@Override
public void endUnionExpr(boolean create) {
ArrayDeque stack = popFrame();
if (create) {
LocationPath result = new LocationPath(Scope.LOCAL, 0);
result.addToContext((LocationPath) stack.pollFirst());
result.addToContext((LocationPath) stack.pollFirst());
push(result);
} else push(stack.peek());
}
@Override
public void endPathExpr() {
Object relative = pop();
Object context = pop();
if (relative instanceof LocationPath && context instanceof LocationPath) {
((LocationPath) relative).pathExpression = true;
((LocationPath) relative).addToContext((LocationPath) context);
context = pop();
}
if (context != PATH_FLAG) throw new NotImplementedException("Path");
push(relative);
}
private Expression createFunction(String name, ArrayDeque params) throws SAXPathException {
int noOfParams = params.size();
switch (noOfParams) {
case 0:
{
LocationPath locationPath =
predicateDepth == 0 ? LocationPath.DOCUMENT_CONTEXT : LocationPath.LOCAL_CONTEXT;
Expression expr = locationPath.apply(name);
if (expr != null) return expr;
return createFunction(name, 0);
}
case 1:
{
if (name.equals("lang")) {
langInterested = true;
FunctionCall functionCall = new FunctionCall(Functions.LANGUAGE_MATCH);
functionCall.addValidMember(new Language(), 0);
functionCall.addMember(params.pollFirst(), 1);
return functionCall;
} else {
Object current = params.pollFirst();
if (current instanceof LocationPath) {
Expression expr = ((LocationPath) current).apply(name);
if (expr != null) return expr;
}
FunctionCall functionCall = (FunctionCall) createFunction(name, 1);
functionCall.addMember(current, 0);
return functionCall;
}
}
default:
FunctionCall functionCall = (FunctionCall) createFunction(name, noOfParams);
for (int i = 0; i < noOfParams; i++) functionCall.addMember(params.pollFirst(), i);
return functionCall;
}
}
