The DefaultElementLocatorProvider implementation offers support for the most common types of links:
links based on ID attribute values
XPointer element() scheme
The method getElementLocator determines what ElementLocator should be used. In the default implementation it checks if the link is an XPointer element() scheme otherwise it assumes it is an ID. A non-null IDTypeVerifier will always be provided if a schema is associated with the document type.
The link string argument is the "anchor" part of the of the URL which is composed from the value of the link property specified for the link element in the CSS.
public ElementLocator getElementLocator(IDTypeVerifier idVerifier, String link) { ElementLocator elementLocator = null; try { if(link.startsWith("element(")){ // xpointer element() scheme elementLocator = new XPointerElementLocator(idVerifier, link); } else { // Locate link element by ID elementLocator = new IDElementLocator(idVerifier, link); } } catch (ElementLocatorException e) { logger.warn("Exception when create element locator for link: " + link + ". Cause: " + e, e); } return elementLocator; }