Summary (datasketches-java 4.2.0 API)

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

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	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