/// <summary>
/// Compares the fields before checking the text of the terms.
/// </summary>
/// <param name="term">
/// the given term. </param>
/// <param name="termIndex">
/// the term that exists in the data block. </param>
/// <param name="input">
/// the data block. </param>
/// <returns> int. </returns>
/// <exception cref="IOException"> If there is a low-level I/O error. </exception>
private int CompareField(Term term, int termIndex, PagedBytesDataInput input)
{
input.Position = IndexToDataOffset.Get(termIndex);
return term.Field().CompareTo(Fields[input.ReadVInt()].Field());
}
/// <summary>
/// Compare the fields of the terms first, and if not equals return from
/// compare. If equal compare terms.
/// </summary>
/// <param name="term">
/// the term to compare. </param>
/// <param name="termIndex">
/// the position of the term in the input to compare </param>
/// <param name="input">
/// the input buffer. </param>
/// <returns> int. </returns>
/// <exception cref="IOException"> If there is a low-level I/O error. </exception>
private int CompareTo(Term term, int termIndex, PagedBytesDataInput input, BytesRef reuse)
{
// if term field does not equal mid's field index, then compare fields
// else if they are equal, compare term's string values...
int c = CompareField(term, termIndex, input);
if (c == 0)
{
reuse.Length = input.ReadVInt();
reuse.Grow(reuse.Length);
input.ReadBytes(reuse.Bytes, 0, reuse.Length);
return Comparator.Compare(term.Bytes(), reuse);
}
return c;
}