/// <summary>
/// Creates a new sorted wrapper, sorting by BytesRef
/// (ascending) then cost (ascending).
/// </summary>
public SortedTermFreqEnumeratorWrapper(ITermFreqEnumerator source, IComparer <BytesRef> comparer)
{
this.source = source;
this.comparer = comparer;
this.reader = Sort();
this.tieBreakByCostComparer = Comparer <BytesRef> .Create((left, right) =>
{
BytesRef leftScratch = new BytesRef();
BytesRef rightScratch = new BytesRef();
ByteArrayDataInput input = new ByteArrayDataInput();
// Make shallow copy in case decode changes the BytesRef:
leftScratch.Bytes = left.Bytes;
leftScratch.Offset = left.Offset;
leftScratch.Length = left.Length;
rightScratch.Bytes = right.Bytes;
rightScratch.Offset = right.Offset;
rightScratch.Length = right.Length;
long leftCost = Decode(leftScratch, input);
long rightCost = Decode(rightScratch, input);
int cmp = comparer.Compare(leftScratch, rightScratch);
if (cmp != 0)
{
return(cmp);
}
return(leftCost.CompareTo(rightCost));
});
}
/// <summary>
/// Creates a new iterator, buffering entries from the specified iterator
/// </summary>
public BufferingTermFreqEnumeratorWrapper(ITermFreqEnumerator source)
{
this.comp = source.Comparer;
int freqIndex = 0;
while (source.MoveNext())
{
m_entries.Append(source.Current);
if (freqIndex >= m_freqs.Length)
{
m_freqs = ArrayUtil.Grow(m_freqs, m_freqs.Length + 1);
}
m_freqs[freqIndex++] = source.Weight;
}
}
/// <summary>
/// Creates a new sorted wrapper, using <see cref="BytesRef.UTF8SortedAsUnicodeComparer"/>
/// for sorting.
/// </summary>
public SortedTermFreqEnumeratorWrapper(ITermFreqEnumerator source)
: this(source, BytesRef.UTF8SortedAsUnicodeComparer)
{
}
