private static List parseParameters()

in src/main/java/org/apache/netbeans/nbpackage/ExecutionContext.java [444:524]
78 lines of code
19 McCabe index (conditional complexity)

    private static List<String> parseParameters(String s) {
        final int NULL = 0x0;
        final int IN_PARAM = 0x1;
        final int IN_DOUBLE_QUOTE = 0x2;
        final int IN_SINGLE_QUOTE = 0x3;
        ArrayList<String> params = new ArrayList<>(5);
        char c;

        int state = NULL;
        StringBuilder buff = new StringBuilder(20);
        int slength = s.length();

        for (int i = 0; i < slength; i++) {
            c = s.charAt(i);
            switch (state) {
                case NULL:
                    switch (c) {
                        case '\'':
                            state = IN_SINGLE_QUOTE;
                            break;
                        case '"':
                            state = IN_DOUBLE_QUOTE;
                            break;
                        default:
                            if (!Character.isWhitespace(c)) {
                                buff.append(c);
                                state = IN_PARAM;
                            }
                    }
                    break;
                case IN_SINGLE_QUOTE:
                    if (c != '\'') {
                        buff.append(c);
                    } else {
                        state = IN_PARAM;
                    }
                    break;
                case IN_DOUBLE_QUOTE:
                    switch (c) {
                        case '\\':
                            char peek = (i < slength - 1) ? s.charAt(i + 1) : Character.MIN_VALUE;
                            if (peek == '"' || peek == '\\') {
                                buff.append(peek);
                                i++;
                            } else {
                                buff.append(c);
                            }
                            break;
                        case '"':
                            state = IN_PARAM;
                            break;
                        default:
                            buff.append(c);
                    }
                    break;
                case IN_PARAM:
                    switch (c) {
                        case '\'':
                            state = IN_SINGLE_QUOTE;
                            break;
                        case '"':
                            state = IN_DOUBLE_QUOTE;
                            break;
                        default:
                            if (Character.isWhitespace(c)) {
                                params.add(buff.toString());
                                buff.setLength(0);
                                state = NULL;
                            } else {
                                buff.append(c);
                            }
                    }
                    break;
            }
        }
        if (buff.length() > 0) {
            params.add(buff.toString());
        }

        return List.copyOf(params);
    }