Node item()

in jdwpgen/src/main/java/build/tools/jdwpgen/Parse.java [123:184]
57 lines of code
12 McCabe index (conditional complexity)

    Node item() throws IOException {
        switch (izer.nextToken()) {
            case StreamTokenizer.TT_EOF:
                error("Unexpect end-of-file");
                return null;

            case StreamTokenizer.TT_WORD: {
                String name = izer.sval;
                if (izer.nextToken() == '=') {
                    int ntok = izer.nextToken();
                    if (ntok == StreamTokenizer.TT_WORD) {
                        return new NameValueNode(name, izer.sval);
                    } else if (ntok == '\'') {
                        return new NameValueNode(name, izer.sval.charAt(0));
                    } else {
                        error("Expected value after: " + name + " =");
                        return null;
                    }
                } else {
                    izer.pushBack();
                    return new NameNode(name);
                }
            }

            case '"':
                return new CommentNode(izer.sval);

            case '(': {
                if (izer.nextToken() == StreamTokenizer.TT_WORD) {
                    String kind = izer.sval;
                    List<Node> list = new ArrayList<>();

                    while (izer.nextToken() != ')') {
                        izer.pushBack();
                        list.add(item());
                    }
                    Node proto = kindMap.get(kind);
                    if (proto == null) {
                        error("Invalid kind: " + kind);
                        return null;
                    } else {
                        try {
                            Node node = proto.getClass().newInstance();
                            node.set(kind, list, izer.lineno());
                            return node;
                        } catch (InstantiationException | IllegalAccessException exc) {
                            error(exc.toString());
                            return null;
                        }
                    }
                } else {
                    error("Expected kind identifier, got " + izer.ttype +
                          " : " + izer.sval);
                    return null;
                }
            }

            default:
                error("Unexpected character: '" + (char)izer.ttype + "'");
                return null;
        }
    }