/// <summary> 读取一个值对象
/// </summary>
/// <param name="reader"></param>
/// <param name="type"></param>
/// <returns></returns>
private object ReadValue(UnsafeJsonReader reader, Type type)
{
if (reader.IsEnd())
{
ThrowException("字符串意外结束!");
}
var c = reader.Current;
switch (c)
{
case '[':
reader.MoveNext();
var array = ReadArray(reader, type);
if (reader.Current != ']')
{
ThrowException("缺少闭合的 ]");
}
reader.MoveNext();
return(array);
case '{':
reader.MoveNext();
var obj = ReadObject(reader, type);
if (reader.Current != '}')
{
ThrowException("缺少闭合的 }");
}
reader.MoveNext();
return(obj);
case '"':
case '\'': {
if (type == typeof(DateTime))
{
return(reader.ReadDateTime());
}
return(ParseString(reader, type));
}
default: {
object val = reader.ReadConsts();
return(ChangeType(val, type));
}
}
}
/// <summary> 将字符串解析为指定类型
/// </summary>
/// <param name="reader"></param>
/// <param name="type"></param>
/// <returns></returns>
private static object ParseString(UnsafeJsonReader reader, Type type) {
string str;
var typecode = Type.GetTypeCode(type);
if ((typecode >= TypeCode.SByte && typecode <= TypeCode.Decimal) || typecode == TypeCode.Boolean) {
if (type.IsSubclassOf(typeof(Enum))) {
return Enum.Parse(type, reader.ReadString());
}
char quot = reader.Current;
reader.MoveNext();
var val = ChangeType(reader.ReadConsts(), type);
if (reader.SkipChar(quot) == false) {
ThrowMissingCharException(quot);
}
return val;
}
switch (typecode) {
case TypeCode.DateTime:
return reader.ReadDateTime();
case TypeCode.Object:
str = reader.ReadString();
if (type == typeof(Guid)) {
if (str.Length > 30)//这个是从fastJson学来的 =^_^=
{
return new Guid(str);
}
return new Guid(Convert.FromBase64String(str));
}
if (type == typeof(Object)) {
return str;
}
throw new Exception();
case TypeCode.Char:
return Char.Parse(reader.ReadString());
case TypeCode.String:
return reader.ReadString();
case TypeCode.DBNull:
str = reader.ReadString();
if (str.Length == 0 ||
str == "null" ||
str == "undefined" ||
string.IsNullOrEmpty(str)) {
return DBNull.Value;
}
throw new Exception();
default:
return ChangeType(reader.ReadString(), type);
}
}
/// <summary> 读取一个值对象
/// </summary>
/// <param name="reader"></param>
/// <param name="type"></param>
/// <returns></returns>
private object ReadValue(UnsafeJsonReader reader, Type type) {
if (reader.IsEnd()) {
ThrowException("字符串意外结束!");
}
var c = reader.Current;
switch (c) {
case '[':
reader.MoveNext();
var array = ReadArray(reader, type);
if (reader.Current != ']') {
ThrowException("缺少闭合的 ]");
}
reader.MoveNext();
return array;
case '{':
reader.MoveNext();
var obj = ReadObject(reader, type);
if (reader.Current != '}') {
ThrowException("缺少闭合的 }");
}
reader.MoveNext();
return obj;
case '"':
case '\'': {
if (type == typeof(DateTime)) {
return reader.ReadDateTime();
}
return ParseString(reader, type);
}
default: {
object val = reader.ReadConsts();
return ChangeType(val, type);
}
}
}
/// <summary> 将字符串解析为指定类型
/// </summary>
/// <param name="reader"></param>
/// <param name="type"></param>
/// <returns></returns>
private static object ParseString(UnsafeJsonReader reader, Type type)
{
string str;
var typecode = Type.GetTypeCode(type);
if ((typecode >= TypeCode.SByte && typecode <= TypeCode.Decimal) || typecode == TypeCode.Boolean)
{
if (type.IsSubclassOf(typeof(Enum)))
{
return(Enum.Parse(type, reader.ReadString()));
}
char quot = reader.Current;
reader.MoveNext();
var val = ChangeType(reader.ReadConsts(), type);
if (reader.SkipChar(quot) == false)
{
ThrowMissingCharException(quot);
}
return(val);
}
switch (typecode)
{
case TypeCode.DateTime:
return(reader.ReadDateTime());
case TypeCode.Object:
str = reader.ReadString();
if (type == typeof(Guid))
{
if (str.Length > 30) //这个是从fastJson学来的 =^_^=
{
return(new Guid(str));
}
return(new Guid(Convert.FromBase64String(str)));
}
if (type == typeof(Object))
{
return(str);
}
throw new Exception();
case TypeCode.Char:
return(Char.Parse(reader.ReadString()));
case TypeCode.String:
return(reader.ReadString());
case TypeCode.DBNull:
str = reader.ReadString();
if (str.Length == 0 ||
str == "null" ||
str == "undefined" ||
string.IsNullOrEmpty(str))
{
return(DBNull.Value);
}
throw new Exception();
default:
return(ChangeType(reader.ReadString(), type));
}
}
