// 获取成员包装器的外键特性
private ForeignKeyAttribute GetForeignKeyAttribute(FieldAccessorBase m, string memberName)
{
if (m == null)
{
throw new XFrameworkException("Member {0}.{1} not found.", _type.Name, memberName);
}
var attribute = m.GetCustomAttribute <ForeignKeyAttribute>();
if (attribute == null)
{
// 如果是属性，要求标记为 virtual
var property = m as PropertyAccessor;
if (property != null)
{
var getMethod = property.Member.GetGetMethod(true);
if (getMethod != null && !getMethod.IsVirtual)
{
return(null);
}
}
// 区分一对一和一对多导航属性
var navEntityType = m.CLRType.IsGenericType ? m.CLRType.GetGenericArguments()[0] : m.CLRType;
var navTypeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(navEntityType);
if (TypeUtils.IsCollectionType(m.CLRType))
{
// 1:n 关系，外键实体必须持有当前实体的所有主键属性
int index = 0;
string[] innerKeys = null;
string[] outerKeys = null;
foreach (FieldAccessorBase inner in this.KeyMembers)
{
if (!navTypeRuntime.Members.Contains(inner.Name))
{
innerKeys = null;
outerKeys = null;
break;
}
else
{
var outer = navTypeRuntime.GetMember <FieldAccessorBase>(inner.Name);
if (outer == null)
{
innerKeys = null;
outerKeys = null;
break;
}
else
{
if (innerKeys == null)
{
innerKeys = new string[this.KeyMembers.Count];
}
if (outerKeys == null)
{
outerKeys = new string[this.KeyMembers.Count];
}
innerKeys[index] = inner.Column != null && !string.IsNullOrEmpty(inner.Column.Name) ? inner.Column.Name : inner.Name;
outerKeys[index] = inner.Column != null && !string.IsNullOrEmpty(inner.Column.Name) ? inner.Column.Name : inner.Name;
}
}
index += 1;
}
if (innerKeys != null)
{
attribute = new ForeignKeyAttribute(innerKeys, outerKeys);
}
}
else
{
// 1:1 关系，分两种情况
// 1. 当前实体持有外键实体的主键属性
// 2. 外键实体持有当前实体的主键属性
if (navTypeRuntime.KeyMembers.Count > 0)
{
int index = 0;
string[] innerKeys = null;
string[] outerKeys = null;
foreach (FieldAccessorBase outer in navTypeRuntime.KeyMembers)
{
if (!this.Members.Contains(outer.Name))
{
innerKeys = null;
outerKeys = null;
break;
}
else
{
var inner = this.GetMember <FieldAccessorBase>(outer.Name);
if (inner == null)
{
innerKeys = null;
outerKeys = null;
break;
}
else
{
if (innerKeys == null)
{
innerKeys = new string[navTypeRuntime.KeyMembers.Count];
}
if (outerKeys == null)
{
outerKeys = new string[navTypeRuntime.KeyMembers.Count];
}
innerKeys[index] = inner.Column != null && !string.IsNullOrEmpty(inner.Column.Name) ? inner.Column.Name : inner.Name;
outerKeys[index] = outer.Column != null && !string.IsNullOrEmpty(outer.Column.Name) ? outer.Column.Name : outer.Name;
}
}
index += 1;
}
if (innerKeys != null)
{
attribute = new ForeignKeyAttribute(innerKeys, outerKeys);
}
}
if (attribute == null)
{
int index = 0;
string[] innerKeys = null;
string[] outerKeys = null;
foreach (FieldAccessorBase inner in this.KeyMembers)
{
if (!navTypeRuntime.Members.Contains(inner.Name))
{
innerKeys = null;
outerKeys = null;
break;
}
else
{
var outer = navTypeRuntime.GetMember <FieldAccessorBase>(inner.Name);
if (outer == null)
{
innerKeys = null;
outerKeys = null;
break;
}
else
{
if (innerKeys == null)
{
innerKeys = new string[this.KeyMembers.Count];
}
if (outerKeys == null)
{
outerKeys = new string[this.KeyMembers.Count];
}
innerKeys[index] = inner.Column != null && !string.IsNullOrEmpty(inner.Column.Name) ? inner.Column.Name : inner.Name;
outerKeys[index] = inner.Column != null && !string.IsNullOrEmpty(inner.Column.Name) ? inner.Column.Name : inner.Name;
