private static ExprChainedSpec GetLibFunctionChainSpec(ASTLibModelChainElement element, IDictionary <ITree, ExprNode> astExprNodeMap)
{
var methodName = ASTConstantHelper.RemoveTicks(element.FuncName);
var parameters = ASTLibFunctionHelper.GetExprNodesLibFunc(element.Args, astExprNodeMap);
return(new ExprChainedSpec(methodName, parameters, !element.HasLeftParen));
}
private static ASTLibModel GetModel(EsperEPL2GrammarParser.LibFunctionContext ctx, CommonTokenStream tokenStream)
{
var root = ctx.libFunctionWithClass();
IList <EsperEPL2GrammarParser.LibFunctionNoClassContext> ctxElements = ctx.libFunctionNoClass();
// there are no additional methods
if (ctxElements == null || ctxElements.IsEmpty())
{
var classIdent = root.classIdentifier() == null ? null : ASTUtil.UnescapeClassIdent(root.classIdentifier());
var ele = FromRoot(root);
return(new ASTLibModel(classIdent, Collections.SingletonList(ele)));
}
// add root and chain to just a list of elements
IList <ASTLibModelChainElement> chainElements = new List <ASTLibModelChainElement>(ctxElements.Count + 1);
var rootElement = FromRoot(root);
chainElements.Add(rootElement);
foreach (var chainedCtx in ctxElements)
{
var chainedElement = new ASTLibModelChainElement(chainedCtx.funcIdentChained().GetText(), chainedCtx.libFunctionArgs(), chainedCtx.l != null);
chainElements.Add(chainedElement);
}
// determine/remove the list of chain elements, from the start and uninterrupted, that don't have parameters (no parenthesis 'l')
IList <ASTLibModelChainElement> chainElementsNoArgs = new List <ASTLibModelChainElement>(chainElements.Count);
for (int ii = 0; ii < chainElements.Count; ii++)
{
var element = chainElements[ii];
if (!element.HasLeftParen)
{
// has no parenthesis, therefore part of class identifier
chainElementsNoArgs.Add(element);
chainElements.RemoveAt(ii--);
}
else
{
// else stop here
break;
}
}
// write the class identifier including the no-arg chain elements
var classIdentBuf = new StringBuilder();
var delimiter = "";
if (root.classIdentifier() != null)
{
classIdentBuf.Append(ASTUtil.UnescapeClassIdent(root.classIdentifier()));
delimiter = ".";
}
foreach (var noarg in chainElementsNoArgs)
{
classIdentBuf.Append(delimiter);
classIdentBuf.Append(noarg.FuncName);
delimiter = ".";
}
if (chainElements.IsEmpty())
{
// would this be an event property, but then that is handled greedily by parser
throw ASTWalkException.From("Encountered unrecognized lib function call", tokenStream, ctx);
}
// class ident can be null if empty
var classIdentifierString = classIdentBuf.ToString();
var classIdentifier = classIdentifierString.Length > 0 ? classIdentifierString : null;
return(new ASTLibModel(classIdentifier, chainElements));
}
