/*LUCENE TO-DO Not in use
internal void PrintSeekState(PrintStream @out)
{
if (CurrentFrame == StaticFrame)
{
@out.println(" no prior seek");
}
else
{
@out.println(" prior seek state:");
int ord = 0;
bool isSeekFrame = true;
while (true)
{
Frame f = GetFrame(ord);
Debug.Assert(f != null);
BytesRef prefix = new BytesRef(Term_Renamed.Bytes, 0, f.Prefix);
if (f.NextEnt == -1)
{
@out.println(" frame " + (isSeekFrame ? "(seek)" : "(next)") + " ord=" + ord + " fp=" + f.Fp + (f.IsFloor ? (" (fpOrig=" + f.FpOrig + ")") : "") + " prefixLen=" + f.Prefix + " prefix=" + prefix + (f.NextEnt == -1 ? "" : (" (of " + f.EntCount + ")")) + " hasTerms=" + f.HasTerms + " isFloor=" + f.IsFloor + " code=" + ((f.Fp << BlockTreeTermsWriter.OUTPUT_FLAGS_NUM_BITS) + (f.HasTerms ? BlockTreeTermsWriter.OUTPUT_FLAG_HAS_TERMS:0) + (f.IsFloor ? BlockTreeTermsWriter.OUTPUT_FLAG_IS_FLOOR:0)) + " isLastInFloor=" + f.IsLastInFloor + " mdUpto=" + f.MetaDataUpto + " tbOrd=" + f.TermBlockOrd);
}
else
{
@out.println(" frame " + (isSeekFrame ? "(seek, loaded)" : "(next, loaded)") + " ord=" + ord + " fp=" + f.Fp + (f.IsFloor ? (" (fpOrig=" + f.FpOrig + ")") : "") + " prefixLen=" + f.Prefix + " prefix=" + prefix + " nextEnt=" + f.NextEnt + (f.NextEnt == -1 ? "" : (" (of " + f.EntCount + ")")) + " hasTerms=" + f.HasTerms + " isFloor=" + f.IsFloor + " code=" + ((f.Fp << BlockTreeTermsWriter.OUTPUT_FLAGS_NUM_BITS) + (f.HasTerms ? BlockTreeTermsWriter.OUTPUT_FLAG_HAS_TERMS:0) + (f.IsFloor ? BlockTreeTermsWriter.OUTPUT_FLAG_IS_FLOOR:0)) + " lastSubFP=" + f.LastSubFP + " isLastInFloor=" + f.IsLastInFloor + " mdUpto=" + f.MetaDataUpto + " tbOrd=" + f.TermBlockOrd);
}
if (OuterInstance.Index != null)
{
Debug.Assert(!isSeekFrame || f.Arc != null, "isSeekFrame=" + isSeekFrame + " f.arc=" + f.Arc);
if (f.Prefix > 0 && isSeekFrame && f.Arc.Label != (Term_Renamed.Bytes[f.Prefix - 1] & 0xFF))
{
@out.println(" broken seek state: arc.label=" + (char) f.Arc.Label + " vs term byte=" + (char)(Term_Renamed.Bytes[f.Prefix - 1] & 0xFF));
throw new Exception("seek state is broken");
}
BytesRef output = Util.Get(OuterInstance.Index, prefix);
if (output == null)
{
@out.println(" broken seek state: prefix is not final in index");
throw new Exception("seek state is broken");
}
else if (isSeekFrame && !f.IsFloor)
{
ByteArrayDataInput reader = new ByteArrayDataInput(output.Bytes, output.Offset, output.Length);
long codeOrig = reader.ReadVLong();
long code = (f.Fp << BlockTreeTermsWriter.OUTPUT_FLAGS_NUM_BITS) | (f.HasTerms ? BlockTreeTermsWriter.OUTPUT_FLAG_HAS_TERMS:0) | (f.IsFloor ? BlockTreeTermsWriter.OUTPUT_FLAG_IS_FLOOR:0);
if (codeOrig != code)
{
@out.println(" broken seek state: output code=" + codeOrig + " doesn't match frame code=" + code);
throw new Exception("seek state is broken");
}
}
}
if (f == CurrentFrame)
{
break;
}
if (f.Prefix == ValidIndexPrefix)
{
isSeekFrame = false;
}
ord++;
}
}
}*/
/* Decodes only the term bytes of the next term. If caller then asks for
metadata, ie docFreq, totalTermFreq or pulls a D/&PEnum, we then (lazily)
decode all metadata up to the current term. */
public override BytesRef Next()
{
if (@in == null)
{
// Fresh TermsEnum; seek to first term:
FST<BytesRef>.Arc<BytesRef> arc;
if (OuterInstance.Index != null)
{
arc = OuterInstance.Index.GetFirstArc(Arcs[0]);
// Empty string prefix must have an output in the index!
