Examples of com.sun.syndication.feed.atom.Link

com.sun.syndication.feed.atom.Link
Bean for link elements of Atom feeds.
@author Alejandro Abdelnur @author Dave Johnson (updated for Atom 1.0)

    static InputStream createDefaultFeedDocument(MessageBodyWorkers bodyContext,
            String uri) throws IOException {
        Feed f = new Feed();
        f.setTitle("Feed");
        
        Link selfLink = new Link();
        selfLink.setRel("self");
        selfLink.setHref(uri);
        f.getOtherLinks().add(selfLink);
        
        MessageBodyWriter<Feed> ep = bodyContext.getMessageBodyWriter(
                Feed.class, null,
                null, atomMediaType);

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        return feed;
    }


    private Link parseLink(Feed feed , Entry entry, String baseURI, Element eLink) {
        Link link = new Link();
        String att = getAttributeValue(eLink, "rel");
        if (att!=null) {
            link.setRel(att);
        }
        att = getAttributeValue(eLink, "type");
        if (att!=null) {
            link.setType(att);
        }
        att = getAttributeValue(eLink, "href");
        if (att!=null) {
            link.setHref(att);
            if (isRelativeURI(att)) {
                link.setHrefResolved(resolveURI(baseURI, eLink, att));
            } 
        }
        att = getAttributeValue(eLink, "title");
        if (att!=null) {
            link.setTitle(att);
        }
        att = getAttributeValue(eLink, "hreflang");
        if (att!=null) {
            link.setHreflang(att);
        }
        att = getAttributeValue(eLink, "length");
        if (att!=null) {
          Long val = NumberParser.parseLong(att);
          if (val != null) {
            link.setLength(val.longValue());
          }            
        }
        return link;
    }

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    // List(Elements) -> List(Link)
    private List parseAlternateLinks(Feed feed, Entry entry, String baseURI, List eLinks) {
        List links = new ArrayList();
        for (int i=0;i<eLinks.size();i++) {
            Element eLink = (Element) eLinks.get(i);
            Link link = parseLink(feed, entry, baseURI, eLink);
            if (link.getRel() == null
                    || "".equals(link.getRel().trim())
                    || "alternate".equals(link.getRel())) {
                links.add(link);
            }
        }
        return (links.size()>0) ? links : null;
    }

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    private List parseOtherLinks(Feed feed, Entry entry, String baseURI, List eLinks) {
        List links = new ArrayList();
        for (int i=0;i<eLinks.size();i++) {
            Element eLink = (Element) eLinks.get(i);
            Link link = parseLink(feed, entry, baseURI, eLink);
            if (!"alternate".equals(link.getRel())) {
                links.add(link);
            }
        }
        return (links.size()>0) ? links : null;
    }

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        }


        // use first alternate links as THE link
        if (aFeed.getAlternateLinks() != null 
                && aFeed.getAlternateLinks().size() > 0) {
            Link theLink = (Link)aFeed.getAlternateLinks().get(0);
            syndFeed.setLink(theLink.getHrefResolved());
        }
        // lump alternate and other links together
        List syndLinks = new ArrayList();
        if (aFeed.getAlternateLinks() != null 
                && aFeed.getAlternateLinks().size() > 0) {

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    }


    protected List createSyndLinks(List aLinks) {
        ArrayList sLinks = new ArrayList();
        for (Iterator iter = aLinks.iterator(); iter.hasNext();) {
            Link link = (Link)iter.next();
            SyndLink sLink = createSyndLink(link);
            sLinks.add(sLink);
        }
        return sLinks;
    }

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        }
                
        // use first alternate link as THE link
        if (entry.getAlternateLinks() != null
        && entry.getAlternateLinks().size() > 0) {
            Link theLink = (Link)entry.getAlternateLinks().get(0);
            syndEntry.setLink(theLink.getHrefResolved());
        }


        // Create synd enclosures from enclosure links
        List syndEnclosures = new ArrayList();
        if (entry.getOtherLinks() != null && entry.getOtherLinks().size() > 0) {
            List oLinks = entry.getOtherLinks();
            for (Iterator iter = oLinks.iterator(); iter.hasNext(); ) {
                Link thisLink = (Link)iter.next();
                if ("enclosure".equals(thisLink.getRel()))
                    syndEnclosures.add(
                            createSyndEnclosure(feed, entry, thisLink));
            }
        }
        syndEntry.setEnclosures(syndEnclosures);

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        syndEncl.setLength(link.getLength());
        return syndEncl;
    }
    
    public Link createAtomEnclosure(SyndEnclosure syndEnclosure) {
      Link link = new Link();
      link.setRel(     "enclosure");
      link.setType(    syndEnclosure.getType());
      link.setHref(    syndEnclosure.getUrl());
      link.setLength(  syndEnclosure.getLength());
      return link;
    }

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        syndLink.setTitle(   link.getTitle());
        return syndLink;
    }
    
    public Link createAtomLink(SyndLink syndLink) {
        Link link = new Link(); 
        link.setRel(     syndLink.getRel());
        link.setType(    syndLink.getType());
        link.setHref(    syndLink.getHref());
        link.setHreflang(syndLink.getHreflang());
        link.setLength(  syndLink.getLength());
        link.setTitle(   syndLink.getTitle());
        return link;
    }

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        List otherLinks = new ArrayList();
        List slinks = syndFeed.getLinks();
        if (slinks != null) {
            for (Iterator iter=slinks.iterator(); iter.hasNext();) {       
                SyndLink syndLink = (SyndLink)iter.next();                
                Link link = createAtomLink(syndLink);              
                if (link.getRel() == null ||
                        "".equals(link.getRel().trim()) ||
                        "alternate".equals(link.getRel())) {
                    alternateLinks.add(link);
                } else {
                    otherLinks.add(link);
                }
            }
        }
        // no alternate link? then use THE link if there is one
        if (alternateLinks.size() == 0 && syndFeed.getLink() != null) {
            Link link = new Link();
            link.setRel("alternate");
            link.setHref(syndFeed.getLink());
            alternateLinks.add(link);
        }
        if (alternateLinks.size() > 0) aFeed.setAlternateLinks(alternateLinks);
        if (otherLinks.size() > 0) aFeed.setOtherLinks(otherLinks);

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