private void applyChildrenChangeEvents(VirtualFile parent, List<VFileEvent> events) {
final NewVirtualFileSystem delegate = getDelegate(parent);
TIntArrayList childrenIdsUpdated = new TIntArrayList();
List<VirtualFile> childrenToBeUpdated = new SmartList<VirtualFile>();
assert parent != null && parent != mySuperRoot;
final int parentId = getFileId(parent);
assert parentId != 0;
TIntHashSet parentChildrenIds = new TIntHashSet(FSRecords.list(parentId));
boolean hasRemovedChildren = false;
for (VFileEvent event : events) {
if (event instanceof VFileCreateEvent) {
String name = ((VFileCreateEvent) event).getChildName();
final VirtualFile fake = new FakeVirtualFile(parent, name);
final FileAttributes attributes = delegate.getAttributes(fake);
if (attributes != null) {
final int childId = createAndFillRecord(delegate, fake, parentId, attributes);
assert parent instanceof VirtualDirectoryImpl : parent;
final VirtualDirectoryImpl dir = (VirtualDirectoryImpl) parent;
VirtualFileSystemEntry child = dir.createChild(name, childId, dir.getFileSystem());
childrenToBeUpdated.add(child);
childrenIdsUpdated.add(childId);
parentChildrenIds.add(childId);
}
} else if (event instanceof VFileDeleteEvent) {
VirtualFile file = ((VFileDeleteEvent) event).getFile();
if (!file.exists()) {
LOG.error("Deleting a file, which does not exist: " + file.getPath());
continue;
}
hasRemovedChildren = true;
int id = getFileId(file);
childrenToBeUpdated.add(file);
childrenIdsUpdated.add(-id);
parentChildrenIds.remove(id);
}
}
FSRecords.updateList(parentId, parentChildrenIds.toArray());
if (hasRemovedChildren) clearIdCache();
VirtualDirectoryImpl parentImpl = (VirtualDirectoryImpl) parent;
for (int i = 0, len = childrenIdsUpdated.size(); i < len; ++i) {
final int childId = childrenIdsUpdated.get(i);
final VirtualFile childFile = childrenToBeUpdated.get(i);
if (childId > 0) {
parentImpl.addChild((VirtualFileSystemEntry) childFile);
} else {
FSRecords.deleteRecordRecursively(-childId);
parentImpl.removeChild(childFile);
invalidateSubtree(childFile);
}
}
}
@Nullable
private VirtualFileSystemEntry findFileById(
int id, boolean cachedOnly, TIntArrayList visited, int mask) {
VirtualFileSystemEntry cached = myIdToDirCache.get(id);
if (cached != null) return cached;
if (visited != null
&& (visited.size() >= DEPTH_LIMIT || (mask & id) == id && visited.contains(id))) {
@NonNls
String sb =
"Dead loop detected in persistent FS (id=" + id + " cached-only=" + cachedOnly + "):";
for (int i = 0; i < visited.size(); i++) {
int _id = visited.get(i);
sb +=
"\n "
+ _id
+ " '"
+ getName(_id)
+ "' "
+ String.format("%02x", getFileAttributes(_id))
+ ' '
+ myIdToDirCache.containsKey(_id);
}
LOG.error(sb);
return null;
}
int parentId = getParent(id);
if (parentId >= id) {
if (visited == null) visited = new TIntArrayList(DEPTH_LIMIT);
}
if (visited != null) visited.add(id);
VirtualFileSystemEntry result;
if (parentId == 0) {
myRootsLock.readLock().lock();
try {
result = myRootsById.get(id);
} finally {
myRootsLock.readLock().unlock();
}
} else {
VirtualFileSystemEntry parentFile = findFileById(parentId, cachedOnly, visited, mask | id);
if (parentFile instanceof VirtualDirectoryImpl) {
result = ((VirtualDirectoryImpl) parentFile).findChildById(id, cachedOnly);
} else {
result = null;
}
}
if (result != null && result.isDirectory()) {
VirtualFileSystemEntry old = myIdToDirCache.put(id, result);
if (old != null) result = old;
}
return result;
}