource), typeof(TDest), typeof(TS), typeof(TD), ts, td);
|
|
|
528 return ((IItemHelper)Activator.CreateInstance(type)).MapLists(mapper, source);
|
|
|
529 }
|
|
|
530 }
|
|
|
531
|
|
|
532 static IConvertHelper GetHelper(Type stype, Type dtype)
|
|
|
533 {
|
|
|
534 var type = typeof(ConvertHelper<,>).MakeGenericType(typeof(TSource), typeof(TDest), stype, dtype);
|
|
|
535 return ((IConvertHelper)Activator.CreateInstance(type));
|
|
|
536 }
|
|
|
537
|
|
|
538 #endregion
|
|
|
539
|
|
|
540 Expression GetValueMapper(
|
|
|
541 Expression source,
|
|
|
542 Type dtype,
|
|
|
543 bool checkNull,
|
|
|
544 object nullValue,
|
|
|
545 MapValue[] destMapValues,
|
|
|
546 object defaultValue,
|
|
|
547 MapValue[] srcMapValues)
|
|
|
548 {
|
|
|
549 var stype = source.Type;
|
|
|
550
|
|
|
551 var isSourceScalar = !stype.IsArray && TypeHelper.IsScalar(stype);
|
|
|
552 var isDestScalar = !dtype.IsArray && TypeHelper.IsScalar(dtype);
|
|
|
553
|
|
|
554 if (dtype == typeof(object) || dtype == stype && (!DeepCopy || isSourceScalar))
|
|
|
555 return source;
|
|
|
556
|
|
|
557 var isSourceNullable = TypeHelper.IsNullableType(stype) || stype.IsClass;
|
|
|
558
|
|
|
559 if (checkNull && isSourceNullable && !TypeHelper.IsNullableType(dtype) && (isDestScalar || isSourceScalar))
|
|
|
560 return GetValueHelper(stype, dtype).CheckNull(this, source, nullValue, destMapValues, defaultValue, srcMapValues);
|
|
|
561
|
|
|
562 if (srcMapValues != null)
|
|
|
563 return GetValueHelper(stype, dtype).SourceMapValues(this, source, nullValue, defaultValue, srcMapValues);
|
|
|
564
|
|
|
565 if (destMapValues != null)
|
|
|
566 return GetValueHelper(stype, dtype).DestMapValues(this, source, nullValue, destMapValues, defaultValue);
|
|
|
567
|
|
|
568 if (dtype == typeof (string))
|
|
|
569 return
|
|
|
570 isSourceNullable
|
|
|
571 ?
|
|
|
572 Expression.Condition(
|
|
|
573 Expression.Equal(source, Expression.Constant(null)),
|
|
|
574 Expression.Constant(null),
|
|
|
575 Expression.Call(source, "ToString", Array<Type>.Empty)) as Expression
|
|
|
576 :
|
|
|
577 Expression.Call(source, "ToString", Array<Type>.Empty);
|
|
|
578
|
|
|
579 if (!isDestScalar && !isSourceScalar)
|
|
|
580 {
|
|
|
581 if (TypeHelper.GetGenericType(typeof(IEnumerable<>), dtype) != null &&
|
|
|
582 TypeHelper.GetGenericType(typeof(IEnumerable<>), stype) != null)
|
|
|
583 return GetHelper(stype, dtype).MapLists(this, source);
|
|
|
584
|
|
|
585 return GetHelper(stype, dtype).MapObjects(this, source);
|
|
|
586 }
|
|
|
587
|
|
|
588 try
|
|
|
589 {
|
|
|
590 return Expression.Convert(source, dtype);
|
|
|
591 }
|
|
|
592 catch (InvalidOperationException)
|
|
|
593 {
|
|
|
594 }
|
|
|
595
|
|
|
596 return GetValueHelper(stype, dtype).GetConverter(source);
|
|
|
597 }
|
|
|
598
|
|
|
599 IEnumerable<MemberBinding> GetBindings(Expression source)
|
|
|
600 {
|
|
|
601 var dest = _parameters.MappingSchema.GetObjectMapper(typeof(TDest));
|
|
|
602 var src = _parameters.MappingSchema.GetObjectMapper(typeof(TSource));
|
|
|
