private static void writeGuideReference(GuideReference reference, XmlSerializer serializer)
throws IOException {
if (reference != null) {
serializer.startTag(NAMESPACE_OPF, OPFElements.REFERENCE);
serializer.attribute(PREFIX_EMPTY, OPFAttributes.TYPE, reference.getType());
serializer.attribute(PREFIX_EMPTY, OPFAttributes.HREF, reference.getCompleteHref());
if (StringUtil.isNotBlank(reference.getTitle())) {
serializer.attribute(PREFIX_EMPTY, OPFAttributes.TITLE, reference.getTitle());
}
serializer.endTag(NAMESPACE_OPF, OPFElements.REFERENCE);
}
}
/**
* Write a resource as an item element.
*
* @param serializer the XML serialiser to write the item element to
* @param book the book to write the resource for
* @param resource the resource to write as an item element
* @throws IOException if an I/O error occurs
*/
private static void writeItem(
final XmlSerializer serializer, final Book book, final Resource resource) throws IOException {
if (!isValidResource(book, resource)) {
return;
}
serializer.startTag(NAMESPACE_OPF, OPFElements.ITEM);
serializer.attribute(PREFIX_EMPTY, OPFAttributes.ID, resource.getId());
serializer.attribute(PREFIX_EMPTY, OPFAttributes.HREF, resource.getHref());
serializer.attribute(PREFIX_EMPTY, OPFAttributes.MEDIA_TYPE, resource.getMediaType().getName());
if (StringUtil.isNotBlank(resource.getProperties())) {
serializer.attribute(PREFIX_EMPTY, OPFAttributes.PROPERTIES, resource.getProperties());
}
serializer.endTag(NAMESPACE_OPF, OPFElements.ITEM);
}