public DataNode find(Path path) {
if (path.isRoot()) {
return rootDataNode;
} else {
DataNode parent = find(path.getParent());
if (parent == null) {
return null;
} else if (parent instanceof DirectoryNode) {
DirectoryNode dirNode = (DirectoryNode) parent;
return dirNode.get(path.getName());
} else {
return null;
}
}
}
/**
* (from the spec) 7.4 Write Locks and Null Resources
*
* <p>It is possible to assert a write lock on a null resource in order to lock the name.
*
* <p>A write locked null resource, referred to as a lock-null resource, MUST respond with a 404
* (Not Found) or 405 (Method Not Allowed) to any HTTP/1.1 or DAV methods except for PUT, MKCOL,
* OPTIONS, PROPFIND, LOCK, and UNLOCK. A lock-null resource MUST appear as a member of its parent
* collection. Additionally the lock-null resource MUST have defined on it all mandatory DAV
* properties. Most of these properties, such as all the get* properties, will have no value as a
* lock-null resource does not support the GET method. Lock-Null resources MUST have defined
* values for lockdiscovery and supportedlock properties.
*
* <p>Until a method such as PUT or MKCOL is successfully executed on the lock-null resource the
* resource MUST stay in the lock-null state. However, once a PUT or MKCOL is successfully
* executed on a lock-null resource the resource ceases to be in the lock-null state.
*
* <p>If the resource is unlocked, for any reason, without a PUT, MKCOL, or similar method having
* been successfully executed upon it then the resource MUST return to the null state.
*
* @param manager
* @param request
* @param response
* @param host
* @param url
*/
private void processNonExistingResource(
HttpManager manager, Request request, Response response, String host, String url)
throws NotAuthorizedException, BadRequestException {
String name;
Path parentPath = Path.path(url);
name = parentPath.getName();
parentPath = parentPath.getParent();
url = parentPath.toString();
Resource r = manager.getResourceFactory().getResource(host, url);
if (r != null) {
if (!handlerHelper.checkAuthorisation(manager, r, request)) {
responseHandler.respondUnauthorised(r, response, request);
return;
} else {
processCreateAndLock(manager, request, response, r, name);
}
} else {
log.debug("couldnt find parent to execute lock-null, returning not found");
// respondNotFound(response,request);
response.setStatus(Status.SC_CONFLICT);
}
}
@Override
public Resource getResource(String host, String sPath)
throws NotAuthorizedException, BadRequestException {
Path p = Path.path(sPath);
if (p.getName().startsWith("alt-")) {
Resource r = wrapped.getResource(host, p.getParent().toString());
if (r instanceof FileResource) {
FileResource fr = (FileResource) r;
String sourceHash = fr.getHash();
String formatName = p.getName().replace("alt-", "");
AltFormat f = AltFormat.find(sourceHash, formatName, SessionManager.session());
FormatSpec format = altFormatGenerator.findFormat(formatName);
if (f != null) {
return new AltFormatResource((FileResource) r, p.getName(), f, format);
} else {
log.warn(
"getResource: pre-generated alt format not found: "
+ sourceHash
+ " - "
+ p.getName());
// if the format is valid then create a resource which will generate on demand
if (format != null) {
System.out.println("created resource for format: " + format);
return new AltFormatResource((FileResource) r, p.getName(), format);
} else {
log.warn("getResource: unrecognised format: " + formatName);
}
return null;
}
} else {
return null;
}
} else {
return wrapped.getResource(host, sPath);
}
}