public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
if (value is string text)
{
if (string.IsNullOrEmpty(text))
{
return(Paging.Page(1));
}
if (text == "*" || text == "0")
{
return(Paging.Disabled);
}
var match = _regex_.Match(text);
if (match.Success && match.Groups["index"].Success)
{
if (match.Groups["count"].Success)
{
var total = match.Groups["total"].Success ? long.Parse(match.Groups["total"].Value) : 0;
if (total > 0)
{
return new Paging(int.Parse(match.Groups["index"].Value), (int)total / int.Parse(match.Groups["count"].Value))
{
TotalCount = total
}
}
;
else
{
return(new Paging(int.Parse(match.Groups["index"].Value)));
}
}
return(match.Groups["size"].Success ?
Paging.Page(int.Parse(match.Groups["index"].Value), int.Parse(match.Groups["size"].Value)) :
Paging.Page(int.Parse(match.Groups["index"].Value)));
}
}
return(base.ConvertFrom(context, culture, value));
}
public bool Complete(out Collections.INamedCollection <TMember> members)
{
members = null;
if (_stack != null && _stack.Count > 0)
{
_onError?.Invoke("SyntaxError: The data schema is empty.");
return(false);
}
switch (State)
{
case State.None:
if (_members != null && _members.Count > 0)
{
members = _members;
}
return(true);
case State.Asterisk:
this.Include("*");
break;
case State.Exclude:
this.Exclude();
break;
case State.Include:
this.Include();
break;
case State.PagingCount:
if (_bufferIndex == 0)
{
_onError?.Invoke("SyntaxError: Expected pagination number in the data schema, but missing.");
return(false);
}
_current.Paging = Paging.Page(1, int.Parse(new string(_buffer, 0, _bufferIndex)));
break;
case State.PagingSize:
if (_bufferIndex == 0)
{
_onError?.Invoke("SyntaxError: Expected pagination size in the data schema, but missing.");
return(false);
}
var buffer = new string(_buffer, 0, _bufferIndex);
if (buffer != "?")
{
_current.Paging.PageSize = int.Parse(buffer);
}
break;
default:
_onError?.Invoke($"SyntaxError: The data schema expression is incorrect({State}).");
return(false);
}
members = _members;
return(true);
}
private static bool DoPagingCount(ref StateContext context)
{
string buffer;
switch (context.Character)
{
case '?':
if (context.HasBuffer())
{
context.OnError("SyntaxError: The pagination number format of the data schema is incorrect.");
return(false);
}
context.Current.Paging = null;
context.State = State.Include;
return(true);
case '*':
if (context.HasBuffer())
{
context.OnError("SyntaxError: The pagination number format of the data schema is incorrect.");
return(false);
}
context.Current.Paging = Paging.Disabled;
context.State = State.Include;
return(true);
case '/':
if (!context.TryGetBuffer(out buffer))
{
context.OnError("SyntaxError: Expected pagination number in the data schema, but missing.");
return(false);
}
context.Current.Paging = Paging.Page(int.Parse(buffer));
context.State = State.PagingSize;
return(true);
case '(':
if (!context.TryGetBuffer(out buffer))
{
context.OnError("SyntaxError: Expected pagination number in the data schema, but missing.");
return(false);
}
context.Current.Paging = Paging.Page(1, int.Parse(buffer));
context.State = State.SortingField;
return(true);
case '{':
if (!context.TryGetBuffer(out buffer))
{
context.OnError("SyntaxError: Expected pagination number in the data schema, but missing.");
return(false);
}
context.Current.Paging = Paging.Page(1, int.Parse(buffer));
context.Push();
context.State = State.None;
return(true);
default:
if (char.IsDigit(context.Character))
{
context.Accept();
return(true);
}
context.OnError($"SyntaxError: The pagination number of the data schema contains '{context.Character}' illegal character.");
return(false);
}
}
public bool Complete(out Collections.INamedCollection <TMember> members)
{
members = null;
if (_stack != null && _stack.Count > 0)
{
_onError?.Invoke("");
return(false);
}
switch (State)
{
case State.None:
if (_members != null && _members.Count > 0)
{
members = _members;
}
return(true);
case State.Asterisk:
this.Include("*");
break;
case State.Exclude:
this.Exclude();
break;
case State.Include:
this.Include();
break;
case State.PagingCount:
if (_bufferIndex == 0)
{
_onError?.Invoke("");
return(false);
}
_current.Paging = Paging.Page(1, int.Parse(new string(_buffer, 0, _bufferIndex)));
break;
case State.PagingSize:
if (_bufferIndex == 0)
{
_onError?.Invoke("");
return(false);
}
var buffer = new string(_buffer, 0, _bufferIndex);
if (buffer != "?")
{
_current.Paging.PageSize = int.Parse(buffer);
}
break;
default:
_onError?.Invoke("");
return(false);
}
members = _members;
return(true);
}
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);
}
}