@Override
public int getId(
@NotNull VirtualFile parent, @NotNull String childName, @NotNull NewVirtualFileSystem fs) {
int parentId = getFileId(parent);
int[] children = FSRecords.list(parentId);
if (children.length > 0) {
// fast path, check that some child has same nameId as given name, this avoid O(N) on
// retrieving names for processing non-cached children
int nameId = FSRecords.getNameId(childName);
for (final int childId : children) {
if (nameId == FSRecords.getNameId(childId)) {
return childId;
}
}
// for case sensitive system the above check is exhaustive in consistent state of vfs
}
for (final int childId : children) {
if (namesEqual(fs, childName, FSRecords.getName(childId))) return childId;
}
final VirtualFile fake = new FakeVirtualFile(parent, childName);
final FileAttributes attributes = fs.getAttributes(fake);
if (attributes != null) {
final int child = createAndFillRecord(fs, fake, parentId, attributes);
FSRecords.updateList(parentId, ArrayUtil.append(children, child));
return child;
}
return 0;
}
@NotNull
private static String[] listPersisted(@NotNull int[] childrenIds) {
String[] names = ArrayUtil.newStringArray(childrenIds.length);
for (int i = 0; i < childrenIds.length; i++) {
names[i] = FSRecords.getName(childrenIds[i]);
}
return names;
}
private static boolean writeAttributesToRecord(
final int id,
final int parentId,
@NotNull VirtualFile file,
@NotNull NewVirtualFileSystem fs,
@NotNull FileAttributes attributes) {
String name = file.getName();
if (!name.isEmpty()) {
if (namesEqual(fs, name, FSRecords.getName(id)))
return false; // TODO: Handle root attributes change.
} else {
if (areChildrenLoaded(id)) return false; // TODO: hack
}
FSRecords.writeAttributesToRecord(id, parentId, attributes, name);
return true;
}
@Override
public String getName(int id) {
assert id > 0;
return FSRecords.getName(id);
}