com.rometools.rome.feed.synd.impl.ConverterForRSS092 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.rss.Category;
import com.rometools.rome.feed.rss.Enclosure;
import com.rometools.rome.feed.rss.Item;
import com.rometools.rome.feed.synd.SyndCategory;
import com.rometools.rome.feed.synd.SyndCategoryImpl;
import com.rometools.rome.feed.synd.SyndEnclosure;
import com.rometools.rome.feed.synd.SyndEnclosureImpl;
import com.rometools.rome.feed.synd.SyndEntry;

/**
 */
public class ConverterForRSS092 extends ConverterForRSS091Userland {

    public ConverterForRSS092() {
        this("rss_0.92");
    }

    protected ConverterForRSS092(final String type) {
        super(type);
    }

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

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

        final List cats = item.getCategories();

        if (!cats.isEmpty()) {

            // using a set to remove duplicates and use a LinkedHashSet to try to retain the
            // document order
            final Set s = new LinkedHashSet();

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

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

            syndEntry.setCategories(new ArrayList(s)); // c
        }

        final List enclosures = item.getEnclosures();
        if (!enclosures.isEmpty()) {
            syndEntry.setEnclosures(createSyndEnclosures(enclosures));
        }

        return syndEntry;

    }

    protected List createSyndCategories(final List rssCats) {
        final List syndCats = new ArrayList();
        for (final Category rssCat : rssCats) {
            final SyndCategory sCat = new SyndCategoryImpl();
            sCat.setTaxonomyUri(rssCat.getDomain());
            sCat.setName(rssCat.getValue());
            syndCats.add(sCat);
        }
        return syndCats;
    }

    protected List createSyndEnclosures(final List enclosures) {
        final List sEnclosures = new ArrayList();
        for (final Enclosure enc : enclosures) {
            final SyndEnclosure sEnc = new SyndEnclosureImpl();
            sEnc.setUrl(enc.getUrl());
            sEnc.setType(enc.getType());
            sEnc.setLength(enc.getLength());
            sEnclosures.add(sEnc);
        }
        return sEnclosures;
    }

    @Override
    protected Item createRSSItem(final SyndEntry sEntry) {

        final Item item = super.createRSSItem(sEntry);

        final List sCats = sEntry.getCategories(); // c
        if (!sCats.isEmpty()) {
            item.setCategories(createRSSCategories(sCats));
        }

        final List sEnclosures = sEntry.getEnclosures();
        if (!sEnclosures.isEmpty()) {
            item.setEnclosures(createEnclosures(sEnclosures));
        }

        return item;

    }

    protected List createRSSCategories(final List sCats) {
        final List cats = new ArrayList();
        for (final SyndCategory sCat : sCats) {
            final Category cat = new Category();
            cat.setDomain(sCat.getTaxonomyUri());
            cat.setValue(sCat.getName());
            cats.add(cat);
        }
        return cats;
    }

    protected List createEnclosures(final List sEnclosures) {
        final List enclosures = new ArrayList();
        for (final SyndEnclosure sEnc : sEnclosures) {
            final Enclosure enc = new Enclosure();
            enc.setUrl(sEnc.getUrl());
            enc.setType(sEnc.getType());
            enc.setLength(sEnc.getLength());
            enclosures.add(enc);
        }
        return enclosures;
    }

}