/*
* 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.service;
import javax.inject.Inject;
import org.b3log.latke.Keys;
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.service.ServiceException;
import org.b3log.latke.service.annotation.Service;
import org.b3log.solo.model.Option;
import org.b3log.solo.repository.OptionRepository;
import org.json.JSONArray;
import org.json.JSONObject;
/**
* Option query service.
*
* @author <a href="http://88250.b3log.org">Liang Ding</a>
* @version 1.0.0.0, Apr 16, 2013
* @since 0.6.0
*/
@Service
public class OptionQueryService {
/**
* Option repository.
*/
@Inject
private OptionRepository optionRepository;
/**
* Gets an option with the specified option id.
*
* @param optionId the specified option id
* @return an option, returns {@code null} if not found
* @throws ServiceException service exception
*/
public JSONObject getOptionById(final String optionId) throws ServiceException {
try {
return optionRepository.get(optionId);
} catch (final RepositoryException e) {
throw new ServiceException(e);
}
}
/**
* Gets options with the specified category.
*
* <p>
* All options with the specified category will be merged into one json object as the return value.
* </p>
*
* @param category the specified category
* @return all options with the specified category, for example,
* <pre>
* {
* "${optionId}": "${optionValue}",
* ....
* }
* </pre>, returns {@code null} if not found
* @throws ServiceException service exception
*/
public JSONObject getOptions(final String category) throws ServiceException {
final Query query = new Query();
query.setFilter(new PropertyFilter(Option.OPTION_CATEGORY, FilterOperator.EQUAL, category));
try {
final JSONObject result = optionRepository.get(query);
final JSONArray options = result.getJSONArray(Keys.RESULTS);
if (0 == options.length()) {
return null;
}
final JSONObject ret = new JSONObject();
for (int i = 0; i < options.length(); i++) {
final JSONObject option = options.getJSONObject(i);
ret.put(option.getString(Keys.OBJECT_ID), option.getString(Option.OPTION_VALUE));
}
return ret;
} catch (final Exception e) {
throw new ServiceException(e);
}
}
/**
* Sets the option repository with the specified option repository.
*
* @param optionRepository the specified option repository
*/
public void setOptionRepository(final OptionRepository optionRepository) {
this.optionRepository = optionRepository;
}
}