org.apache.datasketches.tuple

Interface Summary

All Known Subinterfaces:

UpdatableSummary<U>

All Known Implementing Classes:

ArrayOfStringsSummary, DoubleSummary, IntegerSummary

public interface Summary

Interface for user-defined Summary, which is associated with every hash in a tuple sketch

Method Summary

Modifier and Type	Method and Description
Summary	copy() Deep copy.
byte[]	toByteArray() This is to serialize a Summary instance to a byte array.

Method Detail

copy

Summary copy()

Deep copy.

Caution: This must implement a deep copy.

Returns:

deep copy of the Summary

toByteArray

byte[] toByteArray()

This is to serialize a Summary instance to a byte array.

The user should encode in the byte array its total size, which is used during deserialization, especially if the Summary has variable sized elements.

Returns:

serialized representation of the Summary