private static bool DoAsterisk(ref StateContext context)
{
if (context.IsWhitespace())
{
return(true);
}
switch (context.Character)
{
case ',':
context.Include("*");
context.State = State.None;
return(true);
case '}':
context.Include("*");
context.Pop();
context.State = State.None;
return(true);
default:
context.OnError($"SyntaxError: Contains the illegal character '{context.Character}' in the data schema.");
return(false);
}
}
private static bool DoNone(ref StateContext context)
{
if (context.IsWhitespace())
{
return(true);
}
switch (context.Character)
{
case '*':
context.State = State.Asterisk;
return(true);
case '!':
context.State = State.Exclude;
return(true);
case '}':
return(context.Pop() != null);
case ',':
return(true);
default:
if (context.IsLetterOrUnderscore())
{
context.Accept();
context.State = State.Include;
return(true);
}
context.OnError($"SyntaxError: Contains the illegal character '{context.Character}' in the data schema.");
return(false);
}
}
private static bool DoInclude(ref StateContext context)
{
switch (context.Character)
{
case ',':
context.Include();
context.State = State.None;
break;
case ':':
context.Include();
context.State = State.PagingCount;
break;
case '(':
context.Include();
context.State = State.SortingField;
break;
case '{':
context.Include();
context.Push();
context.State = State.None;
break;
case '}':
context.Include();
context.Pop();
context.State = State.None;
break;
default:
if (context.IsLetterOrDigitOrUnderscore())
{
//判断标识中间是否含有空白字符
if (context.Flags.HasWhitespace())
{
context.OnError("SyntaxError: The identifier of the data schema contains whitespace characters.");
return(false);
}
context.Accept();
}
else if (!context.IsWhitespace())
{
context.OnError($"SyntaxError: The identifier of the data schema contains '{context.Character}' illegal character.");
return(false);
}
break;
}
//重置是否含有空格的标记
context.Flags.HasWhitespace(context.IsWhitespace());
return(true);
}
private static bool DoExclude(ref StateContext context)
{
switch (context.Character)
{
case ',':
context.Exclude();
context.State = State.None;
break;
case '}':
context.Exclude();
context.Pop();
context.State = State.None;
break;
default:
if (context.IsLetterOrDigitOrUnderscore())
{
//如果首字符是数字，则激发错误
if (char.IsDigit(context.Character) && !context.HasBuffer())
{
context.OnError("SyntaxError: The identifier of the data schema cannot start with a digit.");
return(false);
}
//判断标识中间是否含有空白字符
if (context.Flags.HasWhitespace())
{
context.OnError("SyntaxError: The identifier of the data schema contains whitespace characters.");
return(false);
}
context.Accept();
}
else if (!context.IsWhitespace())
{
context.OnError($"SyntaxError: The identifier of the data schema contains '{context.Character}' illegal character.");
return(false);
}
break;
}
//重置是否含有空格的标记
context.Flags.HasWhitespace(context.IsWhitespace());
return(true);
}
private static bool DoExclude(ref StateContext context)
{
switch (context.Character)
{
case ',':
context.Exclude();
context.State = State.None;
break;
case '}':
context.Exclude();
context.Pop();
context.State = State.None;
break;
default:
if (context.IsLetterOrDigitOrUnderscore())
{
//如果首字符是数字，则激发错误
if (char.IsDigit(context.Character) && !context.HasBuffer())
{
context.OnError("");
return(false);
}
//判断标识中间是否含有空白字符
if (context.Flags.HasWhitespace())
{
context.OnError("");
return(false);
}
context.Accept();
}
else if (!context.IsWhitespace())
{
context.OnError("");
return(false);
}
break;
}
//重置是否含有空格的标记
context.Flags.HasWhitespace(context.IsWhitespace());
return(true);
}
private static bool DoNone(ref StateContext context)
{
if (context.IsWhitespace())
{
return(true);
}
switch (context.Character)
{
case '*':
//context.Accept();
context.State = State.Asterisk;
return(true);
case '!':
context.State = State.Exclude;
return(true);
case '}':
return(context.Pop() != null);
case ',':
return(true);
default:
if (context.IsLetterOrUnderscore())
{
context.Accept();
context.State = State.Include;
return(true);
}
context.OnError("");
return(false);
}
}
