private File extractFile(WebResource resource) {
if (resource instanceof VFSResource) {
VFSResource vResource = (VFSResource) resource;
return extractFile(vResource.getItem());
}
return null;
}
private VFSItem extractItem(WebResource resource) {
if (resource instanceof VFSResource) {
VFSResource vResource = (VFSResource) resource;
return vResource.getItem();
}
return null;
}
/**
* Check to see if a resource is currently write locked.
*
* @param path Path of the resource
* @param ifHeader "If" HTTP header which was included in the request
* @return boolean true if the resource is locked (and no appropriate lock token has been found
* for at least one of the non-shared locks which are present on the resource).
*/
public boolean isLocked(WebResource resource, String ifHeader, Identity identity) {
// Checking resource locks
String path = resource.getPath();
// check if someone else as not set a lock on the resource
if (resource instanceof VFSResource) {
VFSResource vfsResource = (VFSResource) resource;
Long lockedBy = getMetaLockedBy(vfsResource.getItem());
if (lockedBy != null && !lockedBy.equals(identity.getKey())) {
return true;
}
}
File file = extractFile(resource);
if (file == null) {
return false; // lock only file
}
LockInfo lock = fileLocks.get(file);
if (lock != null && lock.hasExpired()) {
fileLocks.remove(file);
} else if (lock != null) {
// At least one of the tokens of the locks must have been given
Iterator<String> tokenList = lock.tokens();
boolean tokenMatch = false;
while (tokenList.hasNext()) {
String token = tokenList.next();
if (ifHeader.indexOf(token) != -1) {
tokenMatch = true;
break;
}
}
if (!tokenMatch) return true;
}
// Checking inheritable collection locks
Enumeration<LockInfo> collectionLocksList = collectionLocks.elements();
while (collectionLocksList.hasMoreElements()) {
lock = collectionLocksList.nextElement();
if (lock.hasExpired()) {
collectionLocks.removeElement(lock);
} else if (path.startsWith(lock.getWebPath())) {
Iterator<String> tokenList = lock.tokens();
boolean tokenMatch = false;
while (tokenList.hasNext()) {
String token = tokenList.next();
if (ifHeader.indexOf(token) != -1) {
tokenMatch = true;
break;
}
}
if (!tokenMatch) return true;
}
}
return false;
}