@SuppressWarnings("unchecked")
public static Object toJSON(Object javaObject, ParserConfig mapping) {
if (javaObject == null) {
return null;
}
if (javaObject instanceof JSON) {
return javaObject;
}
if (javaObject instanceof Map) {
Map<Object, Object> map = (Map<Object, Object>) javaObject;
JSONObject json = new JSONObject(map.size());
for (Map.Entry<Object, Object> entry : map.entrySet()) {
Object key = entry.getKey();
String jsonKey = TypeUtils.castToString(key);
Object jsonValue = toJSON(entry.getValue());
json.put(jsonKey, jsonValue);
}
return json;
}
if (javaObject instanceof Collection) {
Collection<Object> collection = (Collection<Object>) javaObject;
JSONArray array = new JSONArray(collection.size());
for (Object item : collection) {
Object jsonValue = toJSON(item);
array.add(jsonValue);
}
return array;
}
Class<?> clazz = javaObject.getClass();
if (clazz.isEnum()) {
return ((Enum<?>) javaObject).name();
}
if (clazz.isArray()) {
int len = Array.getLength(javaObject);
JSONArray array = new JSONArray(len);
for (int i = 0; i < len; ++i) {
Object item = Array.get(javaObject, i);
Object jsonValue = toJSON(item);
array.add(jsonValue);
}
return array;
}
if (mapping.isPrimitive(clazz)) {
return javaObject;
}
try {
List<FieldInfo> getters = TypeUtils.computeGetters(clazz, null);
JSONObject json = new JSONObject(getters.size());
for (FieldInfo field : getters) {
Object value = field.get(javaObject);
Object jsonValue = toJSON(value);
json.put(field.getName(), jsonValue);
}
return json;
} catch (IllegalAccessException e) {
throw new JSONException("toJSON error", e);
} catch (InvocationTargetException e) {
throw new JSONException("toJSON error", e);
}
}
