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All Roads Lead to ROME. ROME is a set of Atom/RSS Java utilities that make it easy to work in Java with most syndication formats. Today it accepts all flavors of RSS (0.90, 0.91, 0.92, 0.93, 0.94, 1.0 and 2.0), Atom 0.3 and Atom 1.0 feeds. Rome includes a set of parsers and generators for the various flavors of feeds, as well as converters to convert from one format to another. The parsers can give you back Java objects that are either specific for the format you want to work with, or a generic normalized SyndFeed object that lets you work on with the data without bothering about the underlying format.

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/*
 * Copyright 2004 Sun Microsystems, Inc.
 *
 * Licensed 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 com.rometools.rome.io.impl;

import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

import org.jdom2.Content;
import org.jdom2.Element;
import org.jdom2.output.XMLOutputter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.rometools.rome.feed.WireFeed;
import com.rometools.rome.feed.rss.Category;
import com.rometools.rome.feed.rss.Channel;
import com.rometools.rome.feed.rss.Cloud;
import com.rometools.rome.feed.rss.Description;
import com.rometools.rome.feed.rss.Enclosure;
import com.rometools.rome.feed.rss.Item;
import com.rometools.rome.feed.rss.Source;

public class RSS092Parser extends RSS091UserlandParser {

    private static final Logger LOG = LoggerFactory.getLogger(RSS092Parser.class);

    public RSS092Parser() {
        this("rss_0.92");
    }

    protected RSS092Parser(final String type) {
        super(type);
    }

    @Override
    protected String getRSSVersion() {
        return "0.92";
    }

    @Override
    protected WireFeed parseChannel(final Element rssRoot, final Locale locale) {

        final Channel channel = (Channel) super.parseChannel(rssRoot, locale);

        final Element eChannel = rssRoot.getChild("channel", getRSSNamespace());

        final Element eCloud = eChannel.getChild("cloud", getRSSNamespace());

        if (eCloud != null) {
            final Cloud cloud = new Cloud();

            final String domain = eCloud.getAttributeValue("domain");
            if (domain != null) {
                cloud.setDomain(domain);
            }

            // getRSSNamespace()); DONT KNOW WHY DOESN'T WORK
            final String port = eCloud.getAttributeValue("port");
            if (port != null) {
                cloud.setPort(Integer.parseInt(port.trim()));
            }

            // getRSSNamespace()); DONT KNOW WHY DOESN'T WORK
            final String path = eCloud.getAttributeValue("path");
            if (path != null) {
                cloud.setPath(path);
            }

            // getRSSNamespace()); DONT KNOW WHY DOESN'T WORK
            final String registerProcedure = eCloud.getAttributeValue("registerProcedure");
            if (registerProcedure != null) {
                cloud.setRegisterProcedure(registerProcedure);
            }

            // getRSSNamespace()); DONT KNOW WHY DOESN'T WORK
            final String protocol = eCloud.getAttributeValue("protocol");
            if (protocol != null) {
                cloud.setProtocol(protocol);
            }

            channel.setCloud(cloud);

        }
        return channel;
    }

    @Override
    protected Item parseItem(final Element rssRoot, final Element eItem, final Locale locale) {
        final Item item = super.parseItem(rssRoot, eItem, locale);

        final Element eSource = eItem.getChild("source", getRSSNamespace());
        if (eSource != null) {
            final Source source = new Source();
            // getRSSNamespace()); DONT KNOW WHY DOESN'T WORK
            final String url = eSource.getAttributeValue("url");
            source.setUrl(url);
            source.setValue(eSource.getText());
            item.setSource(source);
        }

        // 0.92 allows one enclosure occurrence, 0.93 multiple just saving to write some code.
        // getRSSNamespace()); DONT KNOW WHY DOESN'T WORK
        final List eEnclosures = eItem.getChildren("enclosure");

        if (!eEnclosures.isEmpty()) {

            final List enclosures = new ArrayList();

            for (final Element eEnclosure : eEnclosures) {

                final Enclosure enclosure = new Enclosure();
                // getRSSNamespace()); DONT KNOW WHY DOESN'T WORK
                final String url = eEnclosure.getAttributeValue("url");
                if (url != null) {
                    enclosure.setUrl(url);
                }

                // getRSSNamespace()); DONT KNOW WHY DOESN'T WORK
                final String length = eEnclosure.getAttributeValue("length");
                enclosure.setLength(NumberParser.parseLong(length, 0L));

                // getRSSNamespace()); DONT KNOW WHY DOESN'T WORK
                final String type = eEnclosure.getAttributeValue("type");
                if (type != null) {
                    enclosure.setType(type);
                }

                enclosures.add(enclosure);

            }

            item.setEnclosures(enclosures);
        }

        // getRSSNamespace()); DONT KNOW WHY DOESN'T WORK
        final List categories = eItem.getChildren("category");
        item.setCategories(parseCategories(categories));

        return item;
    }

    protected List parseCategories(final List eCats) {

        List cats = null;

        if (!eCats.isEmpty()) {

            cats = new ArrayList();
            for (final Element eCat : eCats) {

                final Category cat = new Category();

                // getRSSNamespace()); DONT KNOW WHY DOESN'T WORK
                final String domain = eCat.getAttributeValue("domain");
                if (domain != null) {
                    cat.setDomain(domain);
                }

                cat.setValue(eCat.getText());

                cats.add(cat);

            }
        }

        return cats;

    }

    @Override
    protected Description parseItemDescription(final Element rssRoot, final Element eDesc) {
        final Description desc = new Description();
        final StringBuilder sb = new StringBuilder();
        final XMLOutputter xmlOut = new XMLOutputter();
        for (final Content c : eDesc.getContent()) {
            switch (c.getCType()) {
                case Text:
                case CDATA:
                    sb.append(c.getValue());
                    break;
                case EntityRef:
                    LOG.debug("Entity: {}", c.getValue());
                    sb.append(c.getValue());
                    break;
                case Element:
                    sb.append(xmlOut.outputString((Element) c));
                    break;
                default:
                    // ignore
                    break;
            }
        }
        desc.setValue(sb.toString());
        String att = eDesc.getAttributeValue("type");
        if (att == null) {
            att = "text/html";
        }
        desc.setType(att);
        return desc;
    }

}