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

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

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/*
 * 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 org.wso2.carbon.connector.twitter;

import java.util.List;

import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.util.AXIOMUtil;
import org.apache.synapse.MessageContext;
import org.wso2.carbon.connector.core.ConnectException;

import twitter4j.Location;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.json.DataObjectFactory;

public class TwiterGetAvailableTrends extends AbstractTwitterConnector {

    @Override
    public void connect(MessageContext messageContext) throws ConnectException {
        // TODO Auto-generated method stub
        try {
            Twitter twitter = new TwitterClientLoader(messageContext).loadApiClient();
            List<Location> locations = twitter.getAvailableTrends();
            OMElement resultElement = AXIOMUtil.stringToOM("<jsonObject><trends/></jsonObject>");
            for (Location location : locations) {
                StringBuilder stringBuilder = new StringBuilder();
                stringBuilder.append("{ \"trend\" : ");
                String json = DataObjectFactory.getRawJSON(location);
                stringBuilder.append(json);
                stringBuilder.append("} ");
                OMElement element = super.parseJsonToXml(stringBuilder.toString());
                resultElement.addChild(element);
            }

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

            super.preparePayload(messageContext, resultElement);

        } catch (TwitterException te) {
            log.error("Failed to load  available trends: " + te.getMessage(), te);
            TwitterUtils.storeErrorResponseStatus(messageContext, te);
        } catch (Exception te) {
            // TODO Auto-generated catch block
            log.error("Failed to load  available trends: " + te.getMessage(), te);
            TwitterUtils.storeErrorResponseStatus(messageContext, te);
        }

    }

}