it.polito.tellmefirst.web.rest.interfaces.EpubChaptersInterface.java Source code

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Here is the source code for it.polito.tellmefirst.web.rest.interfaces.EpubChaptersInterface.java

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/*
 * TellMeFirst - A Knowledge Discovery Application
 *
 * Copyright (C) 2014 Giuseppe Futia, Alessio Melandri
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package it.polito.tellmefirst.web.rest.interfaces;

import it.polito.tellmefirst.classify.Classifier;
import it.polito.tellmefirst.web.rest.clients.ClientEpub;
import it.polito.tellmefirst.web.rest.exception.TMFOutputException;
import it.polito.tellmefirst.web.rest.exception.TMFVisibleException;
import it.polito.tellmefirst.web.rest.TMFServer;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.xml.sax.helpers.AttributesImpl;

import javax.xml.transform.sax.TransformerHandler;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.util.*;

public class EpubChaptersInterface extends AbsResponseInterface {
    static Log LOG = LogFactory.getLog(ClassifyInterface.class);

    public String getJSON(File file, String fileName, String url, int numTopics, String lang) throws Exception {

        LOG.debug("[getJSON] - BEGIN");

        String result;
        String xml = getXML(file, fileName, url, numTopics, lang);
        result = xml2json(xml);
        LOG.info("--------Result from Classify--------");
        LOG.info(result);

        LOG.debug("[getJSON] - END");

        return result;
    }

    public String getXML(File file, String fileName, String url, int numTopics, String lang)
            throws TMFVisibleException, TMFOutputException, IOException, InterruptedException {

        LOG.debug("[getXML] - BEGIN");
        String result;

        Classifier classifier = (lang.equals("italian")) ? TMFServer.getItalianClassifier()
                : TMFServer.getEnglishClassifier();
        ClientEpub client = new ClientEpub(classifier);
        HashMap<String, List<String[]>> chapters = client.classifyEPubChapters(file, fileName, url, numTopics,
                lang);
        result = produceXML(chapters);
        LOG.debug("[getXML] - END");

        return result;
    }

    private String produceXML(HashMap<String, List<String[]>> chapters) throws TMFOutputException {

        LOG.debug("[produceXML] - BEGIN");

        String xml;
        try {
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            TransformerHandler hd = initXMLDoc(out);
            AttributesImpl atts = new AttributesImpl();
            atts.addAttribute("", "", "service", "", "ClassifyEpubChapters");
            hd.startElement("", "", "Classification", atts);
            int i = 0;
            Set set = chapters.entrySet();
            Iterator iterator = set.iterator();
            while (iterator.hasNext()) {
                Map.Entry me = (Map.Entry) iterator.next();
                atts.clear();
                if (i == 0) {
                    hd.startElement("", "", "Chapters", atts);
                }
                atts.addAttribute("", "", "toc", "", me.getKey().toString());
                hd.startElement("", "", "Chapter", atts);
                atts.clear();
                ArrayList<String[]> topics = (ArrayList<String[]>) me.getValue();
                int j = 0;
                for (String[] topic : topics) {
                    atts.clear();
                    if (j == 0) {
                        hd.startElement("", "", "Resources", atts);
                    }
                    atts.addAttribute("", "", "uri", "", topic[0]);
                    atts.addAttribute("", "", "label", "", topic[1]);
                    atts.addAttribute("", "", "title", "", topic[2]);
                    atts.addAttribute("", "", "score", "", topic[3]);
                    atts.addAttribute("", "", "mergedTypes", "", topic[4]);
                    atts.addAttribute("", "", "image", "", topic[5]);
                    hd.startElement("", "", "Resource", atts);
                    hd.endElement("", "", "Resource");
                    j++;
                }
                if (j > 0)
                    hd.endElement("", "", "Resources");
                hd.endElement("", "", "Chapter");
                i++;
            }
            if (i > 0)
                hd.endElement("", "", "Chapters");
            hd.endElement("", "", "Classification");
            hd.endDocument();
            xml = out.toString("utf-8");
            System.out.println(xml);
        } catch (Exception e) {
            throw new TMFOutputException("Error creating XML output.", e);
        }

        LOG.debug("[produceXML] - END");

        return xml;
    }
}