/**
* Gets links by the specified request json object.
*
* @param requestJSONObject the specified request json object, for example,
* <pre>
* {
* "paginationCurrentPageNum": 1,
* "paginationPageSize": 20,
* "paginationWindowSize": 10
* }, see {@link Pagination} for more details
* </pre>
*
* @return for example,
* <pre>
* {
* "pagination": {
* "paginationPageCount": 100,
* "paginationPageNums": [1, 2, 3, 4, 5]
* },
* "links": [{
* "oId": "",
* "linkTitle": "",
* "linkAddress": "",
* ""linkDescription": ""
* }, ....]
* }
* </pre>
*
* @throws ServiceException service exception
* @see Pagination
*/
public JSONObject getLinks(final JSONObject requestJSONObject) throws ServiceException {
final JSONObject ret = new JSONObject();
try {
final int currentPageNum = requestJSONObject.getInt(Pagination.PAGINATION_CURRENT_PAGE_NUM);
final int pageSize = requestJSONObject.getInt(Pagination.PAGINATION_PAGE_SIZE);
final int windowSize = requestJSONObject.getInt(Pagination.PAGINATION_WINDOW_SIZE);
final Query query =
new Query()
.setCurrentPageNum(currentPageNum)
.setPageSize(pageSize)
.addSort(Link.LINK_ORDER, SortDirection.ASCENDING);
final JSONObject result = linkRepository.get(query);
final int pageCount =
result.getJSONObject(Pagination.PAGINATION).getInt(Pagination.PAGINATION_PAGE_COUNT);
final JSONObject pagination = new JSONObject();
final List<Integer> pageNums =
Paginator.paginate(currentPageNum, pageSize, pageCount, windowSize);
pagination.put(Pagination.PAGINATION_PAGE_COUNT, pageCount);
pagination.put(Pagination.PAGINATION_PAGE_NUMS, pageNums);
final JSONArray links = result.getJSONArray(Keys.RESULTS);
ret.put(Pagination.PAGINATION, pagination);
ret.put(Link.LINKS, links);
return ret;
} catch (final Exception e) {
LOGGER.log(Level.ERROR, "Gets links failed", e);
throw new ServiceException(e);
}
}
/**
* Gets a link by the specified link id.
*
* @param linkId the specified link id
* @return for example,
* <pre>
* {
* "link": {
* "oId": "",
* "linkTitle": "",
* "linkAddress": "",
* "linkDescription": ""
* }
* }
* </pre>
* , returns {@code null} if not found
* @throws ServiceException service exception
*/
public JSONObject getLink(final String linkId) throws ServiceException {
final JSONObject ret = new JSONObject();
try {
final JSONObject link = linkRepository.get(linkId);
if (null == link) {
return null;
}
ret.put(Link.LINK, link);
return ret;
} catch (final Exception e) {
LOGGER.log(Level.ERROR, "Gets a link failed", e);
throw new ServiceException(e);
}
}
/**
* Tests.
*
* @throws Exception exception
*/
@Test
public void test() throws Exception {
final LinkRepository linkRepository = getLinkRepository();
final int link1Order = 1, link2Order = 2, link3Order = 3;
JSONObject link1 = new JSONObject();
link1.put(Link.LINK_TITLE, "link title");
link1.put(Link.LINK_DESCRIPTION, "link description");
link1.put(Link.LINK_ADDRESS, "link address");
link1.put(Link.LINK_ORDER, link1Order);
Transaction transaction = linkRepository.beginTransaction();
linkRepository.add(link1);
transaction.commit();
Assert.assertNull(linkRepository.getByAddress("test"));
Assert.assertNotNull(linkRepository.getByAddress("link address"));
Assert.assertNull(linkRepository.getByOrder(0));
Assert.assertNotNull(linkRepository.getByOrder(link1Order));
final JSONObject link2 = new JSONObject();
link2.put(Link.LINK_TITLE, "link title");
link2.put(Link.LINK_DESCRIPTION, "link description");
link2.put(Link.LINK_ADDRESS, "link address");
link2.put(Link.LINK_ORDER, link2Order);
transaction = linkRepository.beginTransaction();
final String link2Id = linkRepository.add(link2);
transaction.commit();
Assert.assertEquals(linkRepository.getMaxOrder(), link2Order);
JSONObject link3 = new JSONObject();
link3.put(Link.LINK_TITLE, "link title");
link3.put(Link.LINK_DESCRIPTION, "link description");
link3.put(Link.LINK_ADDRESS, "link address");
link3.put(Link.LINK_ORDER, link3Order);
transaction = linkRepository.beginTransaction();
linkRepository.add(link3);
transaction.commit();
final int total = 3;
Assert.assertEquals(linkRepository.count(), total);
link1 = linkRepository.getUpper(link2Id);
Assert.assertNotNull(link1);
Assert.assertEquals(link1.getInt(Link.LINK_ORDER), link1Order);
link3 = linkRepository.getUnder(link2Id);
Assert.assertNotNull(link3);
Assert.assertEquals(link3.getInt(Link.LINK_ORDER), link3Order);
}