private MemberNode convertToMemberExpression(ParseTreeNode expression) {
if (expression instanceof MemberNode) return (MemberNode) expression;
if (expression instanceof CallNode) {
CallNode call = (CallNode) expression;
if (call.getSyntax() == Syntax.Braces && call.getArgList().size() == 1)
return (MemberNode) call.getArgList().get(0);
}
return null;
}
public void join(ParseTreeNode n) {
if (n == null) return;
MemberNode mExp = convertToMemberExpression(n);
if (mExp != null) n = mExp;
if (expression == null) {
expression = n;
return;
}
if (expression instanceof MemberNode) {
if (n instanceof MemberNode) {
expression = new CallNode(null, "()", Syntax.Parentheses, expression, n);
} else if (isTuple(n)) {
CallNode cN = (CallNode) n;
List<ParseTreeNode> args = new ArrayList<ParseTreeNode>();
args.add(expression);
args.addAll(cN.getArgList());
expression = new CallNode(null, "()", Syntax.Parentheses, args);
} else {
expression = new CallNode(null, "CrossJoin", Syntax.Function, expression, n);
}
} else if (isTuple(expression)) {
CallNode cExpression = (CallNode) expression;
if (n instanceof MemberNode) {
ParseTreeNode[] args = new ParseTreeNode[cExpression.getArgList().size() + 1];
cExpression.getArgList().toArray(args);
args[args.length - 1] = n;
expression = new CallNode(null, "()", Syntax.Parentheses, args);
} else if (isTuple(n)) {
int originalSize = cExpression.getArgList().size();
CallNode addNode = (CallNode) n;
int addedSize = addNode.getArgList().size();
ParseTreeNode[] args = new ParseTreeNode[originalSize + addedSize];
for (int i = 0; i < addedSize; ++i) args[originalSize + i] = addNode.getArgList().get(i);
expression = new CallNode(null, "()", Syntax.Parentheses, args);
} else {
expression = new CallNode(null, "CrossJoin", Syntax.Function, expression, n);
}
} else {
expression = new CallNode(null, "CrossJoin", Syntax.Function, expression, n);
}
}