@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;
}
private static void appendIdToParentList(final int parentId, final int childId) {
int[] childrenList = FSRecords.list(parentId);
childrenList = ArrayUtil.append(childrenList, childId);
FSRecords.updateList(parentId, childrenList);
}