/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 com.googlecode.mashups.services.twitter.impl;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.Namespace;
import org.jdom.input.SAXBuilder;
import com.googlecode.mashups.services.common.ServiceConstants;
import com.googlecode.mashups.services.common.ServiceParameter;
import com.googlecode.mashups.services.common.ServiceParametersUtility;
import com.googlecode.mashups.services.twitter.api.TwitterSearchResultItem;
import com.googlecode.mashups.services.twitter.api.TwitterSearchService;
public class TwitterSearchServiceImpl implements TwitterSearchService {
public static TwitterSearchService getInstance() {
return twitterSearchService;
}
@SuppressWarnings("unchecked")
public List<TwitterSearchResultItem> getSearchList(List<ServiceParameter> parameters) throws Exception {
parameters = prepareQueryParameters(parameters);
URL feedUrl = new URL(TWITTER_SEARCH_SERVICE_URL
+ "?"
+ ServiceParametersUtility.toParametersString(parameters));
SAXBuilder builder = new SAXBuilder();
Document document = builder.build(feedUrl);
Namespace namespace = Namespace.getNamespace(ServiceConstants.ATOM_FEED, ServiceConstants.ATOM_NAMESPACE_URI);
List<TwitterSearchResultItem> searchResults = new ArrayList<TwitterSearchResultItem>();
List<Element> children = document.getRootElement().getChildren(ServiceConstants.ATOM_ENTRY, namespace);;
for (Element element : children) {
String titleNotFormatted = element.getChildText(ServiceConstants.TITLE, namespace);
String title = element.getChildText(ServiceConstants.ATOM_CONTENT, namespace);
String publishedDate = element.getChildText(ServiceConstants.ATOM_PUB_DATE, namespace);
String updateDate = element.getChildText(ServiceConstants.ATOM_UPDATE_DATE, namespace);
String authorName = element.getChild(ServiceConstants.AUTHOR, namespace).getChildText(ServiceConstants.ATOM_AUTHOR_NAME, namespace);
String authorTwitterURL = element.getChild(ServiceConstants.AUTHOR, namespace).getChildText(ServiceConstants.ATOM_URI, namespace);
String authorImageURL = "";
List links = element.getChildren(ServiceConstants.LINK, namespace);
for (int i = 0; i < links.size(); ++i) {
Element linkElement = (Element) links.get(i);
if (linkElement.getAttributeValue(ServiceConstants.TYPE).contains(ServiceConstants.IMAGE)) {
authorImageURL = linkElement.getAttributeValue(ServiceConstants.HREF);
}
}
searchResults.add(new TwitterSearchResultItem(title, titleNotFormatted, authorName, authorTwitterURL, authorImageURL, publishedDate, updateDate));
}
return searchResults;
}
/*
* @param parameters
* @return
*/
private List<ServiceParameter> prepareQueryParameters(List<ServiceParameter> parameters) {
if (parameters == null) {
parameters = new ArrayList<ServiceParameter>();
}
return parameters;
}
private TwitterSearchServiceImpl() {
}
private static TwitterSearchService twitterSearchService = new TwitterSearchServiceImpl();
}