/* Reads but does not decode the byte[] blob holding
metadata for the current terms block */
func (r *Lucene41PostingsReader) ReadTermsBlock(termsIn store.IndexInput,
fieldInfo model.FieldInfo, _termState *BlockTermState) (err error) {
termState := _termState.Self.(*intBlockTermState)
numBytes, err := asInt(termsIn.ReadVInt())
if err != nil {
return err
}
if termState.bytes == nil {
// TODO over-allocate
termState.bytes = make([]byte, numBytes)
termState.bytesReader = store.NewEmptyByteArrayDataInput()
} else if len(termState.bytes) < numBytes {
// TODO over-allocate
termState.bytes = make([]byte, numBytes)
}
err = termsIn.ReadBytes(termState.bytes)
if err != nil {
return err
}
termState.bytesReader.Reset(termState.bytes)
return nil
}
func newSegmentTermsEnum(r *FieldReader) *SegmentTermsEnum {
ans := &SegmentTermsEnum{
FieldReader: r,
stack: make([]*segmentTermsEnumFrame, 0),
scratchReader: store.NewEmptyByteArrayDataInput(),
term: newBytesRef(),
arcs: make([]*fst.Arc, 1),
fstOutputs: fst.ByteSequenceOutputsSingleton(),
}
ans.TermsEnumImpl = newTermsEnumImpl(ans)
log.Printf("BTTR.init seg=%v", r.segment)
// Used to hold seek by TermState, or cached seek
ans.staticFrame = newFrame(ans, -1)
if r.index != nil {
ans.fstReader = r.index.BytesReader()
}
// Init w/ root block; don't use index since it may
// not (and need not) have been loaded
for i, _ := range ans.arcs {
ans.arcs[i] = &fst.Arc{}
}
ans.currentFrame = ans.staticFrame
var arc *fst.Arc
if r.index != nil {
arc = r.index.FirstArc(ans.arcs[0])
// Empty string prefix must have an output in the index!
if !arc.IsFinal() {
panic("assert fail")
}
}
ans.currentFrame = ans.staticFrame
ans.validIndexPrefix = 0
log.Printf("init frame state %v", ans.currentFrame.ord)
ans.printSeekState()
// ans.computeBlockStats()
return ans
}