/**
* Gets the followers of a following specified by the given following id and follow type.
*
* @param followingId the given following id
* @param followingType the specified following type
* @param currentPageNum the specified current page number
* @param pageSize the specified page size
* @return result json object, for example,
* <pre>
* {
* "paginationRecordCount": int,
* "rslts": java.util.List[{
* "oId": "",
* "followerId": "",
* "followingId": "",
* "followingType": int
* }, ....]
* }
* </pre>
*
* @throws RepositoryException repository exception
*/
private JSONObject getFollowers(
final String followingId,
final int followingType,
final int currentPageNum,
final int pageSize)
throws RepositoryException {
final List<Filter> filters = new ArrayList<Filter>();
filters.add(new PropertyFilter(Follow.FOLLOWING_ID, FilterOperator.EQUAL, followingId));
filters.add(new PropertyFilter(Follow.FOLLOWING_TYPE, FilterOperator.EQUAL, followingType));
final Query query =
new Query()
.addSort(Keys.OBJECT_ID, SortDirection.DESCENDING)
.setFilter(new CompositeFilter(CompositeFilterOperator.AND, filters))
.setPageSize(pageSize)
.setCurrentPageNum(currentPageNum);
final JSONObject result = followRepository.get(query);
final List<JSONObject> records =
CollectionUtils.<JSONObject>jsonArrayToList(result.optJSONArray(Keys.RESULTS));
final int recordCnt =
result.optJSONObject(Pagination.PAGINATION).optInt(Pagination.PAGINATION_RECORD_COUNT);
final JSONObject ret = new JSONObject();
ret.put(Keys.RESULTS, (Object) records);
ret.put(Pagination.PAGINATION_RECORD_COUNT, recordCnt);
return ret;
}
/**
* Determines whether exists a follow relationship for the specified follower and the specified
* following entity.
*
* @param followerId the specified follower id
* @param followingId the specified following entity id
* @return {@code true} if exists, returns {@code false} otherwise
*/
public boolean isFollowing(final String followerId, final String followingId) {
try {
return followRepository.exists(followerId, followingId);
} catch (final RepositoryException e) {
LOGGER.log(
Level.ERROR,
"Determines following failed[followerId="
+ followerId
+ ", followingId="
+ followingId
+ ']',
e);
return false;
}
}
/**
* Gets the follower count of a following specified by the given following id and following type.
*
* @param followingId the given following id
* @param followingType the given following type
* @return count
*/
public long getFollowerCount(final String followingId, final int followingType) {
final List<Filter> filters = new ArrayList<Filter>();
filters.add(new PropertyFilter(Follow.FOLLOWING_ID, FilterOperator.EQUAL, followingId));
filters.add(new PropertyFilter(Follow.FOLLOWING_TYPE, FilterOperator.EQUAL, followingType));
final Query query =
new Query().setFilter(new CompositeFilter(CompositeFilterOperator.AND, filters));
try {
return followRepository.count(query);
} catch (final RepositoryException e) {
LOGGER.log(Level.ERROR, "Counts follower count error", e);
return 0;
}
}