static Expression ToExpression(string condition)
{
var errorListener = new ErrorListener();
var input = new AntlrInputStream(condition);
var lexer = new ConditionLexer(input);
var tokens = new CommonTokenStream(lexer);
var parser = new ConditionParser(tokens);
parser.RemoveErrorListeners();
parser.AddErrorListener(errorListener);
IParseTree tree = parser.condition();
errorListener.Validate();
ParameterExpression parameter = Expression.Parameter(typeof(IMessage), "message");
var testRoute = new Route(
Guid.NewGuid().ToString(),
"true",
nameof(ConditionVisitorTest),
TelemetryMessageSource.Instance,
new HashSet <Endpoint>());
var visitor = new ConditionVisitor(parameter, errorListener, testRoute, RouteCompilerFlags.All);
Expression result = visitor.Visit(tree);
errorListener.Validate();
return(result);
}
//Открыть парсер
private static ConditionParser OpenParser(string text)
{
var reader = new StringReader(text);
var input = new AntlrInputStream(reader.ReadToEnd());
var lexer = new ConditionLexer(input);
var tokens = new CommonTokenStream(lexer);
var parser = new ConditionParser(tokens);
return(parser);
}
static IParseTree GetParseTree(Route route, ErrorListener errorListener)
{
var input = new AntlrInputStream(route.Condition);
var lexer = new ConditionLexer(input);
var tokens = new CommonTokenStream(lexer);
var parser = new ConditionParser(tokens);
parser.RemoveErrorListeners();
parser.AddErrorListener(errorListener);
return(parser.condition());
}
