/// <summary>
/// 获取指定成员的 <see cref="ColumnAttribute"/>
/// </summary>
public virtual ColumnAttribute GetColumnAttribute(MemberInfo member, Type runtimeType)
{
Type dataType = TypeUtils.GetDataType(member);
if (dataType == null)
{
return(null);
}
ColumnAttribute column = null;
Type type = runtimeType != null ? runtimeType : (member.ReflectedType != null ? member.ReflectedType : member.DeclaringType);
if (type != null && !TypeUtils.IsAnonymousType(type))
{
TypeRuntimeInfo typeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(type);
var invoker = typeRuntime.GetInvoker(member.Name);
if (invoker != null)
{
column = invoker.Column;
}
}
return(column);
}
//static ConstructorInfo _ctorXmlReader = typeof(XmlTextReader).GetConstructor(new[] { typeof(string), typeof(XmlNodeType), typeof(XmlParserContext) });
//static ConstructorInfo _ctorSqlXml = typeof(System.Data.SqlTypes.SqlXml).GetConstructor(new[] { typeof(System.Xml.XmlTextReader) });
internal static Func <IDataRecord, object> GetTypeDeserializer(Type type, IDataRecord reader, IDictionary <string, Column> columns = null, int start = 0, int?end = null)
{
//// specify a new assembly name
//var assemblyName = new AssemblyName("Kitty");
//// create assembly builder
//var assemblyBuilder = AppDomain.CurrentDomain
// .DefineDynamicAssembly(assemblyName,
// AssemblyBuilderAccess.RunAndSave);
//// create module builder
//var moduleBuilder =
// assemblyBuilder.DefineDynamicModule(
// "KittyModule", "Kitty.exe");
//// create type builder for a class
//var typeBuilder =
// moduleBuilder.DefineType(
// "HelloKittyClass", TypeAttributes.Public);
//// create method builder
//var methodBuilder = typeBuilder.DefineMethod(
// "SayHelloMethod",
// MethodAttributes.Public | MethodAttributes.Static,
// typeof(object),
// new Type[] { typeof(IDataRecord) });
TypeRuntimeInfo typeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(type);
DynamicMethod method = new DynamicMethod(string.Format("Deserialize{0}", Guid.NewGuid()), typeof(object), new Type[] { typeof(IDataRecord) }, true);
//ILGenerator il = methodBuilder.GetILGenerator();
ILGenerator il = method.GetILGenerator();
il.DeclareLocal(typeof(int));
il.DeclareLocal(type);
il.DeclareLocal(typeof(object));
il.Emit(OpCodes.Ldc_I4_0);
il.Emit(OpCodes.Stloc_0);
il.Emit(OpCodes.Ldnull);
il.Emit(OpCodes.Stloc_2);
// 有参构造函数
ConstructorInfo specializedConstructor = null;
if (type.IsValueType)
{
// 如果是值类型，则将值类型设置为空或者0
il.Emit(OpCodes.Ldloca_S, (byte)1);
il.Emit(OpCodes.Initobj, type);
}
else
{
var ctor = typeRuntime.ConstructInvoker.Constructor;
if (ctor.GetParameters().Length > 0)
{
specializedConstructor = ctor;
}
else
{
// 如果不是匿名类或者只有无参构造函数，则new一个对象
il.Emit(OpCodes.Newobj, ctor);
il.Emit(OpCodes.Stloc_1);
}
}
// try #####
il.BeginExceptionBlock();
if (specializedConstructor == null)
{
il.Emit(OpCodes.Ldloc_1); // [target]
}
// stack is now [target]
Label finishLabel = il.DefineLabel();
Label loadNullLabel = il.DefineLabel();
int enumDeclareLocal = -1;
if (end == null)
{
end = reader.FieldCount;
}
for (int index = start; index < end; index++)
{
// 找出对应DataReader中的字段名
string memberName = reader.GetName(index);
if (columns != null)
{
Column column = null;
columns.TryGetValue(memberName, out column);
memberName = column != null ? column.Name : string.Empty;
}
// 本地变量赋值
il.Emit(OpCodes.Ldc_I4, index); // [target][index]
il.Emit(OpCodes.Stloc_0); // [target]
//il.Emit(OpCodes.Ldnull); // [target][null]
//il.Emit(OpCodes.Stloc_2); // [target]
// 如果导航属性分割列=DbNull，那么此导航属性赋空值
if (memberName == Constant.NAVIGATIONSPLITONNAME)
{
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldc_I4, index);
il.Emit(OpCodes.Callvirt, _isDBNull);
il.Emit(OpCodes.Brtrue_S, loadNullLabel);
}
var invoker = typeRuntime.GetInvoker(memberName);
if (invoker == null)
{
continue;
}
if (specializedConstructor == null)
{
il.Emit(OpCodes.Dup); // stack is now [target][target]