}
}
index += 1;
}
if (innerKeys != null)
{
attribute = new ForeignKeyAttribute(innerKeys, outerKeys);
}
}
}
}
return(attribute);
}
/// <summary>
/// 获取当前类型的所有成员
/// </summary>
protected virtual IEnumerable <MemberInfo> GetTypeMembers(Type type, bool @private)
{
return(TypeUtils.GetMembers(type, @private));
}
/// <summary>
/// 将 <see cref="IDataRecord"/> 上的当前行反序列化为实体
/// </summary>
/// <param name="prevModel">前一行数据</param>
/// <param name="isThisLine">是否同一行数据</param>
/// <returns></returns>
internal object Deserialize(object prevModel, out bool isThisLine)
{
isThisLine = false;
#region 基元类型
if (_isPrimitive == null)
{
_isPrimitive = TypeUtils.IsPrimitiveType(_entityType) || _reader.GetName(0) == AppConst.AUTO_INCREMENT_NAME;
}
if (_isPrimitive.Value)
{
if (_reader.IsDBNull(0))
{
return(TypeUtils.GetNullValue(_entityType)); //default(T);
}
var obj = _reader.GetValue(0);
if (obj.GetType() != _entityType)
{
// fix#Nullable<T> issue
if (!_entityType.IsGenericType)
{
obj = Convert.ChangeType(obj, _entityType);
}
else
{
Type type2 = _entityType.GetGenericTypeDefinition();
if (type2 != typeof(Nullable <>))
{
throw new NotSupportedException(string.Format("type {0} not suppored.", type2.FullName));
}
obj = Convert.ChangeType(obj, Nullable.GetUnderlyingType(_entityType));
}
}
return(obj);
}
#endregion
#region 动态类型
if (_isDynamic)
{
ExpandoObject obj = new ExpandoObject();
var result = ((IDictionary <string, object>)obj);
for (int i = 0; i < _reader.FieldCount; i++)
{
var value = _reader.GetValue(i);
if (value == DBNull.Value)
{
value = null;
}
result.Add(_reader.GetName(i), value);
}
return((dynamic)obj);
}
#endregion
#region 实体类型
object model = null;
if (_map == null || _map.SelectedNavs == null || _map.SelectedNavs.Count == 0)
{
// 没有字段映射说明或者没有导航属性
if (_entityDeserializer == null)
{
_entityDeserializer = _deserializerImpl.GetTypeDeserializer(_entityType, _reader, _map != null ? _map.SelectedColumns : null, 0);
}
model = _entityDeserializer(_reader);
}
else
{
// 第一层
if (_entityDeserializer == null)
{
_entityDeserializer = _deserializerImpl.GetTypeDeserializer(_entityType, _reader, _map.SelectedColumns, 0, _map.SelectedNavs.MinIndex);
}
model = _entityDeserializer(_reader);
// 若有 1:n 的导航属性，判断当前行数据与上一行数据是否相同
if (prevModel != null && _map.HasMany)
{
isThisLine = true;
foreach (var m in _typeRuntime.KeyMembers)
{
var value1 = m.Invoke(prevModel);
var value2 = m.Invoke(model);
isThisLine = isThisLine && value1.Equals(value2);
if (!isThisLine)
{
// Fix issue#换行时清空上一行的导航键缓存
_manyNavigationKeys.Clear();
break;
}
}
}
// 递归导航属性
this.Deserialize_Navigation(isThisLine ? prevModel : null, model, string.Empty, isThisLine);
}
return(model);
#endregion
}
/// <summary>
/// 初始化 <see cref="TypeRuntimeInfo"/> 类的新实例
/// </summary>
/// <param name="type">类型声明</param>
/// <param name="includePrivates">包含私有成员</param>
internal TypeRuntimeInfo(Type type, bool includePrivates)
{
_type = type;
_isAnonymousType = TypeUtils.IsAnonymousType(_type);
_includePrivates = includePrivates;
}
// 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 _map.Navigations)
foreach (var navigation in _map.SelectedNavs)
{
int start = -1;
int end = -1;
if (navigation.FieldCount > 0)
{
start = navigation.StartIndex;
end = navigation.StartIndex + navigation.FieldCount;
}
string keyName = typeName + "." + navigation.Name;
