@Override
@NotNull
public byte[] contentsToByteArray(@NotNull final VirtualFile file, boolean cacheContent)
throws IOException {
InputStream contentStream = null;
boolean reloadFromDelegate;
boolean outdated;
int fileId;
synchronized (myInputLock) {
fileId = getFileId(file);
outdated = checkFlag(fileId, MUST_RELOAD_CONTENT) || FSRecords.getLength(fileId) == -1L;
reloadFromDelegate = outdated || (contentStream = readContent(file)) == null;
}
if (reloadFromDelegate) {
final NewVirtualFileSystem delegate = getDelegate(file);
final byte[] content;
if (outdated) {
// in this case, file can have out-of-date length. so, update it first (it's needed for
// correct contentsToByteArray() work)
// see IDEA-90813 for possible bugs
FSRecords.setLength(fileId, delegate.getLength(file));
content = delegate.contentsToByteArray(file);
} else {
// a bit of optimization
content = delegate.contentsToByteArray(file);
FSRecords.setLength(fileId, content.length);
}
ApplicationEx application = (ApplicationEx) ApplicationManager.getApplication();
// we should cache every local files content
// because the local history feature is currently depends on this cache,
// perforce offline mode as well
if ((!delegate.isReadOnly()
||
// do not cache archive content unless asked
cacheContent && !application.isInternal() && !application.isUnitTestMode())
&& content.length <= PersistentFSConstants.FILE_LENGTH_TO_CACHE_THRESHOLD) {
synchronized (myInputLock) {
writeContent(file, new ByteSequence(content), delegate.isReadOnly());
setFlag(file, MUST_RELOAD_CONTENT, false);
}
}
return content;
} else {
try {
final int length = (int) file.getLength();
assert length >= 0 : file;
return FileUtil.loadBytes(contentStream, length);
} catch (IOException e) {
throw FSRecords.handleError(e);
}
}
}
private static long reloadLengthFromDelegate(
@NotNull VirtualFile file, @NotNull NewVirtualFileSystem delegate) {
final long len = delegate.getLength(file);
FSRecords.setLength(getFileId(file), len);
return len;
}