func (w *CompoundFileWriter) writeEntryTable(entries map[string]*FileEntry,
entryOut IndexOutput) (err error) {
if err = codec.WriteHeader(entryOut, CFD_ENTRY_CODEC, CFD_VERSION_CURRENT); err == nil {
if err = entryOut.WriteVInt(int32(len(entries))); err == nil {
var names []string
for name, _ := range entries {
names = append(names, name)
}
sort.Strings(names)
for _, name := range names {
// for _, fe := range entries {
fe := entries[name]
if err = Stream(entryOut).
WriteString(util.StripSegmentName(fe.file)).
WriteLong(fe.offset).
WriteLong(fe.length).
Close(); err != nil {
break
}
}
}
}
if err == nil {
err = codec.WriteFooter(entryOut)
}
return err
}
func (d *CompoundFileDirectory) FileExists(name string) bool {
d.EnsureOpen()
// if d.writer != nil {
// return d.writer.FileExists(name)
// }
_, ok := d.entries[util.StripSegmentName(name)]
return ok
}
func (d *CompoundFileDirectory) OpenInput(name string, context IOContext) (in IndexInput, err error) {
d.Lock() // synchronized
defer d.Unlock()
d.EnsureOpen()
assert(!d.openForWrite)
id := util.StripSegmentName(name)
if entry, ok := d.entries[id]; ok {
return d.handle.Slice(name, entry.offset, entry.length)
}
keys := make([]string, 0)
for k := range d.entries {
keys = append(keys, k)
}
panic(fmt.Sprintf("No sub-file with id %v found (fileName=%v files: %v)", id, name, keys))
}
func (w *CompoundFileWriter) createOutput(name string, context IOContext) (IndexOutput, error) {
w.ensureOpen()
var success = false
var outputLocked = false
defer func() {
if !success {
delete(w.entries, name)
if outputLocked { // release the output lock if not successful
assert(w.outputTaken.Get())
w.releaseOutputLock()
}
}
}()
assert2(name != "", "name must not be empty")
_, ok := w.entries[name]
assert2(!ok, "File %v already exists", name)
entry := &FileEntry{}
entry.file = name
w.entries[name] = entry
id := util.StripSegmentName(name)
_, ok = w.seenIDs[id]
assert2(!ok, "file='%v' maps to id='%v', which was already written", name, id)
w.seenIDs[id] = true
var out *DirectCFSIndexOutput
if outputLocked := w.outputTaken.CompareAndSet(false, true); outputLocked {
o, err := w.output(context)
if err != nil {
return nil, err
}
out = newDirectCFSIndexOutput(w, o, entry, false)
} else {
entry.dir = w.directory
o, err := w.directory.CreateOutput(name, context)
if err != nil {
return nil, err
}
out = newDirectCFSIndexOutput(w, o, entry, true)
}
success = true
return out, nil
}