at.ac.uniklu.mobile.sportal.mensa.MensaParser.java Source code

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Here is the source code for at.ac.uniklu.mobile.sportal.mensa.MensaParser.java

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/*
 * Copyright (c) 2014 Mario Guggenberger <mario.guggenberger@aau.at>
 *
 * This file is part of AAU Studentenportal.
 *
 * AAU Studentenportal 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, either version 3 of the License, or
 * (at your option) any later version.
 *
 * AAU Studentenportal 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 AAU Studentenportal.  If not, see <http://www.gnu.org/licenses/>.
 */

package at.ac.uniklu.mobile.sportal.mensa;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.ArrayList;

import org.apache.commons.lang.StringEscapeUtils;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

import android.util.Xml;

class MensaParser {

    @SuppressWarnings("unused")
    private static final String TAG = MensaParser.class.getSimpleName();

    Mensa parse(URL url) throws IOException, XmlPullParserException {
        InputStream in = null;
        Mensa m = null;

        try {
            in = url.openStream();

            XmlPullParser parser = Xml.newPullParser();
            parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false);
            parser.setInput(in, null);

            int type;
            while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) {
                if (type == XmlPullParser.START_TAG && parser.getName().equals("channel")) {
                    m = parseChannel(parser);
                }
            }
        } finally {
            if (in != null)
                in.close();
        }

        return m;
    }

    private Mensa parseChannel(XmlPullParser parser) throws XmlPullParserException, IOException {
        Mensa m = new Mensa();
        m.categories = new ArrayList<MenuCategory>();

        int index = 0;
        int type;
        while (!((type = parser.next()) == XmlPullParser.END_TAG && parser.getName().equals("channel"))) {
            if (type == XmlPullParser.START_TAG && parser.getName().equals("title")) {
                parser.next();
                m.name = parser.getText();
            } else if (type == XmlPullParser.START_TAG && parser.getName().equals("item")) {
                m.categories.add(parseItem(parser, index++));
            }
        }

        return m;
    }

    private MenuCategory parseItem(XmlPullParser parser, int index) throws XmlPullParserException, IOException {
        MenuCategory m = new MenuCategory();

        int type;
        while (!((type = parser.next()) == XmlPullParser.END_TAG && parser.getName().equals("item"))) {
            if (type == XmlPullParser.START_TAG && parser.getName().equals("title")) {
                parser.next();
                m.title = parser.getText();
            } else if (type == XmlPullParser.START_TAG && parser.getName().equals("link")) {
                parser.next();
                m.link = parser.getText();
            } else if (type == XmlPullParser.START_TAG && parser.getName().equals("description")) {
                parser.next();
                m.menuItems = new MenuParser().parse(StringEscapeUtils.unescapeHtml(parser.getText()), index == 0);
            }
        }

        return m;
    }
}