private static Object generalize()

in dubbo-common/src/main/java/org/apache/dubbo/common/utils/PojoUtils.java [140:243]
97 lines of code
30 McCabe index (conditional complexity)

    private static Object generalize(Object pojo, Map<Object, Object> history) {
        if (pojo == null) {
            return null;
        }

        if (pojo instanceof Enum<?>) {
            return ((Enum<?>) pojo).name();
        }
        if (pojo.getClass().isArray()
                && Enum.class.isAssignableFrom(pojo.getClass().getComponentType())) {
            int len = Array.getLength(pojo);
            String[] values = new String[len];
            for (int i = 0; i < len; i++) {
                values[i] = ((Enum<?>) Array.get(pojo, i)).name();
            }
            return values;
        }

        if (ReflectUtils.isPrimitives(pojo.getClass())) {
            return pojo;
        }

        if (pojo instanceof LocalDate || pojo instanceof LocalDateTime || pojo instanceof LocalTime) {
            return pojo.toString();
        }

        if (pojo instanceof Class) {
            return ((Class) pojo).getName();
        }

        Object o = history.get(pojo);
        if (o != null) {
            return o;
        }
        history.put(pojo, pojo);

        if (pojo.getClass().isArray()) {
            int len = Array.getLength(pojo);
            Object[] dest = new Object[len];
            history.put(pojo, dest);
            for (int i = 0; i < len; i++) {
                Object obj = Array.get(pojo, i);
                dest[i] = generalize(obj, history);
            }
            return dest;
        }
        if (pojo instanceof Collection<?>) {
            Collection<Object> src = (Collection<Object>) pojo;
            int len = src.size();
            Collection<Object> dest = (pojo instanceof List<?>) ? new ArrayList<>(len) : new HashSet<>(len);
            history.put(pojo, dest);
            for (Object obj : src) {
                dest.add(generalize(obj, history));
            }
            return dest;
        }
        if (pojo instanceof Map<?, ?>) {
            Map<Object, Object> src = (Map<Object, Object>) pojo;
            Map<Object, Object> dest = createMap(src);
            history.put(pojo, dest);
            for (Map.Entry<Object, Object> obj : src.entrySet()) {
                dest.put(generalize(obj.getKey(), history), generalize(obj.getValue(), history));
            }
            return dest;
        }
        Map<String, Object> map = new HashMap<>();
        history.put(pojo, map);
        if (GENERIC_WITH_CLZ) {
            map.put("class", pojo.getClass().getName());
        }
        for (Method method : pojo.getClass().getMethods()) {
            if (ReflectUtils.isBeanPropertyReadMethod(method)) {
                ReflectUtils.makeAccessible(method);
                try {
                    map.put(
                            ReflectUtils.getPropertyNameFromBeanReadMethod(method),
                            generalize(method.invoke(pojo), history));
                } catch (Exception e) {
                    throw new RuntimeException(e.getMessage(), e);
                }
            }
        }
        // public field
        for (Field field : pojo.getClass().getFields()) {
            if (ReflectUtils.isPublicInstanceField(field)) {
                try {
                    Object fieldValue = field.get(pojo);
                    if (history.containsKey(pojo)) {
                        Object pojoGeneralizedValue = history.get(pojo);
                        if (pojoGeneralizedValue instanceof Map
                                && ((Map) pojoGeneralizedValue).containsKey(field.getName())) {
                            continue;
                        }
                    }
                    if (fieldValue != null) {
                        map.put(field.getName(), generalize(fieldValue, history));
                    }
                } catch (Exception e) {
                    throw new RuntimeException(e.getMessage(), e);
                }
            }
        }
        return map;
    }