protected override Expression VisitMethodCall(MethodCallExpression methodCall)
{
string method = methodCall.Method.Name;
switch (method)
{
case "Contains":
{
Expression o = methodCall.Object;
string pattern = methodCall.GetArgumentValue <string>(0);
HandleRegexMethodCallExpression(o, pattern, false);
return(methodCall);
}
case "StartsWith":
{
object[] args = new object[]
{
true,
StringComparison.CurrentCultureIgnoreCase,
StringComparison.InvariantCultureIgnoreCase
};
Expression o = methodCall.Object;
string pattern = "^" + methodCall.GetArgumentValue <string>(0);
bool ignoreCase = methodCall.HasArgumentValueFromAlternatives(1, args);
HandleRegexMethodCallExpression(o, pattern, ignoreCase);
return(methodCall);
}
case "EndsWith":
{
object[] args = new object[]
{
true,
StringComparison.CurrentCultureIgnoreCase,
StringComparison.InvariantCultureIgnoreCase
};
Expression o = methodCall.Object;
string pattern = methodCall.GetArgumentValue <string>(0) + "$";
bool ignoreCase = methodCall.HasArgumentValueFromAlternatives(1, args);
HandleRegexMethodCallExpression(o, pattern, ignoreCase);
return(methodCall);
}
case "IsMatch":
{
if (methodCall.Method.DeclaringType == typeof(Regex))
{
Expression o = methodCall.Arguments[0];
string pattern = methodCall.GetArgumentValue <string>(1) + "$";
RegexOptions options = methodCall.GetArgumentValue(2, RegexOptions.None);
HandleRegexMethodCallExpression(o, pattern, options.HasFlag(RegexOptions.IgnoreCase));
return(methodCall);
}
break;
}
}
throw new NotSupportedException(methodCall.Method.ToString());
}