}
Type columnType = reader.GetFieldType(index);
Type memberType = invoker.DataType;
Label isDbNullLabel = il.DefineLabel();
Label nextLoopLabel = il.DefineLabel();
MethodInfo readMethod = GetReaderMethod(columnType);
// 判断字段是否是 DbNull
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldc_I4, index);
il.Emit(OpCodes.Callvirt, _isDBNull);
il.Emit(OpCodes.Brtrue, isDbNullLabel);
// =>DataReader.Getxx(index)
il.Emit(OpCodes.Ldarg_0); // stack is now [target][target][reader]
il.Emit(OpCodes.Ldc_I4, index); // stack is now [target][target][reader][index]
il.Emit(OpCodes.Callvirt, readMethod); // stack is now [target][target][value-or-object]
//// =>object = value，记录当前处理的值
//// 除了string类型之外，其它的都需要要装箱，这里会有性能损失，100w笔记录大概会损失0.8s~
//bool useBoxed = readMethod != _getValue && columnType != typeof(string);
//il.Emit(OpCodes.Dup); // stack is now [target][target][value-or-object][value-or-object]
//if (useBoxed) il.Emit(OpCodes.Box, columnType); // stack is now [target][target][value-or-object][value-as-object]
//else il.Emit(OpCodes.Castclass, typeof(object)); // stack is now [target][target][value][value-as-object]
//il.Emit(OpCodes.Stloc_2); // stack is now [target][target][value-or-object]
if (memberType == typeof(char) || memberType == typeof(char?))
{
il.EmitCall(OpCodes.Call, memberType == typeof(char) ? _readChar : _readNullChar, null); // stack is now [target][target][typed-value]
}
else
{
// unbox nullable enums as the primitive, i.e. byte etc
var nullUnderlyingType = Nullable.GetUnderlyingType(memberType);
var unboxType = nullUnderlyingType != null && nullUnderlyingType.IsEnum ? nullUnderlyingType : memberType;
if (unboxType.IsEnum)
{
Type numericType = Enum.GetUnderlyingType(unboxType);
if (columnType != typeof(string))
{
BoxConvert(il, columnType, unboxType, numericType);
}
else
{
if (enumDeclareLocal == -1)
{
enumDeclareLocal = il.DeclareLocal(typeof(string)).LocalIndex;
}
il.Emit(OpCodes.Castclass, typeof(string)); // stack is now [target][target][string]
il.StoreLocal(enumDeclareLocal); // stack is now [target][target]
il.Emit(OpCodes.Ldtoken, unboxType); // stack is now [target][target][enum-type-token]
il.EmitCall(OpCodes.Call, _typeFromHandle, null); // stack is now [target][target][enum-type]
il.LoadLocal(enumDeclareLocal); // stack is now [target][target][enum-type][string]
il.Emit(OpCodes.Ldc_I4_1); // stack is now [target][target][enum-type][string][true]
il.EmitCall(OpCodes.Call, _enumParse, null); // stack is now [target][target][enum-as-object]
il.Emit(OpCodes.Unbox_Any, unboxType); // stack is now [target][target][typed-value]
}
if (nullUnderlyingType != null)
{
var ctor = memberType.GetConstructor(new[] { nullUnderlyingType });
il.Emit(OpCodes.Newobj, ctor); // stack is now [target][target][typed-value]
}
}
else if (memberType.FullName == _linqBinaryName)
{
var ctor = memberType.GetConstructor(new Type[] { typeof(byte[]) });
il.Emit(OpCodes.Unbox_Any, typeof(byte[])); // stack is now [target][target][byte-array]
il.Emit(OpCodes.Newobj, ctor); // stack is now [target][target][binary]
}
else
{
TypeCode dataTypeCode = Type.GetTypeCode(columnType), unboxTypeCode = Type.GetTypeCode(unboxType);
bool useOriginal = columnType == unboxType || dataTypeCode == unboxTypeCode || dataTypeCode == Type.GetTypeCode(nullUnderlyingType);
// fix issue# oracle guid
useOriginal = useOriginal && !((nullUnderlyingType ?? unboxType) == typeof(Guid) && columnType == typeof(byte[]));
if (useOriginal)
{
if (readMethod == _getValue && unboxType != typeof(object))
{
il.EmitCast(nullUnderlyingType ?? unboxType); // stack is now [target][target][typed-value]
}
}
else
{
if (readMethod == _getValue && columnType.IsValueType)// stack is now [target][target][value]
{
il.Emit(OpCodes.Unbox_Any, columnType);
}
// not a direct match; need to tweak the unbox
BoxConvert(il, columnType, nullUnderlyingType ?? unboxType, null);