Debug.Assert(arc.Final);
}
else
{
arc = null;
}
CurrentFrame = PushFrame(arc, OuterInstance.RootCode, 0);
CurrentFrame.LoadBlock();
}
TargetBeforeCurrentLength = CurrentFrame.Ord;
Debug.Assert(!Eof);
//if (DEBUG) {
//System.out.println("\nBTTR.next seg=" + segment + " term=" + brToString(term) + " termExists?=" + termExists + " field=" + fieldInfo.name + " termBlockOrd=" + currentFrame.state.termBlockOrd + " validIndexPrefix=" + validIndexPrefix);
//printSeekState();
//}
if (CurrentFrame == StaticFrame)
{
// If seek was previously called and the term was
// cached, or seek(TermState) was called, usually
// caller is just going to pull a D/&PEnum or get
// docFreq, etc. But, if they then call next(),
// this method catches up all internal state so next()
// works properly:
//if (DEBUG) System.out.println(" re-seek to pending term=" + term.utf8ToString() + " " + term);
bool result = SeekExact(Term_Renamed);
Debug.Assert(result);
}
// Pop finished blocks
while (CurrentFrame.NextEnt == CurrentFrame.EntCount)
{
if (!CurrentFrame.IsLastInFloor)
{
CurrentFrame.LoadNextFloorBlock();
}
else
{
//if (DEBUG) System.out.println(" pop frame");
if (CurrentFrame.Ord == 0)
{
//if (DEBUG) System.out.println(" return null");
Debug.Assert(SetEOF());
Term_Renamed.Length = 0;
ValidIndexPrefix = 0;
CurrentFrame.Rewind();
TermExists = false;
return null;
}
long lastFP = CurrentFrame.FpOrig;
CurrentFrame = Stack[CurrentFrame.Ord - 1];
if (CurrentFrame.NextEnt == -1 || CurrentFrame.LastSubFP != lastFP)
{
// We popped into a frame that's not loaded
// yet or not scan'd to the right entry
CurrentFrame.ScanToFloorFrame(Term_Renamed);
CurrentFrame.LoadBlock();
CurrentFrame.ScanToSubBlock(lastFP);
}
// Note that the seek state (last seek) has been
// invalidated beyond this depth
ValidIndexPrefix = Math.Min(ValidIndexPrefix, CurrentFrame.Prefix);
//if (DEBUG) {
//System.out.println(" reset validIndexPrefix=" + validIndexPrefix);
//}
}
}
while (true)
{
if (CurrentFrame.Next())
{
// Push to new block:
//if (DEBUG) System.out.println(" push frame");
CurrentFrame = PushFrame(null, CurrentFrame.LastSubFP, Term_Renamed.Length);
// this is a "next" frame -- even if it's
// floor'd we must pretend it isn't so we don't
// try to scan to the right floor frame:
CurrentFrame.IsFloor = false;
//currentFrame.hasTerms = true;
CurrentFrame.LoadBlock();
}
else
{
//if (DEBUG) System.out.println(" return term=" + term.utf8ToString() + " " + term + " currentFrame.ord=" + currentFrame.ord);
return Term_Renamed;
}
}
}