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

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Here is the source code for org.wso2.carbon.connector.twitter.TwitterGetDirectMessages.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.DirectMessage;
import twitter4j.Paging;
import twitter4j.Status;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.json.DataObjectFactory;

public class TwitterGetDirectMessages extends AbstractTwitterConnector {

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

    public static final String USER_ID = "userID";

    public static final String PAGE = "page";

    public static final String SCREEN_NAME = "screenName";

    public static final String SINCE_ID = "sinceId";

    public static final String COUNT = "count";

    public static final String MAX_ID = "maxId";

    @Override
    public void connect(MessageContext messageContext) throws ConnectException {
        if (log.isDebugEnabled()) {
            log.info("executing twitter get user time line");
        }

        try {
            String page = (TwitterUtils.lookupTemplateParamater(messageContext, PAGE) != null
                    && !TwitterUtils.lookupTemplateParamater(messageContext, PAGE).isEmpty())
                            ? TwitterUtils.lookupTemplateParamater(messageContext, PAGE)
                            : null;

            String count = (TwitterUtils.lookupTemplateParamater(messageContext, COUNT) != null
                    && !TwitterUtils.lookupTemplateParamater(messageContext, COUNT).isEmpty())
                            ? TwitterUtils.lookupTemplateParamater(messageContext, COUNT)
                            : null;

            String sinceID = (TwitterUtils.lookupTemplateParamater(messageContext, SINCE_ID) != null
                    && !TwitterUtils.lookupTemplateParamater(messageContext, SINCE_ID).isEmpty())
                            ? TwitterUtils.lookupTemplateParamater(messageContext, SINCE_ID)
                            : null;

            String maxID = (TwitterUtils.lookupTemplateParamater(messageContext, MAX_ID) != null
                    && !TwitterUtils.lookupTemplateParamater(messageContext, MAX_ID).isEmpty())
                            ? TwitterUtils.lookupTemplateParamater(messageContext, MAX_ID)
                            : null;

            Twitter twitter = new TwitterClientLoader(messageContext).loadApiClient();

            List<DirectMessage> results = null;
            if (page != null && !page.isEmpty()) {
                if (count == null && sinceID == null && maxID == null) {
                    results = twitter.getDirectMessages(new Paging(Long.parseLong(page)));
                } else if (count != null && sinceID == null && maxID == null) {

                    results = twitter
                            .getDirectMessages(new Paging(Integer.parseInt(page), Integer.parseInt(count)));
                } else if (count != null && sinceID != null && maxID == null) {
                    results = twitter.getDirectMessages(
                            new Paging(Integer.parseInt(page), Integer.parseInt(count), Long.parseLong(sinceID)));
                } else {
                    results = twitter.getDirectMessages(new Paging(Integer.parseInt(page), Integer.parseInt(count),
                            Long.parseLong(sinceID), Long.parseLong(maxID)));
                }
            } else if (page == null && sinceID != null) {
                results = twitter.getDirectMessages(new Paging(Integer.parseInt(sinceID)));
            } else {
                results = twitter.getDirectMessages();
            }
            OMElement element = this.performSearchMessages(results);

            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 performSearchMessages(List<DirectMessage> messages)
            throws XMLStreamException, TwitterException, JSONException, IOException {
        OMElement resultElement = AXIOMUtil.stringToOM("<jsonObject><directmessages/></jsonObject>");
        OMElement childElment = resultElement.getFirstElement();

        for (DirectMessage message : messages) {
            StringBuilder stringBuilder = new StringBuilder();
            stringBuilder.append("{ \"message\" : ");
            String json = DataObjectFactory.getRawJSON(message);
            stringBuilder.append(json);
            stringBuilder.append("} ");
            OMElement element = super.parseJsonToXml(stringBuilder.toString());
            childElment.addChild(element.getFirstOMChild());
        }

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

    }

}