if (keyName != navigation.Key)
{
continue;
}
var navMember = typeRuntime.GetMember <FieldAccessorBase>(navigation.Name);
if (navMember == null)
{
continue;
}
Type navType = navMember.CLRType;
Func <IDataRecord, object> deserializer = null;
TypeRuntimeInfo navTypeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(navType);
object navCollection = null;
if (TypeUtils.IsCollectionType(navType))
{
// 1：n关系，导航属性为 List<T>
navCollection = navMember.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.Constructor.Invoke();
navMember.Invoke(model, navCollection);
}
}
if (!_deserializers.TryGetValue(keyName, out deserializer))
{
deserializer = _deserializerImpl.GetTypeDeserializer(navType.IsGenericType ? navTypeRuntime.GenericArguments[0] : navType, _reader, _map.SelectedColumns, 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
navMember.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(_entityType);
Type curType = curTypeRuntime.Type;
MemberAccessorBase curAccessor = null;
object curModel = prevModel;
for (int i = 1; i < keys.Length; i++)
{
curAccessor = curTypeRuntime.GetMember(keys[i]);
curModel = curAccessor.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 member_Count = curTypeRuntime.GetMember("get_Count");
int count = Convert.ToInt32(member_Count.Invoke(curModel)); // List.Count
if (count > 0)
{
var member_Index = curTypeRuntime.GetMember("get_Item");
curModel = member_Index.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 (_map.SelectedNavs.Count > 1)
{
if (_manyNavigationNumber == null)
{
_manyNavigationNumber = _map.SelectedNavs.Count(x => HasMany(x.Member));
}
if (_manyNavigationNumber != null && _manyNavigationNumber.Value > 1)
{
if (!_manyNavigationKeys.ContainsKey(keyName))
{
_manyNavigationKeys[keyName] = new HashSet <string>();
}
curTypeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(navModel.GetType());
StringBuilder keyBuilder = new StringBuilder(64);
foreach (var m in curTypeRuntime.KeyMembers)
{
var value = m.Invoke(navModel);
keyBuilder.AppendFormat("{0}={1};", m.Name, (value ?? string.Empty).ToString());
}
string hash = keyBuilder.ToString();
if (_manyNavigationKeys[keyName].Contains(hash))
{
isAny = true;
}
else
{
_manyNavigationKeys[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 member_Add = navTypeRuntime.GetMember("Add");
member_Add.Invoke(curModel, navModel);
}
}
#endregion
}
else
{
// 此时的 navTypeRuntime 是 List<> 类型的运行时
// 先添加 List 列表
var member_Add = navTypeRuntime.GetMember("Add");
member_Add.Invoke(navCollection, navModel);
var curTypeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(navModel.GetType());
StringBuilder keyBuilder = new StringBuilder(64);
foreach (var m in curTypeRuntime.KeyMembers)
{
var value = m.Invoke(navModel);
keyBuilder.AppendFormat("{0}={1};", m.Name, (value ?? string.Empty).ToString());
}
string hash = keyBuilder.ToString();
if (!_manyNavigationKeys.ContainsKey(keyName))
{
_manyNavigationKeys[keyName] = new HashSet <string>();
}
if (!_manyNavigationKeys[keyName].Contains(hash))
{
_manyNavigationKeys[keyName].Add(hash);
}
}
}
if (TypeUtils.IsCollectionType(navTypeRuntime.Type))
{
navTypeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(navTypeRuntime.GenericArguments[0]);
}
if (navTypeRuntime.NavMembers.Count > 0)
{
Deserialize_Navigation(prevModel, navModel, keyName, isThisLine);
}
}
}
}
