private Entry createBookEntry(int id, String name) throws Exception {

    Book b = new Book();
    b.setId(id);
    b.setName(name);

    Factory factory = Abdera.getNewFactory();
    JAXBContext jc = JAXBContext.newInstance(Book.class);

    Entry e = factory.getAbdera().newEntry();
    e.setTitle(b.getName());
    e.setId(Long.toString(b.getId()));

    StringWriter writer = new StringWriter();
    jc.createMarshaller().marshal(b, writer);

    Content ct = factory.newContent(Content.Type.XML);
    ct.setValue(writer.toString());
    e.setContentElement(ct);
    return e;
  }
  /*    public static Entry ToPackageEntry(PackageItem p, UriInfo uriInfo) {
      UriBuilder base;
      if(p.isHistoricalVersion()) {
          base = uriInfo.getBaseUriBuilder().path("packages").path(p.getName()).path("versions").path(Long.toString(p.getVersionNumber()));
      } else {
          base = uriInfo.getBaseUriBuilder().path("packages").path(p.getName());
      }

      //NOTE: Entry extension is not supported in RESTEasy. We need to either use Abdera or get extension
      //supported in RESTEasy
      //PackageMetadata metadata = new PackageMetadata();
      //metadata.setUuid(p.getUUID());
      //metadata.setCreated(p.getCreatedDate().getTime());
      //metadata.setLastModified(p.getLastModified().getTime());
      //metadata.setLastContributor(p.getLastContributor());
      //c.setJAXBObject(metadata);

      Entry e =new Entry();
      e.setTitle(p.getTitle());
      e.setSummary(p.getDescription());
      e.setPublished(new Date(p.getLastModified().getTimeInMillis()));
      e.setBase(base.clone().build());

      e.setId(base.clone().build());

      Iterator<AssetItem> i = p.getAssets();
      while (i.hasNext()) {
          AssetItem item = i.next();
          Link link = new Link();
          link.setHref((base.clone().path("assets").path(item.getName())).build());
          link.setTitle(item.getTitle());
          link.setRel("asset");
          e.getLinks().add(link);
      }

      Content c = new Content();
      c.setType(MediaType.APPLICATION_OCTET_STREAM_TYPE);
      c.setSrc(base.clone().path("binary").build());
      e.setContent(c);

      return e;
  }*/
  public static Entry toAssetEntryAbdera(AssetItem a, UriInfo uriInfo) {
    URI baseURL;
    if (a.isHistoricalVersion()) {
      baseURL =
          uriInfo
              .getBaseUriBuilder()
              .path("packages/{packageName}/assets/{assetName}/versions/{version}")
              .build(a.getModuleName(), a.getName(), Long.toString(a.getVersionNumber()));
    } else {
      baseURL =
          uriInfo
              .getBaseUriBuilder()
              .path("packages/{packageName}/assets/{assetName}")
              .build(a.getModuleName(), a.getName());
    }

    Factory factory = Abdera.getNewFactory();

    org.apache.abdera.model.Entry e = factory.getAbdera().newEntry();
    e.setTitle(a.getTitle());
    e.setSummary(a.getDescription());
    e.setPublished(new Date(a.getLastModified().getTimeInMillis()));
    e.setBaseUri(baseURL.toString());
    e.addAuthor(a.getLastContributor());

    e.setId(baseURL.toString());

    // generate meta data
    ExtensibleElement extension = e.addExtension(METADATA);
    ExtensibleElement childExtension = extension.addExtension(ARCHIVED);
    // childExtension.setAttributeValue("type", ArtifactsRepository.METADATA_TYPE_STRING);
    childExtension.addSimpleExtension(VALUE, a.isArchived() ? "true" : "false");

    childExtension = extension.addExtension(UUID);
    childExtension.addSimpleExtension(VALUE, a.getUUID());

    childExtension = extension.addExtension(STATE);
    childExtension.addSimpleExtension(VALUE, a.getState() == null ? "" : a.getState().getName());

    childExtension = extension.addExtension(FORMAT);
    childExtension.addSimpleExtension(VALUE, a.getFormat());

    childExtension = extension.addExtension(VERSION_NUMBER);
    childExtension.addSimpleExtension(VALUE, String.valueOf(a.getVersionNumber()));

    childExtension = extension.addExtension(CHECKIN_COMMENT);
    childExtension.addSimpleExtension(VALUE, a.getCheckinComment());

    List<CategoryItem> categories = a.getCategories();
    childExtension = extension.addExtension(CATEGORIES);
    for (CategoryItem c : categories) {
      childExtension.addSimpleExtension(VALUE, c.getName());
    }

    org.apache.abdera.model.Content content = factory.newContent();
    content.setSrc(UriBuilder.fromUri(baseURL).path("binary").build().toString());
    content.setMimeType("application/octet-stream");
    content.setContentType(Type.MEDIA);
    e.setContentElement(content);

    return e;
  }
  public static Entry toPackageEntryAbdera(ModuleItem p, UriInfo uriInfo) {
    URI baseURL;
    if (p.isHistoricalVersion()) {
      baseURL =
          uriInfo
              .getBaseUriBuilder()
              .path("packages/{packageName}/versions/{version}")
              .build(p.getName(), Long.toString(p.getVersionNumber()));
    } else {
      baseURL = uriInfo.getBaseUriBuilder().path("packages/{packageName}").build(p.getName());
    }

    Factory factory = Abdera.getNewFactory();

    org.apache.abdera.model.Entry e = factory.getAbdera().newEntry();
    e.setTitle(p.getTitle());
    e.setSummary(p.getDescription());
    e.setPublished(new Date(p.getLastModified().getTimeInMillis()));
    e.setBaseUri(baseURL.toString());
    e.addAuthor(p.getLastContributor());

    e.setId(baseURL.toString());

    Iterator<AssetItem> i = p.getAssets();
    while (i.hasNext()) {
      AssetItem item = i.next();
      org.apache.abdera.model.Link l = factory.newLink();

      l.setHref(
          UriBuilder.fromUri(baseURL).path("assets/{assetName}").build(item.getName()).toString());
      l.setTitle(item.getTitle());
      l.setRel("asset");
      e.addLink(l);
    }

    // generate meta data
    ExtensibleElement extension = e.addExtension(METADATA);
    ExtensibleElement childExtension = extension.addExtension(ARCHIVED);
    // childExtension.setAttributeValue("type", ArtifactsRepository.METADATA_TYPE_STRING);
    childExtension.addSimpleExtension(VALUE, p.isArchived() ? "true" : "false");

    childExtension = extension.addExtension(UUID);
    childExtension.addSimpleExtension(VALUE, p.getUUID());

    childExtension = extension.addExtension(STATE);
    childExtension.addSimpleExtension(VALUE, p.getState() == null ? "" : p.getState().getName());

    childExtension = extension.addExtension(VERSION_NUMBER);
    childExtension.addSimpleExtension(VALUE, String.valueOf(p.getVersionNumber()));

    childExtension = extension.addExtension(CHECKIN_COMMENT);
    childExtension.addSimpleExtension(VALUE, p.getCheckinComment());

    org.apache.abdera.model.Content content = factory.newContent();
    content.setSrc(UriBuilder.fromUri(baseURL).path("binary").build().toString());
    content.setMimeType("application/octet-stream");
    content.setContentType(Type.MEDIA);
    e.setContentElement(content);

    return e;
  }