twitter4jads.json.JSONObjectType Maven / Gradle / Ivy
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package twitter4jads.json;
import twitter4jads.internal.logging.Logger;
import twitter4jads.internal.org.json.JSONException;
import twitter4jads.internal.org.json.JSONObject;
public final class JSONObjectType {
public enum Type {
SENDER,
STATUS,
DIRECT_MESSAGE,
DELETE,
LIMIT,
STALL_WARNING,
SCRUB_GEO,
FRIENDS,
FAVORITE,
UNFAVORITE,
FOLLOW,
UNFOLLOW,
USER_LIST_MEMBER_ADDED,
USER_LIST_MEMBER_DELETED,
USER_LIST_SUBSCRIBED,
USER_LIST_UNSUBSCRIBED,
USER_LIST_CREATED,
USER_LIST_UPDATED,
USER_LIST_DESTROYED,
USER_UPDATE,
BLOCK,
UNBLOCK,
DISCONNECTION,
UNKNOWN
}
private static final Logger logger = Logger.getLogger(JSONObjectType.class);
/**
* Determine the respective object type for a given JSONObject. This
* method inspects the object to figure out what type of object it
* represents. This is useful when processing JSON events of mixed type
* from a stream, in which case you may need to know what type of object
* to construct, or how to handle the event properly.
*
* @param json the JSONObject whose type should be determined
* @return the determined JSONObjectType, or null if not recognized
*/
public static Type determine(JSONObject json) {
// This code originally lived in AbstractStreamImplementation.
// I've moved it in here to expose it as a public encapsulation of
// the object type determination logic.
if (!json.isNull("sender")) {
return Type.SENDER;
} else if (!json.isNull("text")) {
return Type.STATUS;
} else if (!json.isNull("direct_message")) {
return Type.DIRECT_MESSAGE;
} else if (!json.isNull("delete")) {
return Type.DELETE;
} else if (!json.isNull("limit")) {
return Type.LIMIT;
} else if (!json.isNull("warning")) {
return Type.STALL_WARNING;
} else if (!json.isNull("scrub_geo")) {
return Type.SCRUB_GEO;
} else if (!json.isNull("friends")) {
return Type.FRIENDS;
} else if (!json.isNull("event")) {
String event;
try {
event = json.getString("event");
if ("favorite".equals(event)) {
return Type.FAVORITE;
} else if ("unfavorite".equals(event)) {
return Type.UNFAVORITE;
} else if ("follow".equals(event)) {
return Type.FOLLOW;
} else if ("unfollow".equals(event)) {
return Type.UNFOLLOW;
} else if (event.startsWith("list")) {
if ("list_member_added".equals(event)) {
return Type.USER_LIST_MEMBER_ADDED;
} else if ("list_member_removed".equals(event)) {
return Type.USER_LIST_MEMBER_DELETED;
} else if ("list_user_subscribed".equals(event)) {
return Type.USER_LIST_SUBSCRIBED;
} else if ("list_user_unsubscribed".equals(event)) {
return Type.USER_LIST_UNSUBSCRIBED;
} else if ("list_created".equals(event)) {
return Type.USER_LIST_CREATED;
} else if ("list_updated".equals(event)) {
return Type.USER_LIST_UPDATED;
} else if ("list_destroyed".equals(event)) {
return Type.USER_LIST_DESTROYED;
}
} else if ("user_update".equals(event)) {
return Type.USER_UPDATE;
} else if ("block".equals(event)) {
return Type.BLOCK;
} else if ("unblock".equals(event)) {
return Type.UNBLOCK;
}
} catch (JSONException jsone) {
try {
logger.warn("Failed to get event element: ", json.toString(2));
} catch (JSONException ignore) {
}
}
} else if (!json.isNull("disconnect")) {
return Type.DISCONNECTION;
}
return Type.UNKNOWN;
}
}