public void accept()

in core/src/main/java/com/alibaba/fastjson2/JSONPathSegmentName.java [447:697]
226 lines of code
91 McCabe index (conditional complexity)

    public void accept(JSONReader jsonReader, JSONPath.Context context) {
        if (context.parent != null
                && (context.parent.eval
                || context.parent.current instanceof JSONPathFilter
                || context.parent.current instanceof MultiIndexSegment)
        ) {
            eval(context);
            return;
        }

        if (jsonReader.jsonb) {
            if (jsonReader.nextIfObjectStart()) {
                for (int i = 0; ; ++i) {
                    if (jsonReader.nextIfObjectEnd()) {
                        break;
                    }

                    long nameHashCode = jsonReader.readFieldNameHashCode();
                    if (nameHashCode == 0) {
                        continue;
                    }
                    boolean match = nameHashCode == this.nameHashCode;
                    if (!match) {
                        jsonReader.skipValue();
                        continue;
                    }

                    if (jsonReader.isArray() || jsonReader.isObject()) {
                        if (context.next != null) {
                            break;
                        }
                    }

                    context.value = jsonReader.readAny();
                    context.eval = true;
                    break;
                }
                return;
            } else if (jsonReader.isArray()
                    && context.parent != null
                    && context.parent.current instanceof AllSegment) {
                List values = new JSONArray();
                int itemCnt = jsonReader.startArray();
                for (int i = 0; i < itemCnt; i++) {
                    if (jsonReader.nextIfMatch(BC_OBJECT)) {
                        for (int j = 0; ; j++) {
                            if (jsonReader.nextIfMatch(BC_OBJECT_END)) {
                                break;
                            }

                            long nameHashCode = jsonReader.readFieldNameHashCode();
                            boolean match = nameHashCode == this.nameHashCode;

                            if (!match) {
                                jsonReader.skipValue();
                                continue;
                            }

                            if (jsonReader.isArray() || jsonReader.isObject()) {
                                if (context.next != null) {
                                    break;
                                }
                            }

                            values.add(jsonReader.readAny());
                        }
                    } else {
                        jsonReader.skipValue();
                    }
                }

                context.value = values;
                context.eval = true;
                return;
            }

            throw new JSONException("TODO");
        }

        if (jsonReader.nextIfObjectStart()) {
            if (jsonReader.ch == '}') {
                jsonReader.next();
                if (jsonReader.isEnd()) {
                    return;
                }
                jsonReader.nextIfComma();
                // return object;
            }

            _for:
            for (; ; ) {
                if (jsonReader.nextIfObjectEnd()) {
                    jsonReader.next();
                    break;
                }

                long nameHashCode = jsonReader.readFieldNameHashCode();
                boolean match = nameHashCode == this.nameHashCode;

                if (!match) {
                    jsonReader.skipValue();
                    if (jsonReader.ch == ',') {
                        jsonReader.next();
                    }
                    continue;
                }

                Object val;
                switch (jsonReader.ch) {
                    case '-':
                    case '+':
                    case '0':
                    case '1':
                    case '2':
                    case '3':
                    case '4':
                    case '5':
                    case '6':
                    case '7':
                    case '8':
                    case '9':
                        jsonReader.readNumber0();
                        val = jsonReader.getNumber();
                        break;
                    case '[':
                        if (context.next != null && !(context.next instanceof EvalSegment)
                                && !(context.next instanceof JSONPathSegmentName)
                                && !(context.next instanceof AllSegment)) {
                            break _for;
                        }
                        val = jsonReader.readArray();
                        context.eval = true;
                        break;
                    case '{':
                        if (context.next != null
                                && !(context.next instanceof EvalSegment)
                                && !(context.next instanceof AllSegment)) {
                            break _for;
                        }
                        val = jsonReader.readObject();
                        context.eval = true;
                        break;
                    case '"':
                    case '\'':
                        val = jsonReader.readString();
                        break;
                    case 't':
                    case 'f':
                        val = jsonReader.readBoolValue();
                        break;
                    case 'n':
                        jsonReader.readNull();
                        val = null;
                        break;
                    default:
                        throw new JSONException("TODO : " + jsonReader.ch);
                }

                context.value = val;
                break;
            }
        } else if (jsonReader.ch == '[' && context.parent != null && context.parent.current instanceof AllSegment) {
            jsonReader.next();
            List values = new JSONArray();
            while (jsonReader.ch != EOI) {
                if (jsonReader.ch == ']') {
                    jsonReader.next();
                    break;
                }
                if (jsonReader.ch == '{') {
                    jsonReader.next();

                    _for:
                    for (; ; ) {
                        if (jsonReader.ch == '}') {
                            jsonReader.next();
                            break;
                        }

                        long nameHashCode = jsonReader.readFieldNameHashCode();
                        boolean match = nameHashCode == this.nameHashCode;

                        if (!match) {
                            jsonReader.skipValue();
                            if (jsonReader.ch == ',') {
                                jsonReader.next();
                            }
                            continue;
                        }

                        Object val;
                        switch (jsonReader.ch) {
                            case '-':
                            case '+':
                            case '0':
                            case '1':
                            case '2':
                            case '3':
                            case '4':
                            case '5':
                            case '6':
                            case '7':
                            case '8':
                            case '9':
                            case '.':
                                jsonReader.readNumber0();
                                val = jsonReader.getNumber();
                                break;
                            case '[':
                                if (context.next != null) {
                                    break _for;
                                }
                                val = jsonReader.readArray();
                                break;
                            case '{':
                                if (context.next != null) {
                                    break _for;
                                }
                                val = jsonReader.readObject();
                                break;
                            case '"':
                            case '\'':
                                val = jsonReader.readString();
                                break;
                            case 't':
                            case 'f':
                                val = jsonReader.readBoolValue();
                                break;
                            case 'n':
                                jsonReader.readNull();
                                val = null;
                                break;
                            default:
                                throw new JSONException("TODO : " + jsonReader.ch);
                        }
                        values.add(val);
                    }
                } else {
                    jsonReader.skipValue();
                }

                if (jsonReader.ch == ',') {
                    jsonReader.next();
                }
            }

            context.value = values;
        }/* else if (jsonReader.ch == JSONReader.EOI) {
            return;
        }*/
    }