private string parseVariable()
{
var builder = new StringBuilder();
while (_reader.HasNext())
{
_reader.Next();
if (_reader.Current() == '}' && _reader.HasNext() && _reader.Forwards() == '$')
{
_reader.Next();
return(builder.ToString());
}
else
{
builder.Append(_reader.Current());
}
}
throw new ExpressionIncorrectException($"expression varible incompleted!");
}
private Dictionary <string, PropertyTemplate> parseParameter()
{
var dic = new Dictionary <string, PropertyTemplate>();
while (true)
{
var key = parseKey();
throwIfHasNoNextOrNext();
if (_reader.Current() == '@' && _reader.HasNext() && _reader.Forwards() == '{')
{
_reader.Next();
dic.Add(key, parse());
throwIfHasNoNextOrNext();
if (_reader.Current() == ']')
{
return(dic);
}
else
{
throwIfNotMatch(',', "require char ','");
}
}
else
{
_reader.Back();
var parameterNode = new PropertyTemplate();
parameterNode.Value = parseSegment(',', ']');
dic.Add(key, parameterNode);
if (_reader.Current() == ']')
{
return(dic);
}
else
{
throwIfNotMatch(',', "require char ','");
}
}
}
}
public PropertySegement[] Parse(string input)
{
_reader = new CharSequenceReader(input);
var ls = new List <PropertySegement>();
while (_reader.HasNext())
{
_reader.Next();
if (_reader.Current() == '@' && _reader.HasNext() && _reader.Forwards() == '{')
{
_reader.Next();
if (_builder.Length != 0)
{
ls.Add(new PropertySegement()
{
Value = _builder.ToString()
});
_builder.Clear();
}
var template = new PropertySegement();
template.Template = parseProperty();
ls.Add(template);
}
else if (_reader.Current() == '$' && _reader.HasNext() && _reader.Forwards() == '{')
{
_reader.Next();
if (_builder.Length != 0)
{
ls.Add(new PropertySegement()
{
Value = _builder.ToString()
});
_builder.Clear();
}
var template = new PropertySegement();
template.Value = parseVariable();
template.IsVariable = true;
ls.Add(template);
}
else
{
_builder.Append(_reader.Current());
}
}
if (_builder.Length != 0)
{
ls.Add(new PropertySegement()
{
Value = _builder.ToString()
});
}
return(ls.ToArray());
}
public static SqlTemplate Parse(string input)
{
if (input == null)
{
throw new ArgumentNullException(nameof(input));
}
var reader = new CharSequenceReader(input);
bool parsingParameter = false;
var template = new SqlTemplate();
template.RawString = input;
var ls = new List <SqlTemplateSegment>();
var segmentBuilder = new StringBuilder();
while (reader.HasNext())
{
reader.Next();
if (reader.Current() == '@' && !parsingParameter)
{
if (segmentBuilder.Length != 0)
{
ls.Add(new SqlTemplateSegment(segmentBuilder.ToString(), false));
segmentBuilder.Clear();
}
parsingParameter = true;
}
else if (parsingParameter && (reader.Current() == ' ' || reader.Current() == '\r' || reader.Current() == '\n' || reader.Current() == '\t'))
{
bool followIn = ls.Count == 0 ? false :
ls[ls.Count - 1].Value.ToLower().Trim().EndsWith(" in") ? true :
false;
ls.Add(new SqlTemplateSegment(segmentBuilder.ToString(), true, followIn));
segmentBuilder.Clear();
parsingParameter = false;
}
else
{
segmentBuilder.Append(reader.Current());
}
}
if (segmentBuilder.Length != 0)
{
if (parsingParameter)
{
bool followIn = ls.Count == 0 ? false :
ls[ls.Count - 1].Value.ToLower().Trim().EndsWith(" in") ? true :
false;
ls.Add(new SqlTemplateSegment(segmentBuilder.ToString(), true, followIn));
}
else
{
ls.Add(new SqlTemplateSegment(segmentBuilder.ToString(), false));
}
}
template.Segments = ls.ToArray();
return(template);
}
