public override void Get(int docID, Int32sRef ordinals)
{
BytesRef bytes = new BytesRef();
values.Get(docID, bytes);
outerInstance.Decode(bytes, ordinals);
}
/// <summary>
/// Subclass & override if you change the encoding.
/// </summary>
protected virtual void Decode(BytesRef buf, Int32sRef ordinals)
{
// grow the buffer up front, even if by a large number of values (buf.length)
// that saves the need to check inside the loop for every decoded value if
// the buffer needs to grow.
if (ordinals.Int32s.Length < buf.Length)
{
ordinals.Int32s = ArrayUtil.Grow(ordinals.Int32s, buf.Length);
}
ordinals.Offset = 0;
ordinals.Length = 0;
// it is better if the decoding is inlined like so, and not e.g.
// in a utility method
int upto = buf.Offset + buf.Length;
int value = 0;
int offset = buf.Offset;
int prev = 0;
while (offset < upto)
{
byte b = buf.Bytes[offset++];
if ((sbyte)b >= 0)
{
ordinals.Int32s[ordinals.Length] = ((value << 7) | b) + prev;
value = 0;
prev = ordinals.Int32s[ordinals.Length];
ordinals.Length++;
}
else
{
value = (value << 7) | (b & 0x7F);
}
}
}
/// <summary> /// Get the ordinals for this document. The <paramref name="ordinals"/>.<see cref="Int32sRef.Offset"/> /// must always be 0! /// </summary> public abstract void Get(int doc, Int32sRef ordinals);