603
|
|
|
604 foreach (MemberMapper dmm in dest)
|
|
|
605 {
|
|
|
606 if (!IncludeComplexMapping && dmm is MemberMapper.ComplexMapper)
|
|
|
607 continue;
|
|
|
608
|
|
|
609 var dma = dmm.MemberAccessor;
|
|
|
610
|
|
|
611 if (!dma.HasSetter)
|
|
|
612 continue;
|
|
|
613
|
|
|
614 var attr = dma.GetAttribute<ExpressionMapIgnoreAttribute>();
|
|
|
615
|
|
|
616 if (attr != null && attr.Ignore)
|
|
|
617 continue;
|
|
|
618
|
|
|
619 var smm = src[dmm.Name];
|
|
|
620
|
|
|
621 if (smm == null)
|
|
|
622 continue;
|
|
|
623
|
|
|
624 if (!IncludeComplexMapping && smm is MemberMapper.ComplexMapper)
|
|
|
625 continue;
|
|
|
626
|
|
|
627 var sma = smm.MemberAccessor;
|
|
|
628
|
|
|
629 if (!sma.HasGetter)
|
|
|
630 continue;
|
|
|
631
|
|
|
632 attr = sma.GetAttribute<ExpressionMapIgnoreAttribute>();
|
|
|
633
|
|
|
634 if (attr != null && attr.Ignore)
|
|
|
635 continue;
|
|
|
636
|
|
|
637 _getCurrent = dma.GetValue;
|
|
|
638 _setCurrent = dma.SetValue;
|
|
|
639
|
|
|
640 var bind = Expression.Bind(
|
|
|
641 dma.MemberInfo,
|
|
|
642 GetValueMapper(
|
|
|
643 Expression.PropertyOrField(source, sma.Name),
|
|
|
644 dma.Type,
|
|
|
645 true,
|
|
|
646 dmm.MapMemberInfo.NullValue,
|
|
|
647 dmm.MapMemberInfo.MapValues,
|
|
|
648 dmm.MapMemberInfo.DefaultValue,
|
|
|
649 smm.MapMemberInfo.MapValues));
|
|
|
650
|
|
|
651 yield return bind;
|
|
|
652 }
|
|
|
653
|
|
|
654 var destMembers = from m in ((IEnumerable<MemberAccessor>)dest.TypeAccessor) select m;
|
|
|
655
|
|
|
656 destMembers = destMembers.Except(dest.Select(mm => mm.MemberAccessor)).ToList();
|
|
|
657
|
|
|
658 var srcMembers =
|
|
|
659 (from m in ((IEnumerable<MemberAccessor>)src.TypeAccessor) select m)
|
|
|
660 .Except(src.Select(mm => mm.MemberAccessor))
|
|
|
661 .ToList();
|
|
|
662
|
|
|
663 foreach (var dma in destMembers)
|
|
|
664 {
|
|
|
665 if (!dma.HasSetter)
|
|
|
666 continue;
|
|
|
667
|
|
|
668 var sma = srcMembers.FirstOrDefault(mi => mi.Name == dma.Name);
|
|
|
669
|
|
|
670 if (sma == null || !sma.HasGetter)
|
|
|
671 continue;
|
|
|
672
|
|
|
673 _getCurrent = dma.GetValue;
|
|
|
674 _setCurrent = dma.SetValue;
|
|
|
675
|
|
|
676 var bind = Expression.Bind(
|
|
|
677 dma.MemberInfo,
|
|
|
678 GetValueMapper(
|
|
|
679 Expression.MakeMemberAccess(source, sma.MemberInfo),
|
|
|
680 dma.Type,
|
|
|
681 true,
|
|
|
682 _parameters.MappingSchema.GetNullValue (dma.Type),
|
|
|
683 _parameters.MappingSchema.GetMapValues (dma.Type),
|
|
|
684 _parameters.MappingSchema.GetDefaultValue(dma.Type),
|
|
|
685 _parameters.MappingSchema.GetMapValues (sma.Type)));
|
|
|
686
|
|
|
687 yield return bind;
|
|
|
688 }
|
|
|
689 }
|
|
|
690
|
|
|
691 Expression GetMemberInit(ParameterExpression source)
|
|
|
692 {
|
|
|
693 var mapper = new Mapper<TSource,TDest>();
|
|
|
694
|
|
|
695 _parameters.MapperList.Add(new { S = typeof(TSource), D = typeof(TDest) }, mapper);
|
|
|
696
|
|
|
697 var dest = TypeAccessor<TDest>.Instance;
|
|
|
698 var expr = Expression.MemberInit(Expression.New(dest.Type), GetBindings(source));
