public static String toString()

in common/src/main/java/org/apache/seata/common/util/StringUtils.java [180:289]
89 lines of code
26 McCabe index (conditional complexity)

    public static String toString(final Object obj) {
        if (obj == null) {
            return "null";
        }

        //region Convert simple types to String directly

        if (obj instanceof CharSequence) {
            return "\"" + obj + "\"";
        }
        if (obj instanceof Character) {
            return "'" + obj + "'";
        }
        if (obj instanceof Date) {
            Date date = (Date)obj;
            long time = date.getTime();
            String dateFormat;
            if (date.getHours() == 0 && date.getMinutes() == 0 && date.getSeconds() == 0 && time % 1000 == 0) {
                dateFormat = "yyyy-MM-dd";
            } else if (time % (60 * 1000) == 0) {
                dateFormat = "yyyy-MM-dd HH:mm";
            } else if (time % 1000 == 0) {
                dateFormat = "yyyy-MM-dd HH:mm:ss";
            } else {
                dateFormat = "yyyy-MM-dd HH:mm:ss.SSS";
            }
            return new SimpleDateFormat(dateFormat).format(obj);
        }
        if (obj instanceof Enum) {
            return obj.getClass().getSimpleName() + "." + ((Enum)obj).name();
        }
        if (obj instanceof Class) {
            return ReflectionUtil.classToString((Class<?>)obj);
        }
        if (obj instanceof Field) {
            return ReflectionUtil.fieldToString((Field)obj);
        }
        if (obj instanceof Method) {
            return ReflectionUtil.methodToString((Method)obj);
        }
        if (obj instanceof Annotation) {
            return ReflectionUtil.annotationToString((Annotation)obj);
        }

        //endregion

        //region Convert the Collection and Map

        if (obj instanceof Collection) {
            return CollectionUtils.toString((Collection<?>)obj);
        }
        if (obj.getClass().isArray()) {
            return ArrayUtils.toString(obj);
        }
        if (obj instanceof Map) {
            return CollectionUtils.toString((Map<?, ?>)obj);
        }

        //endregion

        //the jdk classes
        if (obj.getClass().getClassLoader() == null) {
            return obj.toString();
        }

        return CycleDependencyHandler.wrap(obj, o -> {
            StringBuilder sb = new StringBuilder(32);

            // handle the anonymous class
            String classSimpleName;
            if (obj.getClass().isAnonymousClass()) {
                if (!obj.getClass().getSuperclass().equals(Object.class)) {
                    classSimpleName = obj.getClass().getSuperclass().getSimpleName();
                } else {
                    classSimpleName = obj.getClass().getInterfaces()[0].getSimpleName();
                }
                // Connect a '$', different from ordinary class
                classSimpleName += "$";
            } else {
                classSimpleName = obj.getClass().getSimpleName();
            }

            sb.append(classSimpleName).append("(");
            final int initialLength = sb.length();

            // Gets all fields, excluding static or synthetic fields
            Field[] fields = ReflectionUtil.getAllFields(obj.getClass());
            for (Field field : fields) {
                field.setAccessible(true);

                if (sb.length() > initialLength) {
                    sb.append(", ");
                }
                sb.append(field.getName());
                sb.append("=");
                try {
                    Object f = field.get(obj);
                    if (f == obj) {
                        sb.append("(this ").append(f.getClass().getSimpleName()).append(")");
                    } else {
                        sb.append(toString(f));
                    }
                } catch (Exception ignore) {
                }
            }

            sb.append(")");
            return sb.toString();
        });
    }