to.networld.fbtosemweb.FacebookToSIOC.java Source code

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Here is the source code for to.networld.fbtosemweb.FacebookToSIOC.java

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/**
 * cas-framework - to.networld.fbtosemweb
 *
 * Copyright (C) 2011 by Networld Project
 * Written by Alex Oberhauser <oberhauseralex@networld.to>
 * All Rights Reserved
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by 
 * the Free Software Foundation, version 3 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this software.  If not, see <http://www.gnu.org/licenses/>
 */

package to.networld.fbtosemweb;

import java.io.IOException;

import org.dom4j.Element;
import org.dom4j.QName;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

/**
 * @author Alex Oberhauser
 */
public class FacebookToSIOC extends AbstractRDFExporter {
    private JSONObject object;

    public FacebookToSIOC(JSONObject _object) throws IOException, JSONException {
        super();
        this.object = _object;
        this.createSIOC();
    }

    /**
     * TODO: If a link was posted, add also the link to the SIOC block.
     * @throws IOException
     * @throws JSONException
     */
    public void createSIOC() throws IOException, JSONException {
        Element rootNode = this.rdfDocument.addElement(new QName("RDF", RDF_NS));
        rootNode.add(SIOC_NS);
        rootNode.add(DCT_NS);

        JSONArray wallEntries = this.object.getJSONArray("data");
        for (int count = 0; count < wallEntries.length(); count++) {
            JSONObject wallEntry = (JSONObject) wallEntries.get(count);
            Element siocPost = rootNode.addElement(new QName("Post", SIOC_NS)).addAttribute(
                    new QName("about", RDF_NS), "http://graph.facebook.com/" + wallEntry.getString("id"));
            siocPost.addElement(new QName("content", SIOC_NS)).setText(wallEntry.getString("message"));
            String creatorID = wallEntry.getJSONObject("from").getString("id");
            siocPost.addElement(new QName("hasCreator", SIOC_NS)).addAttribute(new QName("resource", RDF_NS),
                    "http://graph.facebook.com/" + creatorID);
            try {
                siocPost.addElement(new QName("created", SIOC_NS)).setText(wallEntry.getString("created_time"));
            } catch (JSONException e) {
            }
            try {
                siocPost.addElement(new QName("modified", SIOC_NS)).setText(wallEntry.getString("updated_time"));
            } catch (JSONException e) {
            }

            try {
                JSONArray comments = wallEntry.getJSONObject("comments").getJSONArray("data");
                for (int count1 = 0; count1 < comments.length(); count1++) {
                    JSONObject comment = comments.getJSONObject(count1);
                    Element replyNode = siocPost.addElement(new QName("has_reply", SIOC_NS));
                    Element replyPost = replyNode.addElement(new QName("Post", SIOC_NS));
                    replyPost.addAttribute(new QName("about", RDF_NS),
                            "http://graph.facebook.com/" + comment.getString("id"));
                    replyPost.addElement(new QName("content", SIOC_NS)).setText(comment.getString("message"));
                    String replierID = comment.getJSONObject("from").getString("id");
                    replyPost.addElement(new QName("hasCreator", SIOC_NS))
                            .addAttribute(new QName("resource", RDF_NS), "http://graph.facebook.com/" + replierID);
                    try {
                        replyPost.addElement(new QName("created", SIOC_NS))
                                .setText(comment.getString("created_time"));
                    } catch (JSONException e) {
                    }
                    try {
                        replyPost.addElement(new QName("modified", SIOC_NS))
                                .setText(comment.getString("updated_time"));
                    } catch (JSONException e) {
                    }
                }
            } catch (JSONException e) {
                // TODO: Log here something, at least during development.
            }
        }
    }
}