/// <summary>
/// 从读取器中读取数据到对象
/// </summary>
/// <param name="reader"></param>
public virtual void Read(DME_BinaryReader reader)
{
Read(this, reader, true, true, false);
}
/// <summary>
/// 从读取器中读取数据到对象的成员中
/// </summary>
/// <param name="target">目标</param>
/// <param name="reader">读取器</param>
/// <param name="member">成员</param>
/// <param name="encodeInt">使用7Bit编码整数</param>
/// <param name="allowNull">是否允许对象为空，如果允许，则读取时先读取一个字节判断对象是否为空</param>
protected virtual void ReadMember(Object target, DME_BinaryReader reader, DME_MemberInfo member, Boolean encodeInt, Boolean allowNull)
{
Object value = null;
MemberTypes mt = member.Member.MemberType;
if (mt == MemberTypes.Field || mt == MemberTypes.Property)
{
if (!TryRead(target, reader, member, encodeInt, allowNull, out value)) throw new InvalidOperationException("无法读取数据，如果是复杂类型请实现IBinaryAccessor接口。");
member.SetValue(target, value);
}
else
throw new ArgumentOutOfRangeException("member", "成员只能是FieldInfo或PropertyInfo。");
}
Boolean TryRead(Object target, DME_BinaryReader reader, DME_MemberInfo member, Boolean encodeInt, Boolean allowNull, out Object value)
{
Type type = member.Type;
// 基本类型
if (reader.TryReadValue(type, encodeInt, out value)) return true;
// 允许空时，先读取一个字节判断对象是否为空
if (allowNull && reader.ReadByte() == 0) return true;
#region 接口支持
//if (Array.IndexOf(member.Type.GetInterfaces(), typeof(IBinaryAccessor)) >= 0)
if (typeof(DME_IBinaryAccessor).IsAssignableFrom(member.Type))
{
// 读取对象
Object obj = member.GetValue(target);
// 实例化对象
if (obj == null)
{
obj = Activator.CreateInstance(type);
member.SetValue(target, obj);
}
if (obj == null) return false;
// 调用接口
DME_IBinaryAccessor accessor = obj as DME_IBinaryAccessor;
accessor.Read(reader);
return true;
}
#endregion
#region 枚举
if (typeof(IEnumerable).IsAssignableFrom(member.Type))
{
// 先读元素个数
Int32 count = reader.ReadEncodedInt32();
if (count < 0) throw new InvalidOperationException("无效元素个数" + count + "！");
Type elementType = member.Type;
if (member.Type.HasElementType)
elementType = member.Type.GetElementType();
else if (member.Type.IsGenericType)
{
Type[] ts = member.Type.GetGenericArguments();
if (ts != null && ts.Length > 0) elementType = ts[0];
}
Array arr = Array.CreateInstance(elementType, count);
for (int i = 0; i < count; i++)
{
if (allowNull && reader.ReadEncodedInt32() == 0) continue;
Object obj = null;
if (!reader.TryReadValue(elementType, encodeInt, out obj))
{
obj = CreateInstance(elementType);
Read(obj, reader, encodeInt, allowNull, member.Member.MemberType == MemberTypes.Property);
}
arr.SetValue(obj, i);
}
value = Activator.CreateInstance(member.Type, arr);
return true;
}
#endregion
return false;
}
/// <summary>
/// 从读取器中读取数据到对象，指定读取属性还是字段
/// </summary>
/// <param name="target">目标</param>
/// <param name="reader">读取器</param>
/// <param name="encodeInt">使用7Bit编码整数</param>
/// <param name="allowNull">是否允许对象为空，如果允许，则写入时增加一个字节表示对象是否为空</param>
/// <param name="isProperty"></param>
protected void Read(Object target, DME_BinaryReader reader, Boolean encodeInt, Boolean allowNull, Boolean isProperty)
{
if (target == null) throw new ArgumentNullException("target", "目标对象不能为空！");
if (isProperty)
{
PropertyInfo[] pis = FindProperties(target.GetType());
if (pis == null || pis.Length < 1) return;
foreach (PropertyInfo item in pis)
{
ReadMember(target, reader, item, encodeInt, allowNull);
}
}
else
{
FieldInfo[] fis = FindFields(target.GetType());
if (fis == null || fis.Length < 1) return;
foreach (FieldInfo item in fis)
{
ReadMember(target, reader, item, encodeInt, allowNull);
}
}
}
