/**
* Create a link to a file. There is no need to call a session.save, the change is persistent.
*
* @param fileNode The node that represents the file. This node has to be retrieved via the normal
* user his {@link Session session}. If the userID equals {@link UserConstants.ANON_USERID} an
* AccessDeniedException will be thrown.
* @param linkPath The absolute path in JCR where the link should be placed.
* @param slingRepository The {@link SlingRepository} to use to login as an administrative.
* @return The newly created node.
* @throws AccessDeniedException When the user is anonymous.
* @throws RepositoryException Something else went wrong.
*/
public static boolean createLink(Node fileNode, String linkPath, SlingRepository slingRepository)
throws AccessDeniedException, RepositoryException {
Session session = fileNode.getSession();
String userId = session.getUserID();
if (UserConstants.ANON_USERID.equals(userId)) {
throw new AccessDeniedException();
}
boolean hasMixin =
JcrUtils.hasMixin(fileNode, REQUIRED_MIXIN) && fileNode.canAddMixin(REQUIRED_MIXIN);
// If the fileNode doesn't have the required referenceable mixin, we need to set it.
if (!hasMixin) {
// The required mixin is not on the node.
// Set it.
Session adminSession = null;
try {
adminSession = slingRepository.loginAdministrative(null);
// Grab the node via the adminSession
String path = fileNode.getPath();
Node adminFileNode = (Node) adminSession.getItem(path);
if (!hasMixin) {
adminFileNode.addMixin(REQUIRED_MIXIN);
}
if (adminSession.hasPendingChanges()) {
adminSession.save();
}
} finally {
if (adminSession != null) {
adminSession.logout();
}
}
}
// Now that the file is referenceable, it has a uuid.
// Use it for the link.
// Grab the (updated) node via the user's session id.
fileNode = (Node) session.getItem(fileNode.getPath());
// Create the link
Node linkNode = JcrUtils.deepGetOrCreateNode(session, linkPath);
if (!"sling:Folder".equals(linkNode.getPrimaryNodeType().getName())) {
// sling folder allows single and multiple properties, no need for the mixin.
if (linkNode.canAddMixin(REQUIRED_MIXIN)) {
linkNode.addMixin(REQUIRED_MIXIN);
}
}
linkNode.setProperty(JcrResourceConstants.SLING_RESOURCE_TYPE_PROPERTY, RT_SAKAI_LINK);
linkNode.setProperty(SAKAI_LINK, fileNode.getIdentifier());
// Save link.
if (session.hasPendingChanges()) {
session.save();
}
return true;
}
