com.rometools.rome.feed.synd.impl.ConverterForRSS094 Maven / Gradle / Ivy

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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.feed.synd.impl;

import java.util.ArrayList;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;

import com.rometools.rome.feed.WireFeed;
import com.rometools.rome.feed.module.DCModule;
import com.rometools.rome.feed.rss.Category;
import com.rometools.rome.feed.rss.Channel;
import com.rometools.rome.feed.rss.Guid;
import com.rometools.rome.feed.rss.Item;
import com.rometools.rome.feed.synd.SyndCategory;
import com.rometools.rome.feed.synd.SyndEntry;
import com.rometools.rome.feed.synd.SyndFeed;
import com.rometools.rome.feed.synd.SyndLink;
import com.rometools.rome.feed.synd.SyndLinkImpl;
import com.rometools.rome.feed.synd.SyndPerson;
import com.rometools.utils.Lists;

public class ConverterForRSS094 extends ConverterForRSS093 {

    public ConverterForRSS094() {
        this("rss_0.94");
    }

    protected ConverterForRSS094(final String type) {
        super(type);
    }

    @Override
    public void copyInto(final WireFeed feed, final SyndFeed syndFeed) {

        final Channel channel = (Channel) feed;

        super.copyInto(channel, syndFeed);

        final List cats = channel.getCategories(); // c
        if (!cats.isEmpty()) {

            // using a set to remove duplicates
            final Set s = new LinkedHashSet();

            // feed native categories (as syndcat)
            s.addAll(createSyndCategories(cats));

            // DC subjects (as syndcat)
            s.addAll(syndFeed.getCategories());

            syndFeed.setCategories(new ArrayList(s));

        }

    }

    @Override
    protected SyndEntry createSyndEntry(final Item item, final boolean preserveWireItem) {

        final SyndEntry syndEntry = super.createSyndEntry(item, preserveWireItem);

        // adding native feed author to DC creators list
        final String author = item.getAuthor();
        if (author != null) {
            final List creators = ((DCModule) syndEntry.getModule(DCModule.URI)).getCreators();
            if (!creators.contains(author)) {

                // using a set to remove duplicates
                final Set s = new LinkedHashSet();

                // DC creators
                s.addAll(creators);

                // feed native author
                s.add(author);

                creators.clear();
                creators.addAll(s);
            }
        }

        final Guid guid = item.getGuid();
        final String itemLink = item.getLink();
        if (guid != null) {
            final String guidValue = guid.getValue();
            syndEntry.setUri(guidValue);
            if (itemLink == null && guid.isPermaLink()) {
                syndEntry.setLink(guidValue);
            }
        } else {
            syndEntry.setUri(itemLink);
        }

        if (item.getComments() != null) {
            final SyndLinkImpl comments = new SyndLinkImpl();
            comments.setRel("comments");
            comments.setHref(item.getComments());
            comments.setType("text/html");
        }

        return syndEntry;

    }

    @Override
    protected WireFeed createRealFeed(final String type, final SyndFeed syndFeed) {
        final Channel channel = (Channel) super.createRealFeed(type, syndFeed);
        final List cats = syndFeed.getCategories(); // c
        if (!cats.isEmpty()) {
            channel.setCategories(createRSSCategories(cats));
        }
        return channel;
    }

    @Override
    protected Item createRSSItem(final SyndEntry sEntry) {

        final Item item = super.createRSSItem(sEntry);

        final List authors = sEntry.getAuthors();
        if (Lists.isNotEmpty(authors)) {
            final SyndPerson author = authors.get(0);
            item.setAuthor(author.getEmail());
        }

        Guid guid = null;
        final String uri = sEntry.getUri();
        final String link = sEntry.getLink();
        if (uri != null) {
            guid = new Guid();
            guid.setPermaLink(false);
            guid.setValue(uri);
        } else if (link != null) {
            guid = new Guid();
            guid.setPermaLink(true);
            guid.setValue(link);

        }
        item.setGuid(guid);

        final SyndLink comments = sEntry.findRelatedLink("comments");
        if (comments != null && (comments.getType() == null || comments.getType().endsWith("html"))) {
            item.setComments(comments.getHref());
        }
        return item;

    }

}