/*
* Copyright (c) 2009, 2010, 2011, 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 java.util.logging.Level;
import java.util.logging.Logger;
import org.b3log.latke.Keys;
import org.b3log.latke.repository.FilterOperator;
import org.b3log.latke.repository.Query;
import org.b3log.latke.repository.RepositoryException;
import org.b3log.latke.repository.gae.AbstractGAERepository;
import org.b3log.solo.model.Article;
import org.b3log.solo.model.BlogSync;
import org.b3log.solo.repository.ExternalArticleSoloArticleRepository;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
/**
* External blog article-Solo article Google App Engine repository.
*
* @author <a href="mailto:DL88250@gmail.com">Liang Ding</a>
* @version 1.0.0.4, Jan 12, 2011
*/
public final class ExternalArticleSoloArticleGAERepository
extends AbstractGAERepository
implements ExternalArticleSoloArticleRepository {
/**
* Logger.
*/
private static final Logger LOGGER =
Logger.getLogger(ExternalArticleSoloArticleGAERepository.class.
getName());
@Override
public String getName() {
return BlogSync.BLOG_SYNC_EXTERNAL_ARTICLE + "_" + Article.ARTICLE;
}
@Override
public String getSoloArticleId(final String externalArticleId,
final String externalBloggingSys)
throws RepositoryException {
final Query query = new Query();
query.addFilter(BlogSync.BLOG_SYNC_EXTERNAL_ARTICLE_ID,
FilterOperator.EQUAL,
externalArticleId);
query.addFilter(BlogSync.BLOG_SYNC_EXTERNAL_BLOGGING_SYS,
FilterOperator.EQUAL, externalBloggingSys);
final JSONObject result = get(query);
final JSONArray array = result.optJSONArray(Keys.RESULTS);
if (0 == array.length()) {
return null;
}
return array.optJSONObject(0).optString(Article.ARTICLE + "_"
+ Keys.OBJECT_ID);
}
@Override
public JSONObject getSoloArticle(final String externalArticleId,
final String externalBloggingSys)
throws RepositoryException {
final JSONObject relation =
getByExternalArticleId(externalArticleId, externalBloggingSys);
if (null == relation) {
return null;
}
try {
final JSONObject ret = relation;
final String articleId = relation.getString(Article.ARTICLE + "_"
+ Keys.OBJECT_ID);
// replace oId for article
ret.put(Keys.OBJECT_ID, articleId);
// remove relation properties
ret.remove(Article.ARTICLE + "_" + Keys.OBJECT_ID);
ret.remove(BlogSync.BLOG_SYNC_EXTERNAL_BLOGGING_SYS);
ret.remove(BlogSync.BLOG_SYNC_EXTERNAL_ARTICLE_ID);
return ret;
} catch (final JSONException e) {
throw new RepositoryException(e);
}
}
@Override
public JSONObject getByExternalArticleId(final String externalArticleId,
final String externalBloggingSys)
throws RepositoryException {
final Query query = new Query();
query.addFilter(BlogSync.BLOG_SYNC_EXTERNAL_ARTICLE_ID,
FilterOperator.EQUAL,
externalArticleId);
query.addFilter(BlogSync.BLOG_SYNC_EXTERNAL_BLOGGING_SYS,
FilterOperator.EQUAL, externalBloggingSys);
try {
final JSONObject result = get(query);
final JSONArray array = result.getJSONArray(Keys.RESULTS);
if (0 == array.length()) {
return null;
}
return array.getJSONObject(0);
} catch (final Exception e) {
LOGGER.log(Level.SEVERE, e.getMessage(), e);
return null;
}
}
@Override
public JSONObject getBySoloArticleId(final String soloArticleId,
final String externalBloggingSys)
throws RepositoryException {
final Query query = new Query();
query.addFilter(Article.ARTICLE + "_" + Keys.OBJECT_ID,
FilterOperator.EQUAL, soloArticleId);
query.addFilter(BlogSync.BLOG_SYNC_EXTERNAL_BLOGGING_SYS,
FilterOperator.EQUAL, externalBloggingSys);
try {
final JSONObject result = get(query);
final JSONArray array = result.getJSONArray(Keys.RESULTS);
if (0 == array.length()) {
return null;
}
return array.getJSONObject(0);
} catch (final Exception e) {
LOGGER.log(Level.SEVERE, e.getMessage(), e);
return null;
}
}
/**
* Gets the {@link ExternalArticleSoloArticleGAERepository} singleton.
*
* @return the singleton
*/
public static ExternalArticleSoloArticleGAERepository getInstance() {
return SingletonHolder.SINGLETON;
}
/**
* Private default constructor.
*/
private ExternalArticleSoloArticleGAERepository() {
}
/**
* Singleton holder.
*
* @author <a href="mailto:DL88250@gmail.com">Liang Ding</a>
* @version 1.0.0.0, Jan 12, 2011
*/
private static final class SingletonHolder {
/**
* Singleton.
*/
private static final ExternalArticleSoloArticleGAERepository SINGLETON =
new ExternalArticleSoloArticleGAERepository();
/**
* Private default constructor.
*/
private SingletonHolder() {
}
}
}