Function getQuery

dql/parser.go:1005–1074

getQuery creates a GraphQuery object tree by calling getRoot and goDeep functions by looking at '{'.

(it *lex.ItemIterator)

// getQuery creates a GraphQuery object tree by calling getRoot
// and goDeep functions by looking at '{'.
func getQuery(it *lex.ItemIterator) (gq *GraphQuery, rerr error) {
	// First, get the root
	gq, rerr = getRoot(it)
	if rerr != nil {
		return nil, rerr
	}

	var seenFilter bool
L:
	// Recurse to deeper levels through godeep.
	if !it.Next() {
		return nil, it.Errorf("Expecting more lexer items while parsing query")
	}

	item := it.Item()
	switch item.Typ {
	case itemLeftCurl:
		if rerr = godeep(it, gq); rerr != nil {
			return nil, rerr
		}
	case itemAt:
		it.Next()
		item := it.Item()
		if item.Typ == itemName {
			switch strings.ToLower(item.Val) {
			case "filter":
				if seenFilter {
					return nil, item.Errorf("Repeated filter at root")
				}
				seenFilter = true
				filter, err := parseFilter(it)
				if err != nil {
					return nil, err
				}
				gq.Filter = filter

			case "normalize":
				gq.Normalize = true
			case "cascade":
				if err := parseCascade(it, gq); err != nil {
					return nil, err
				}
			case "groupby":
				gq.IsGroupby = true
				if err := parseGroupby(it, gq); err != nil {
					return nil, err
				}
			case "ignorereflex":
				gq.IgnoreReflex = true
			case "recurse":
				gq.Recurse = true
				if err := parseRecurseArgs(it, gq); err != nil {
					return nil, err
				}
			default:
				return nil, item.Errorf("Unknown directive [%s]", item.Val)
			}
			goto L