|
|
|
699
|
|
|
700 mapper.Map = Expression.Lambda<Func<TSource,MappingContext,TDest>>(expr, source, _parameters.MappingContext).Compile();
|
|
|
701
|
|
|
702 return expr;
|
|
|
703 }
|
|
|
704
|
|
|
705 interface IAbstractHelper
|
|
|
706 {
|
|
|
707 Func<TSource,TDest> GetMapper(MappingParameters ps);
|
|
|
708 }
|
|
|
709
|
|
|
710 class AbstractHelper<TS,TD> : IAbstractHelper
|
|
|
711 {
|
|
|
712 public Func<TSource,TDest> GetMapper(MappingParameters ps)
|
|
|
713 {
|
|
|
714 var em = new ExpressionMapper<TS,TD>(ps);
|
|
|
715 var mapper = em.GetMapper();
|
|
|
716
|
|
|
717 return source => (TDest)(object)mapper((TS)(object)source);
|
|
|
718 }
|
|
|
719 }
|
|
|
720
|
|
|
721 public Func<TSource,TDest> GetMapper()
|
|
|
722 {
|
|
|
723 if (typeof(TSource) == typeof(TDest) && !DeepCopy)
|
|
|
724 return s => (TDest)(object)s;
|
|
|
725
|
|
|
726 if (TypeHelper.IsAbstractClass(typeof(TSource)) || TypeHelper.IsAbstractClass(typeof(TDest)))
|
|
|
727 {
|
|
|
728 var st = TypeHelper.IsAbstractClass(typeof(TSource)) ? TypeAccessor<TSource>.Instance.Type : typeof(TSource);
|
|
|
729 var dt = TypeHelper.IsAbstractClass(typeof(TDest)) ? TypeAccessor<TDest>. Instance.Type : typeof(TDest);
|
|
|
730
|
|
|
731 var type = typeof(AbstractHelper<,>).MakeGenericType(typeof(TSource), typeof(TDest), st, dt);
|
|
|
732 return ((IAbstractHelper)Activator.CreateInstance(type)).GetMapper(_parameters);
|
|
|
733 }
|
|
|
734
|
|
|
735 var parm = Expression.Parameter(typeof(TSource), "src");
|
|
|
736 var expr = GetValueMapper(
|
|
|
737 parm,
|
|
|
738 typeof(TDest),
|
|
|
739 true,
|
|
|
740 _parameters.MappingSchema.GetNullValue (typeof(TDest)),
|
|
|
741 _parameters.MappingSchema.GetMapValues (typeof(TDest)),
|
|
|
742 _parameters.MappingSchema.GetDefaultValue(typeof(TDest)),
|
|
|
743 _parameters.MappingSchema.GetMapValues (typeof(TSource)));
|
|
|
744
|
|
|
745 if (_parameters.ContextParameterUsed)
|
|
|
746 {
|
|
|
747 var l = Expression.Lambda<Func<TSource,MappingContext,TDest>>(expr, parm, _parameters.MappingContext);
|
|
|
748 var f = l.Compile();
|
|
|
749
|
|
|
750 if (!_parameters.UseContext)
|
|
|
751 return s => f(s, null);
|
|
|
752
|
|
|
753 return s =>
|
|
|
754 {
|
|
|
755 var ctx = new MappingContext
|
|
|
756 {
|
|
|
757 Objects = new Dictionary<object,object>(10) { { s, null } },
|
|
|
758 GetParent = p => p,
|
|
|
759 };
|
|
|
760
|
|
|
761 var dest = f(s, ctx);
|
|
|
762
|
|
|
763 if (ctx.CrossActions != null)
|
|
|
764 foreach (var circle in ctx.CrossActions)
|
|
|
765 circle(dest);
|
|
|
766
|
|
|
767 if (ctx.Crosses != null)
|
|
|
768 {
|
|
|
769 List<Action<object,object>> list;
|
|
|
770
|
|
|
771 if (ctx.Crosses.TryGetValue(s, out list))
|
|
|
772 foreach (var action in list)
|
|
|
773 action(dest, dest);
|
|
|
774 }
|
|
|
775
|
|
|
776 return dest;
|
|
|
777 };
|
|
|
778 }
|
|
|
779
|
|
|
780 var lambda = Expression.Lambda<Func<TSource,TDest>>(expr, parm);
|
|
|
781
|
|
|
782 return lambda.Compile();
|
|
|
783 }
|
|
|
784 }
|
|
|
785 }
|
