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($"SyntaxError: The identifier of the data schema contains '{context.Character}' illegal character.");
return(false);
}
break;
}
//重置是否含有空格的标记
context.Flags.HasWhitespace(context.IsWhitespace());
return(true);
}
private static bool DoExclude(ref StateContext context)
{
switch (context.Character)
{
case ',':
context.Exclude();
context.State = State.None;
break;
case '}':
context.Exclude();
context.Pop();
context.State = State.None;
break;
default:
if (context.IsLetterOrDigitOrUnderscore())
{
//如果首字符是数字，则激发错误
if (char.IsDigit(context.Character) && !context.HasBuffer())
{
context.OnError("");
return(false);
}
//判断标识中间是否含有空白字符
if (context.Flags.HasWhitespace())
{
context.OnError("");
return(false);
}
context.Accept();
}
else if (!context.IsWhitespace())
{
context.OnError("");
return(false);
}
break;
}
//重置是否含有空格的标记
context.Flags.HasWhitespace(context.IsWhitespace());
return(true);
}
private static bool DoSortingField(ref StateContext context)
{
switch (context.Character)
{
case '~':
case '!':
if (context.HasBuffer())
{
context.OnError("SyntaxError: Expected sorting field in the data schema, but missing.");
return(false);
}
context.Accept();
return(true);
case ',':
if (context.AddSorting())
{
context.State = State.SortingGutter;
return(true);
}
return(false);
case ')':
if (context.AddSorting())
{
context.State = State.Include;
return(true);
}
return(false);
default:
if (context.IsLetterOrDigitOrUnderscore())
{
context.Accept();
return(true);
}
context.OnError($"SyntaxError: The sorting field of the data schema contains '{context.Character}' illegal character.");
return(false);
}
}
private static bool DoSortingField(ref StateContext context)
{
switch (context.Character)
{
case '~':
case '!':
if (context.HasBuffer())
{
context.OnError("");
return(false);
}
context.Accept();
return(true);
case ',':
if (context.AddSorting())
{
context.State = State.SortingGutter;
return(true);
}
return(false);
case ')':
if (context.AddSorting())
{
context.State = State.Include;
return(true);
}
return(false);
default:
if (context.IsLetterOrDigitOrUnderscore())
{
context.Accept();
return(true);
}
context.OnError("");
return(false);
}
}
private static bool DoPagingSize(ref StateContext context)
{
string buffer;
switch (context.Character)
{
case '?':
if (context.HasBuffer())
{
context.OnError("SyntaxError: The pagination size format of the data schema is incorrect.");
return(false);
}
context.Current.Paging.PageSize = 20;
context.State = State.Include;
return(true);
case ',':
if (!context.TryGetBuffer(out buffer))
{
context.OnError("SyntaxError: Expected pagination size in the data schema, but missing.");
return(false);
}
context.Current.Paging.PageSize = int.Parse(buffer);
context.State = State.None;
return(true);
case '(':
if (!context.TryGetBuffer(out buffer))
{
context.OnError("SyntaxError: Expected pagination size in the data schema, but missing.");
return(false);
}
if (buffer != "?")
{
context.Current.Paging.PageSize = int.Parse(buffer);
}
context.State = State.SortingField;
return(true);
case '{':
if (!context.TryGetBuffer(out buffer))
{
context.OnError("SyntaxError: Expected pagination size in the data schema, but missing.");
return(false);
}
if (buffer != "?")
{
context.Current.Paging.PageSize = int.Parse(buffer);
}
context.Push();
context.State = State.None;
return(true);
default:
if (char.IsDigit(context.Character))
{
context.Accept();
return(true);
}
context.OnError($"SyntaxError: The pagination size of the data schema contains '{context.Character}' illegal character.");
return(false);
}
}
private static bool DoPagingCount(ref StateContext context)
{
string buffer;
switch (context.Character)
{
case '?':
if (context.HasBuffer())
{
context.OnError("SyntaxError: The pagination number format of the data schema is incorrect.");
return(false);
}
context.Current.Paging = null;
context.State = State.Include;
return(true);
case '*':
if (context.HasBuffer())
{
context.OnError("SyntaxError: The pagination number format of the data schema is incorrect.");
return(false);
}
context.Current.Paging = Paging.Disabled;
context.State = State.Include;
return(true);
case '/':
if (!context.TryGetBuffer(out buffer))
{
context.OnError("SyntaxError: Expected pagination number in the data schema, but missing.");
return(false);
}
context.Current.Paging = Paging.Page(int.Parse(buffer));
context.State = State.PagingSize;
return(true);
case '(':
if (!context.TryGetBuffer(out buffer))
{
context.OnError("SyntaxError: Expected pagination number in the data schema, but missing.");
return(false);
}
context.Current.Paging = Paging.Page(1, int.Parse(buffer));
context.State = State.SortingField;
return(true);
case '{':
if (!context.TryGetBuffer(out buffer))
{
context.OnError("SyntaxError: Expected pagination number in the data schema, but missing.");
return(false);
}
context.Current.Paging = Paging.Page(1, int.Parse(buffer));
context.Push();
context.State = State.None;
return(true);
default:
if (char.IsDigit(context.Character))
{
context.Accept();
return(true);
}
context.OnError($"SyntaxError: The pagination number of the data schema contains '{context.Character}' illegal character.");
return(false);
}
}
private static bool DoPagingSize(ref StateContext context)
{
string buffer;
switch (context.Character)
{
case '?':
if (context.HasBuffer())
{
context.OnError("");
return(false);
}
context.Current.Paging.PageSize = 20;
context.State = State.Include;
return(true);
case ',':
if (!context.TryGetBuffer(out buffer))
{
context.OnError("");
return(false);
}
context.Current.Paging.PageSize = int.Parse(buffer);
context.State = State.None;
return(true);
case '(':
if (!context.TryGetBuffer(out buffer))
{
context.OnError("");
return(false);
}
if (buffer != "?")
{
context.Current.Paging.PageSize = int.Parse(buffer);
}
context.State = State.SortingField;
return(true);
case '{':
if (!context.TryGetBuffer(out buffer))
{
context.OnError("");
return(false);
}
if (buffer != "?")
{
context.Current.Paging.PageSize = int.Parse(buffer);
}
context.Push();
context.State = State.None;
return(true);
default:
if (char.IsDigit(context.Character))
{
context.Accept();
return(true);
}
context.OnError("");
return(false);
}
}
private static bool DoPagingCount(ref StateContext context)
{
string buffer;
switch (context.Character)
{
case '?':
if (context.HasBuffer())
{
context.OnError("");
return(false);
}
context.Current.Paging = null;
context.State = State.Include;
return(true);
case '*':
if (context.HasBuffer())
{
context.OnError("");
return(false);
}
context.Current.Paging = Paging.Disable;
context.State = State.Include;
return(true);
case '/':
if (!context.TryGetBuffer(out buffer))
{
context.OnError("");
return(false);
}
context.Current.Paging = Paging.Page(int.Parse(buffer));
context.State = State.PagingSize;
return(true);
case '(':
if (!context.TryGetBuffer(out buffer))
{
context.OnError("");
return(false);
}
context.Current.Paging = Paging.Page(1, int.Parse(buffer));
context.State = State.SortingField;
return(true);
case '{':
if (!context.TryGetBuffer(out buffer))
{
context.OnError("");
return(false);
}
context.Current.Paging = Paging.Page(1, int.Parse(buffer));
context.Push();
context.State = State.None;
return(true);
default:
if (char.IsDigit(context.Character))
{
context.Accept();
return(true);
}
context.OnError("");
return(false);
}
}