}
if (nullUnderlyingType != null)
{
var ctor = unboxType.GetConstructor(new[] { nullUnderlyingType });
il.Emit(OpCodes.Newobj, ctor); // stack is now [target][target][typed-value]
}
}
}
if (specializedConstructor == null)
{
// Store the value in the property/field
if (invoker.MemberType == MemberTypes.Field)
{
il.Emit(OpCodes.Stfld, invoker.Member as FieldInfo); // stack is now [target]
}
else
{
MethodInfo setMethod = (invoker as PropertyInvoker).SetMethod;
il.Emit(type.IsValueType ? OpCodes.Call : OpCodes.Callvirt, setMethod);// stack is now [target]
}
}
il.Emit(OpCodes.Br_S, nextLoopLabel); // stack is now [target]
il.MarkLabel(isDbNullLabel); // incoming stack: [target][target]
if (specializedConstructor == null)
{
il.Emit(OpCodes.Pop); // stack is now [target]
}
else
{
// DbNull，将NULL或者0推到栈顶
if (!invoker.DataType.IsValueType)
{
il.Emit(OpCodes.Ldnull);
}
else
{
int localIndex = il.DeclareLocal(invoker.DataType).LocalIndex;
il.LoadLocalAddress(localIndex);
il.Emit(OpCodes.Initobj, invoker.DataType);
il.LoadLocal(localIndex);
}
}
il.MarkLabel(nextLoopLabel);
}
if (specializedConstructor != null)
{
il.Emit(OpCodes.Newobj, specializedConstructor);
}
il.Emit(OpCodes.Stloc_1); // stack is empty
// 直接跳到结束标签返回实体
il.Emit(OpCodes.Br, finishLabel);
// 将 null 赋值给实体
il.MarkLabel(loadNullLabel);
il.Emit(OpCodes.Pop);
il.Emit(OpCodes.Ldnull);
il.Emit(OpCodes.Stloc_1);
il.MarkLabel(finishLabel);
il.BeginCatchBlock(typeof(Exception)); // stack is Exception
il.Emit(OpCodes.Ldloc_0); // stack is Exception, index
il.Emit(OpCodes.Ldloc_2); // stack is Exception, index, value
il.Emit(OpCodes.Ldarg_0); // stack is Exception, index, reader
il.EmitCall(OpCodes.Call, _throwException, null);
il.EndExceptionBlock();
il.Emit(OpCodes.Ldloc_1); // stack is [rval]
il.Emit(OpCodes.Ret);
//// then create the whole class type
//var helloKittyClassType = typeBuilder.CreateType();
//// set entry point for this assembly
//assemblyBuilder.SetEntryPoint(
// helloKittyClassType.GetMethod("SayHelloMethod"));
//// save assembly
//assemblyBuilder.Save("Kitty.exe");
return((Func <IDataRecord, object>)method.CreateDelegate(typeof(Func <IDataRecord, object>)));
}
// 反序列化导航属性
// @prevLine 前一行数据
// @isLine 是否同一行数据<同一父级>
void Deserialize_Navigation(object prevModel, object model, string typeName, bool isThisLine)
{
// CRM_SaleOrder.Client
// CRM_SaleOrder.Client.AccountList
Type type = model.GetType();
TypeRuntimeInfo typeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(type);
if (string.IsNullOrEmpty(typeName))
{
typeName = type.Name;
}
foreach (var kvp in _definition.Navigations)
{
int start = -1;
int end = -1;
var descriptor = kvp.Value;
if (descriptor.FieldCount > 0)
{
start = descriptor.Start;
end = descriptor.Start + descriptor.FieldCount;
}
string keyName = typeName + "." + descriptor.Name;
if (keyName != kvp.Key)
{
continue;
}
var navInvoker = typeRuntime.GetInvoker(descriptor.Name);
if (navInvoker == null)
{
continue;
}
Type navType = navInvoker.DataType;
Func <IDataRecord, object> deserializer = null;
TypeRuntimeInfo navTypeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(navType);
object navCollection = null;
//if (navType.IsGenericType && navTypeRuntime.GenericTypeDefinition == typeof(List<>))
if (TypeUtils.IsCollectionType(navType))
{
// 1：n关系，导航属性为 List<T>
navCollection = navInvoker.Invoke(model);
if (navCollection == null)
{
// new 一个列表类型，如果导航属性定义为接口，则默认使用List<T>来实例化
TypeRuntimeInfo navTypeRuntime2 = navType.IsInterface
? TypeRuntimeInfoCache.GetRuntimeInfo(typeof(List <>).MakeGenericType(navTypeRuntime.GenericArguments[0]))
: navTypeRuntime;
navCollection = navTypeRuntime2.ConstructInvoker.Invoke();
navInvoker.Invoke(model, navCollection);
}
}
if (!_deserializers.TryGetValue(keyName, out deserializer))
{
deserializer = InternalTypeDeserializer.GetTypeDeserializer(navType.IsGenericType ? navTypeRuntime.GenericArguments[0] : navType, _reader, _definition.Columns, start, end);
