/// <summary>
/// 读取扩展成员
/// </summary>
/// <param name="reader"></param>
/// <param name="dataItem"></param>
public virtual void ReadExtendProperty(BinaryReader reader, DataFieldItem dataItem)
{
PropertyInfo property = dataItem.Property;
DataFieldAttribute att = dataItem.Attribute;
if (att.RefType == typeof(Int32))
{
return;
}
long offset = 0;
if (property.PropertyType == typeof(Int32))
{
offset = (Int32)property.GetValue(this, null);
}
else
{
offset = (Int16)property.GetValue(this, null);
}
if (offset <= 0)
{
return;
}
// 检查位移是否超出文件结尾
long address = GetRealAddress(offset, att.RefKind);
// 超出文件结尾时，终止读取
if (address <= 0 || address > reader.BaseStream.Length)
{
Extends.Add(property.Name, null);
return;
}
// 读取扩展数据
if (att.RefType == typeof(String))
{
// 字符串仅仅是偏移量，需要加上基地址
//Seek(reader, Address + offset);
Seek(reader, address);
String str = ReadString(reader);
//Extends[property.Name] = str;
Extends.Add(property.Name, str);
}
else
{
//offset = GetRealAddress(offset, att.RefKind);
// 简单对象/对象集合
if (String.IsNullOrEmpty(att.SizeField))
{
#region 简单对象
// 首先判断是否在全局缓存里面
if (!Info.Objects.ContainsKey(address))
{
// 创建对象
EntityBase2 entity = Activator.CreateInstance(att.RefType) as EntityBase2;
if (entity == null)
{
throw new InvalidOperationException(String.Format("引用成员{0}.{1}的引用类型{2}无法识别！", this.GetType().Name, property.Name, att.RefType.Name));
}
Seek(reader, address);
entity.Info = Info;
// 读取对象
entity.Read(reader);
//Extends[property.Name] = entity;
//Info.Objects[offset] = entity;
// 故意使用Add方法，避免重新赋值
Extends.Add(property.Name, entity);
//Info.Objects.Add(offset, entity);
}
else
{
//Extends[property.Name] = Info.Objects[offset];
Extends.Add(property.Name, Info.Objects[address]);
//#if DEBUG
// WriteLine("地址0x{0:X}已分析！", offset);
//#endif
}
#endregion
}
else
{
// Info.Objects只存单个对象，不存集合，所以这里不用判断
// 创建对象
EntityBase2 entity = Activator.CreateInstance(att.RefType) as EntityBase2;
if (entity == null)
{
throw new InvalidOperationException(String.Format("引用成员{0}.{1}的引用类型{2}无法识别！", this.GetType().Name, property.Name, att.RefType.Name));
}
Int32 size = Convert.ToInt32(this[att.SizeField]);
if (size > 0)
{
// 先移到第一个对象所在位置
Seek(reader, address);
entity.Info = Info;
Object list = entity.ReadExtendList(reader, size);
//Extends[property.Name] = list;
//Info.Objects[offset] = list;
Extends.Add(property.Name, list);
//Info.Objects.Add(offset, list);
}
}
}
}
/// <summary>
/// 读取指定成员
/// </summary>
/// <param name="reader"></param>
/// <param name="dataItem"></param>
public virtual void ReadProperty(BinaryReader reader, DataFieldItem dataItem)
{
PropertyInfo property = dataItem.Property;
DataFieldAttribute att = dataItem.Attribute;
switch (Type.GetTypeCode(property.PropertyType))
{
case TypeCode.Boolean:
break;
case TypeCode.Byte:
property.SetValue(this, reader.ReadByte(), null);
return;
case TypeCode.Char:
break;
case TypeCode.DBNull:
break;
case TypeCode.DateTime:
break;
case TypeCode.Decimal:
break;
case TypeCode.Double:
break;
case TypeCode.Empty:
break;
case TypeCode.Int16:
property.SetValue(this, reader.ReadInt16(), null);
return;
case TypeCode.Int32:
property.SetValue(this, reader.ReadInt32(), null);
return;
case TypeCode.Int64:
property.SetValue(this, reader.ReadInt64(), null);
return;
case TypeCode.Object:
if (property.PropertyType == typeof(Byte[]))
{
if (att.Size <= 0)
{
throw new InvalidOperationException(String.Format("字节数组{0}.{1}的大小未设置！", this.GetType().Name, property.Name));
}
property.SetValue(this, reader.ReadBytes(att.Size), null);
return;
}
break;
case TypeCode.SByte:
break;
case TypeCode.Single:
break;
case TypeCode.String:
Int32 size = att.Size;
if (size <= 0)
{
if (!String.IsNullOrEmpty(att.SizeField))
{
size = Convert.ToInt32(this[att.SizeField]);
}
if (size <= 0)
{
throw new InvalidOperationException(String.Format("字符串{0}.{1}的长度未设置！", this.GetType().Name, property.Name));
}
}
Byte[] buf = reader.ReadBytes(size);
List <Byte> list = new List <Byte>();
foreach (Byte item in buf)
{
if (item != 0)
{
list.Add(item);
}
}
if (list.Count > 0)
{
buf = list.ToArray();
property.SetValue(this, Encoding.UTF8.GetString(buf), null);
}
return;
case TypeCode.UInt16:
property.SetValue(this, reader.ReadUInt16(), null);
return;
case TypeCode.UInt32:
property.SetValue(this, reader.ReadUInt32(), null);
return;
case TypeCode.UInt64:
property.SetValue(this, reader.ReadUInt64(), null);
return;
default:
break;
}
throw new InvalidOperationException(String.Format("{0}.{1}的类型{2}不受支持！", this.GetType().Name, property.Name, property.PropertyType.Name));
}
