if (historicalAsset.getVersionNumber() != 0) {
Entry e = factory.getAbdera().newEntry();
e.setTitle(Long.toString(historicalAsset
.getVersionNumber()));
e.setUpdated(historicalAsset.getLastModified().getTime());
Link l = factory.newLink();
l.setHref(uriInfo
.getBaseUriBuilder()
.path("packages/{packageName}/assets/{assetName}/versions/{versionNumber}")
.build(asset.getPackageName(), asset.getName(),
Long.toString(historicalAsset.getVersionNumber())).toString());