/// <summary>
/// 初始化成员包装器集合
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
protected virtual MemberInvokerCollection InitializeInvokers(Type type)
{
// fix issue#多线程下导致 FieldCount 不正确
// 单个实例只初始化一次
//Fixed issue#匿名类的属性不可写
//匿名类：new{ClientId=a.ClientId}
if (!_isInitialize)
{
lock (_lock)
{
if (!_isInitialize)
{
var invokers = new MemberInvokerCollection();
var collection = this.GetMembers(type, _private).Select(x => MemberInvokerBase.Create(x));
foreach (MemberInvokerBase invoker in collection)
{
if (invoker.GetCustomAttribute <System.Runtime.CompilerServices.CompilerGeneratedAttribute>() != null)
{
continue;
}
// 判断当前成员是否重复
if (invokers.Contains(invoker.Name))
{
// 属性和字段不允许重复
if (invoker.Member.MemberType != MemberTypes.Method)
{
continue;
}
else
{
// 方法成员考虑到有重载的情况，允许重复
int dup = invokers.Count(x => x.Member.Name == invoker.Name);
invoker.Name = string.Format("{0}{1}", invoker.Name, dup);
}
}
// 添加成员
invokers.Add(invoker);
// 累计数据字段，即与数据库一一对应的字段
bool isDataField = !(invoker.Column != null && invoker.Column.NoMapped || invoker.ForeignKey != null || invoker.Member.MemberType == MemberTypes.Method);
if (isDataField)
{
_dataFieldCount += 1;
}
}
_invokers = invokers;
_isInitialize = true;
}
}
}
return(_invokers);
}
// 选择所有的字段
private Expression VisitAllMember(Type type, string alias, Expression node = null)
{
if (_groupBy != null && node != null && node.IsGrouping())
{
// select g.Key
LambdaExpression keySelector = _groupBy.Expressions[0] as LambdaExpression;
return(this.Visit(keySelector.Body));
}
else
{
TypeRuntimeInfo typeRuntime = TypeRuntimeInfoCache.GetRuntimeInfo(type);
MemberInvokerCollection invokers = typeRuntime.Invokers;
foreach (var invoker in invokers)
{
if (invoker != null && invoker.Column != null && invoker.Column.NoMapped)
{
continue;
}
if (invoker != null && invoker.ForeignKey != null)
{
continue; // 不加载导航属性
}
if (invoker.Member.MemberType == System.Reflection.MemberTypes.Method)
{
continue;
}
_builder.AppendMember(alias, invoker.Member.Name);
// 选择字段
string newName = _pickColumns.Add(invoker.Member.Name);
_builder.AppendAs(newName);
_builder.Append(",");
_builder.AppendNewLine();
}
}
return(node);
}
