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);
}
static void ParseJsonPath(string jsonPath, ErrorListener errorListener)
{
var input = new AntlrInputStream(jsonPath);
var lexer = new JsonPathLexer(input);
var tokens = new CommonTokenStream(lexer);
var parser = new JsonPathParser(tokens);
parser.RemoveErrorListeners();
parser.AddErrorListener(errorListener);
parser.jsonpath();
errorListener.Validate();
}
internal void ParseRoute(string routeString, out IMessageSource messageSource, out string condition, out Endpoint endpoint)
{
var errorListener = new ErrorListener();
var input = new AntlrInputStream(routeString);
var lexer = new RouteLexer(input);
var tokens = new CommonTokenStream(lexer);
var parser = new RouteParser(tokens);
parser.RemoveErrorListeners();
parser.AddErrorListener(errorListener);
IParseTree tree = parser.route();
errorListener.Validate();
var walker = new ParseTreeWalker();
var listener = new RouteParserListener(this.endpointFactory);
walker.Walk(listener, tree);
condition = listener.Condition ?? DefaultCondition;
messageSource = CustomMessageSource.Create(listener.Source);
endpoint = listener.Endpoint;
}