public ParseNodeUses(EPLModuleParseItem item, String uses)
: base(item)
{
Uses = uses;
}
public ParseNodeImport(EPLModuleParseItem item, String imported)
: base(item)
{
Imported = imported;
}
public static ParseNode GetModule(EPLModuleParseItem item, String resourceName)
{
var input = new NoCaseSensitiveStream(item.Expression);
var lex = ParseHelper.NewLexer(input);
var tokenStream = new CommonTokenStream(lex);
tokenStream.Fill();
var tokens = tokenStream.GetTokens();
var beginIndex = 0;
var isMeta = false;
var isModule = false;
var isUses = false;
var isExpression = false;
while (beginIndex < tokens.Count)
{
var t = tokens[beginIndex];
if (t.Type == EsperEPL2GrammarParser.Eof)
{
break;
}
if ((t.Type == EsperEPL2GrammarParser.WS) ||
(t.Type == EsperEPL2GrammarParser.SL_COMMENT) ||
(t.Type == EsperEPL2GrammarParser.ML_COMMENT))
{
beginIndex++;
continue;
}
var tokenText = t.Text.Trim().ToLower();
switch (tokenText)
{
case "module":
isModule = true;
isMeta = true;
break;
case "uses":
isUses = true;
isMeta = true;
break;
case "import":
isMeta = true;
break;
default:
isExpression = true;
break;
}
beginIndex++;
beginIndex++; // skip space
break;
}
if (isExpression)
{
return(new ParseNodeExpression(item));
}
if (!isMeta)
{
return(new ParseNodeComment(item));
}
// check meta tag (module, uses, import)
var buffer = new StringWriter();
for (int i = beginIndex; i < tokens.Count; i++)
{
var t = tokens[i];
if (t.Type == EsperEPL2GrammarParser.Eof)
{
break;
}
if ((t.Type != EsperEPL2GrammarParser.IDENT) &&
(t.Type != EsperEPL2GrammarParser.DOT) &&
(t.Type != EsperEPL2GrammarParser.STAR) &&
(!t.Text.Matches("[a-zA-Z]*")))
{
throw GetMessage(isModule, isUses, resourceName, t.Type);
}
buffer.Write(t.Text.Trim());
}
String result = buffer.ToString().Trim();
if (result.Length == 0)
{
throw GetMessage(isModule, isUses, resourceName, -1);
}
if (isModule)
{
return(new ParseNodeModule(item, result));
}
else if (isUses)
{
return(new ParseNodeUses(item, result));
}
return(new ParseNodeImport(item, result));
}
public ParseNodeModule(EPLModuleParseItem item, String moduleName)
: base(item)
{
ModuleName = moduleName;
}
