@Override
@Nullable
public VirtualFileSystemEntry findRoot(
@NotNull String basePath, @NotNull NewVirtualFileSystem fs) {
if (basePath.isEmpty()) {
LOG.error("Invalid root, fs=" + fs);
return null;
}
String rootUrl = normalizeRootUrl(basePath, fs);
myRootsLock.readLock().lock();
try {
VirtualFileSystemEntry root = myRoots.get(rootUrl);
if (root != null) return root;
} finally {
myRootsLock.readLock().unlock();
}
final VirtualFileSystemEntry newRoot;
int rootId = FSRecords.findRootRecord(rootUrl);
VfsData.Segment segment = VfsData.getSegment(rootId, true);
VfsData.DirectoryData directoryData = new VfsData.DirectoryData();
if (fs instanceof ArchiveFileSystem) {
String parentPath =
basePath.substring(0, basePath.indexOf(ArchiveFileSystem.ARCHIVE_SEPARATOR));
VirtualFile parentFile = LocalFileSystem.getInstance().findFileByPath(parentPath);
if (parentFile == null) return null;
FileType type = FileTypeRegistry.getInstance().getFileTypeByFileName(parentFile.getName());
if (!(type instanceof ArchiveFileType)) return null;
newRoot = new ArchiveRoot(fs, rootId, segment, directoryData, parentFile);
} else {
newRoot = new FsRoot(fs, rootId, segment, directoryData, basePath);
}
FileAttributes attributes =
fs.getAttributes(
new StubVirtualFile() {
@NotNull
@Override
public String getPath() {
return newRoot.getPath();
}
@Nullable
@Override
public VirtualFile getParent() {
return null;
}
});
if (attributes == null || !attributes.isDirectory()) {
return null;
}
boolean mark = false;
myRootsLock.writeLock().lock();
try {
VirtualFileSystemEntry root = myRoots.get(rootUrl);
if (root != null) return root;
VfsData.initFile(rootId, segment, -1, directoryData);
mark = writeAttributesToRecord(rootId, 0, newRoot, fs, attributes);
myRoots.put(rootUrl, newRoot);
myRootsById.put(rootId, newRoot);
} finally {
myRootsLock.writeLock().unlock();
}
if (!mark && attributes.lastModified != FSRecords.getTimestamp(rootId)) {
newRoot.markDirtyRecursively();
}
LOG.assertTrue(
rootId == newRoot.getId(),
"root=" + newRoot + " expected=" + rootId + " actual=" + newRoot.getId());
return newRoot;
}
@Override
@Nullable
public VirtualFileSystemEntry findRoot(
@NotNull String basePath, @NotNull NewVirtualFileSystem fs) {
String rootUrl = normalizeRootUrl(basePath, fs);
boolean isFakeRoot = basePath.isEmpty();
VirtualFileSystemEntry root;
myRootsLock.readLock().lock();
try {
root = isFakeRoot ? mySuperRoot : myRoots.get(rootUrl);
if (root != null) return root;
} finally {
myRootsLock.readLock().unlock();
}
myRootsLock.writeLock().lock();
try {
root = isFakeRoot ? mySuperRoot : myRoots.get(rootUrl);
if (root != null) return root;
int rootId = FSRecords.findRootRecord(rootUrl);
root = myRootsById.get(rootId);
if (root != null) return root;
if (isFakeRoot) {
// fake super-root
root = new FakeRoot(fs, rootId);
} else if (fs instanceof JarFileSystem) {
// optimization: for jar roots do not store base path in the myName field, use local FS
// file's getPath()
String parentPath = basePath.substring(0, basePath.indexOf(JarFileSystem.JAR_SEPARATOR));
VirtualFile parentLocalFile = LocalFileSystem.getInstance().findFileByPath(parentPath);
if (parentLocalFile == null) return null;
// check one more time since the findFileByPath could have created the root (by reentering
// the findRoot)
root = myRoots.get(rootUrl);
if (root != null) return root;
root = myRootsById.get(rootId);
if (root != null) return root;
root = new JarRoot(fs, rootId, parentLocalFile);
} else {
root = new FsRoot(fs, rootId, basePath);
}
if (isFakeRoot) {
mySuperRoot = root;
} else {
FileAttributes attributes = fs.getAttributes(root);
if (attributes == null || !attributes.isDirectory()) {
return null;
}
final boolean newRoot = writeAttributesToRecord(rootId, 0, root, fs, attributes);
if (!newRoot && attributes.lastModified != FSRecords.getTimestamp(rootId)) {
root.markDirtyRecursively();
}
myRoots.put(rootUrl, root);
myRootsById.put(rootId, root);
if (rootId != root.getId()) throw new AssertionError();
}
return root;
} finally {
myRootsLock.writeLock().unlock();
}
}