org.apache.lucene.facet.encoding
Class DGapIntEncoder
java.lang.Object
org.apache.lucene.facet.encoding.IntEncoder
org.apache.lucene.facet.encoding.IntEncoderFilter
org.apache.lucene.facet.encoding.DGapIntEncoder
public final class DGapIntEncoder
- extends IntEncoderFilter
An IntEncoderFilter
which encodes the gap between the given values,
rather than the values themselves. This encoder usually yields better
encoding performance space-wise (i.e., the final encoded values consume less
space) if the values are 'close' to each other.
NOTE: this encoder assumes the values are given to
encode(IntsRef, BytesRef)
in an ascending sorted manner, which ensures only
positive values are encoded and thus yields better performance. If you are
not sure whether the values are sorted or not, it is possible to chain this
encoder with SortingIntEncoder
to ensure the values will be
sorted before encoding.
- WARNING: This API is experimental and might change in incompatible ways in the next release.
DGapIntEncoder
public DGapIntEncoder(IntEncoder encoder)
- Initializes with the given encoder.
encode
public void encode(IntsRef values,
BytesRef buf)
- Description copied from class:
IntEncoder
- Encodes the values to the given buffer. Note that the buffer's offset and
length are set to 0.
- Specified by:
encode
in class IntEncoder
createMatchingDecoder
public IntDecoder createMatchingDecoder()
- Description copied from class:
IntEncoder
- Returns an
IntDecoder
which can decode the values that were encoded
with this encoder.
- Specified by:
createMatchingDecoder
in class IntEncoder
toString
public String toString()
- Overrides:
toString
in class Object
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