_deserializers[keyName] = deserializer;
}
// 如果整个导航链中某一个导航属性为空，则跳出递归
object navModel = deserializer(_reader);
if (navModel != null)
{
if (navCollection == null)
{
// 非集合型导航属性
navInvoker.Invoke(model, navModel);
//
//
//
}
else
{
// 集合型导航属性
if (prevModel != null && isThisLine)
{
#region 合并列表
// 判断如果属于同一个主表，则合并到上一行的当前明细列表
// 例：CRM_SaleOrder.Client.AccountList
string[] keys = keyName.Split('.');
TypeRuntimeInfo curTypeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo <T>();
Type curType = curTypeRuntime.Type;
MemberInvokerBase curInvoker = null;
object curModel = prevModel;
for (int i = 1; i < keys.Length; i++)
{
curInvoker = curTypeRuntime.GetInvoker(keys[i]);
curModel = curInvoker.Invoke(curModel);
if (curModel == null)
{
continue;
}
curType = curModel.GetType();
curTypeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(curType);
// <<<<<<<<<<< 一对多对多关系 >>>>>>>>>>
if (curType.IsGenericType && i != keys.Length - 1)
{
curTypeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(curType);
//if (curTypeRuntime.GenericTypeDefinition == typeof(List<>))
if (TypeUtils.IsCollectionType(curType))
{
var invoker = curTypeRuntime.GetInvoker("get_Count");
int count = Convert.ToInt32(invoker.Invoke(curModel)); // List.Count
if (count > 0)
{
var invoker2 = curTypeRuntime.GetInvoker("get_Item");
curModel = invoker2.Invoke(curModel, count - 1); // List[List.Count-1]
curTypeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(curModel.GetType());
}
else
{
// user.Roles.RoleFuncs=>Roles 列表有可能为空
curModel = null;
break;
}
}
}
}
if (curModel != null)
{
// 如果有两个以上的一对多关系的导航属性，那么在加入列表之前就需要剔除重复的实体
bool isAny = false;
if (_definition.Navigations.Count > 1)
{
if (_listNavigationCount == null)
{
_listNavigationCount = _definition.Navigations.Count(x => CheckCollectionNavigation(x.Value.Member));
}
if (_listNavigationCount != null && _listNavigationCount.Value > 1)
{
if (!_listNavigationKeys.ContainsKey(keyName))
{
_listNavigationKeys[keyName] = new HashSet <string>();
}
curTypeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(navModel.GetType());
StringBuilder keyBuilder = new StringBuilder(64);
foreach (var key in curTypeRuntime.KeyInvokers)
{
var invoker = key.Value;
var value = invoker.Invoke(navModel);
keyBuilder.AppendFormat("{0}={1};", key.Key, (value ?? string.Empty).ToString());
}
string hash = keyBuilder.ToString();
if (_listNavigationKeys[keyName].Contains(hash))
{
isAny = true;
}
else
{
_listNavigationKeys[keyName].Add(hash);
}
}
}
if (!isAny)
{
// 如果列表中不存在，则添加到上一行的相同导航列表中去
var myAddMethod = navTypeRuntime.GetInvoker("Add");
myAddMethod.Invoke(curModel, navModel);
}
}
#endregion
}
else
{
// 此时的 navTypeRuntime 是 List<> 类型的运行时
// 先添加 List 列表
var myAddMethod = navTypeRuntime.GetInvoker("Add");
myAddMethod.Invoke(navCollection, navModel);
var curTypeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(navModel.GetType());
StringBuilder keyBuilder = new StringBuilder(64);
foreach (var key in curTypeRuntime.KeyInvokers)
{
var wrapper = key.Value;
var value = wrapper.Invoke(navModel);
keyBuilder.AppendFormat("{0}={1};", key.Key, (value ?? string.Empty).ToString());
}
string hash = keyBuilder.ToString();
if (!_listNavigationKeys.ContainsKey(keyName))
{
_listNavigationKeys[keyName] = new HashSet <string>();
}
if (!_listNavigationKeys[keyName].Contains(hash))
{
_listNavigationKeys[keyName].Add(hash);
}
}
}
//if (navTypeRuntime.GenericTypeDefinition == typeof(List<>)) navTypeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(navTypeRuntime.GenericArguments[0]);
if (TypeUtils.IsCollectionType(navTypeRuntime.Type))
{
navTypeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(navTypeRuntime.GenericArguments[0]);
}
if (navTypeRuntime.NavInvokers.Count > 0)
{
Deserialize_Navigation(prevModel, navModel, keyName, isThisLine);
}
}
}
}
