org.wso2.carbon.connector.twitter.TwitterSearchPlaces.java Source code

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Here is the source code for org.wso2.carbon.connector.twitter.TwitterSearchPlaces.java

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/*
 * Copyright (c) 2005-2013, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 * 
 * WSO2 Inc. 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 org.wso2.carbon.connector.twitter;

import java.io.IOException;
import java.util.List;

import javax.xml.stream.XMLStreamException;

import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.util.AXIOMUtil;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.MessageContext;
import org.codehaus.jettison.json.JSONException;
import org.wso2.carbon.connector.core.ConnectException;

import twitter4j.GeoLocation;
import twitter4j.GeoQuery;
import twitter4j.Place;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.json.DataObjectFactory;

public class TwitterSearchPlaces extends AbstractTwitterConnector {

    private static Log log = LogFactory.getLog(TwitterSearchPlaces.class);

    public static final String SEARCH_BY_LATITUDE = "latitude";

    public static final String SEARCH_LONGITUDE = "longitude";

    public static final String SEARCH_IP = "ip";

    @Override
    public void connect(MessageContext messageContext) throws ConnectException {
        // TODO Auto-generated method stub
        if (log.isDebugEnabled()) {
            log.info("executing twitter search places");
        }
        try {
            String latitude = TwitterUtils.lookupTemplateParamater(messageContext, SEARCH_BY_LATITUDE);
            String longitude = TwitterUtils.lookupTemplateParamater(messageContext, SEARCH_LONGITUDE);
            String ip = TwitterUtils.lookupTemplateParamater(messageContext, SEARCH_IP);
            GeoQuery query = new GeoQuery(
                    new GeoLocation(Double.parseDouble(latitude), Double.parseDouble(longitude)));
            Twitter twitter = new TwitterClientLoader(messageContext).loadApiClient();
            OMElement element = this.performSearch(twitter, query);
            if (log.isDebugEnabled()) {
                log.info("executing prparing soap envolope" + element.toString());
            }
            super.preparePayload(messageContext, element);
        } catch (TwitterException te) {
            log.error("Failed to search twitter : " + te.getMessage(), te);
            TwitterUtils.storeErrorResponseStatus(messageContext, te);
        } catch (Exception te) {
            log.error("Failed to search generic: " + te.getMessage(), te);
            TwitterUtils.storeErrorResponseStatus(messageContext, te);
        }
    }

    /**
     * Performing the searching operation for the given Geo Query criteria.
     * 
     * @param twitter
     * @param query
     * @return
     * @throws XMLStreamException
     * @throws TwitterException
     * @throws JSONException
     * @throws IOException
     */
    private OMElement performSearch(Twitter twitter, GeoQuery query)
            throws XMLStreamException, TwitterException, JSONException, IOException {
        OMElement resultElement = AXIOMUtil.stringToOM("<jsonObject><places/></jsonObject>");
        OMElement childElment = resultElement.getFirstElement();

        List<Place> results = twitter.searchPlaces(query);
        if (log.isDebugEnabled()) {
            log.info("executing executing search" + query);
        }
        for (Place place : results) {
            StringBuilder stringBuilder = new StringBuilder();
            stringBuilder.append("{ \"place\" : ");
            String json = DataObjectFactory.getRawJSON(place);
            stringBuilder.append(json);
            stringBuilder.append("} ");
            OMElement element = super.parseJsonToXml(stringBuilder.toString());
            childElment.addChild(element.getFirstOMChild());
        }

        if (results.size() == 0) {
            StringBuilder stringBuilder = new StringBuilder();
            stringBuilder.append("{ \"place\" : {}");
            stringBuilder.append("} ");
            OMElement element = super.parseJsonToXml(stringBuilder.toString());
            resultElement.addChild(element);
        }
        return resultElement;

    }

}