/*
* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, B3log Team
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.b3log.solo.repository.impl;
import org.b3log.latke.Keys;
import org.b3log.latke.repository.AbstractRepository;
import org.b3log.latke.repository.FilterOperator;
import org.b3log.latke.repository.PropertyFilter;
import org.b3log.latke.repository.Query;
import org.b3log.latke.repository.RepositoryException;
import org.b3log.latke.repository.SortDirection;
import org.b3log.latke.repository.annotation.Repository;
import org.b3log.solo.model.Link;
import org.b3log.solo.repository.LinkRepository;
import org.json.JSONArray;
import org.json.JSONObject;
/**
* Link repository.
*
* @author <a href="http://88250.b3log.org">Liang Ding</a>
* @version 1.0.0.5, Nov 10, 2011
* @since 0.3.1
*/
@Repository
public class LinkRepositoryImpl extends AbstractRepository implements LinkRepository {
/**
* Public constructor.
*/
public LinkRepositoryImpl() {
super(Link.LINK);
}
@Override
public JSONObject getByAddress(final String address) throws RepositoryException {
final Query query = new Query().setFilter(new PropertyFilter(Link.LINK_ADDRESS, FilterOperator.EQUAL, address)).setPageCount(1);
final JSONObject result = get(query);
final JSONArray array = result.optJSONArray(Keys.RESULTS);
if (0 == array.length()) {
return null;
}
return array.optJSONObject(0);
}
@Override
public int getMaxOrder() throws RepositoryException {
final Query query = new Query();
query.addSort(Link.LINK_ORDER, SortDirection.DESCENDING);
final JSONObject result = get(query);
final JSONArray array = result.optJSONArray(Keys.RESULTS);
if (0 == array.length()) {
return -1;
}
return array.optJSONObject(0).optInt(Link.LINK_ORDER);
}
@Override
public JSONObject getByOrder(final int order) throws RepositoryException {
final Query query = new Query();
query.setFilter(new PropertyFilter(Link.LINK_ORDER, FilterOperator.EQUAL, order));
final JSONObject result = get(query);
final JSONArray array = result.optJSONArray(Keys.RESULTS);
if (0 == array.length()) {
return null;
}
return array.optJSONObject(0);
}
@Override
public JSONObject getUpper(final String id) throws RepositoryException {
final JSONObject link = get(id);
if (null == link) {
return null;
}
final Query query = new Query();
query.setFilter(new PropertyFilter(Link.LINK_ORDER, FilterOperator.LESS_THAN, link.optInt(Link.LINK_ORDER))).addSort(Link.LINK_ORDER,
SortDirection.DESCENDING);
query.setCurrentPageNum(1);
query.setPageSize(1);
final JSONObject result = get(query);
final JSONArray array = result.optJSONArray(Keys.RESULTS);
if (1 != array.length()) {
return null;
}
return array.optJSONObject(0);
}
@Override
public JSONObject getUnder(final String id) throws RepositoryException {
final JSONObject link = get(id);
if (null == link) {
return null;
}
final Query query = new Query();
query.setFilter(new PropertyFilter(Link.LINK_ORDER, FilterOperator.GREATER_THAN, link.optInt(Link.LINK_ORDER))).addSort(
Link.LINK_ORDER, SortDirection.ASCENDING);
query.setCurrentPageNum(1);
query.setPageSize(1);
final JSONObject result = get(query);
final JSONArray array = result.optJSONArray(Keys.RESULTS);
if (1 != array.length()) {
return null;
}
return array.optJSONObject(0);
}
}