func newTermsWriter(owner *BlockTreeTermsWriter,
fieldInfo *FieldInfo) *TermsWriter {
owner.postingsWriter.SetField(fieldInfo)
ans := &TermsWriter{
owner: owner,
fieldInfo: fieldInfo,
lastTerm: util.NewBytesRefBuilder(),
prefixStarts: make([]int, 8),
suffixWriter: store.NewRAMOutputStreamBuffer(),
statsWriter: store.NewRAMOutputStreamBuffer(),
metaWriter: store.NewRAMOutputStreamBuffer(),
bytesWriter: store.NewRAMOutputStreamBuffer(),
}
ans.longsSize = owner.postingsWriter.SetField(fieldInfo)
ans.longs = make([]int64, ans.longsSize)
return ans
}
/*
Create a new writer. The number of items (terms or sub-blocks) per
block will aim tobe between minItermsPerBlock and maxItemsPerBlock,
though in some cases, the blocks may be smaller than the min.
*/
func NewBlockTreeTermsWriter(state *SegmentWriteState,
postingsWriter PostingsWriterBase,
minItemsInBlock, maxItemsInBlock int) (*BlockTreeTermsWriter, error) {
assert2(minItemsInBlock >= 2, "minItemsInBlock must be >= 2; got %v", minItemsInBlock)
assert2(maxItemsInBlock >= 1, "maxItemsInBlock must be >= 1; got %v", maxItemsInBlock)
assert2(minItemsInBlock <= maxItemsInBlock,
"maxItemsInBlock must be >= minItemsInBlock; got maxItemsInBlock=%v minItemsInBlock=%v",
maxItemsInBlock, minItemsInBlock)
assert2(2*(minItemsInBlock-1) <= maxItemsInBlock,
"maxItemsInBlock must be at least 2*(minItemsInBlock-1; got maxItemsInBlock=%v minItemsInBlock=%v",
maxItemsInBlock, minItemsInBlock)
ans := &BlockTreeTermsWriter{
maxDoc: state.SegmentInfo.DocCount(),
fieldInfos: state.FieldInfos,
minItemsInBlock: minItemsInBlock,
maxItemsInBlock: maxItemsInBlock,
postingsWriter: postingsWriter,
segment: state.SegmentInfo.Name,
scratchBytes: store.NewRAMOutputStreamBuffer(),
scratchIntsRef: util.NewIntsRefBuilder(),
// bytesWriter: store.NewRAMOutputStreamBuffer(),
// bytesWriter2: store.NewRAMOutputStreamBuffer(),
}
ans.spi = ans
var out, indexOut store.IndexOutput
if err := func() error {
var success = false
defer func() {
if !success {
util.CloseWhileSuppressingError(out, indexOut)
}
}()
var err error
termsFileName := util.SegmentFileName(state.SegmentInfo.Name, state.SegmentSuffix, TERMS_EXTENSION)
if out, err = state.Directory.CreateOutput(termsFileName, state.Context); err != nil {
return err
}
if err = ans.spi.WriteHeader(out); err != nil {
return err
}
termsIndexFileName := util.SegmentFileName(state.SegmentInfo.Name, state.SegmentSuffix, TERMS_INDEX_EXTENSION)
if indexOut, err = state.Directory.CreateOutput(termsIndexFileName, state.Context); err != nil {
return err
}
if err = ans.spi.WriteIndexHeader(indexOut); err != nil {
return err
}
// have consumer write its format/header
if err = postingsWriter.Init(out); err != nil {
return err
}
success = true
return nil
}(); err != nil {
return nil, err
}
ans.out = out
ans.indexOut = indexOut
return ans, nil
}