AdHash (Apache ZooKeeper - Server 3.9.1 API)

java.lang.Object
- org.apache.zookeeper.server.util.AdHash

```
public class AdHash
extends Object
```
This incremental hash is used to keep track of the hash of the data tree to that we can quickly validate that things are in sync. See the excellent paper: A New Paradigm for collision-free hashing: Incrementality at reduced cost, M. Bellare and D. Micciancio

Constructor Summary

Constructors
Constructor Description

AdHash()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`AdHash`	`addDigest(long digest)`	Add new digest to the hash value maintained in this class.
`void`	`clear()`
`boolean`	`equals(Object other)`
`long`	`getHash()`	Return the long value of the hash.
`int`	`hashCode()`
`AdHash`	`removeDigest(long digest)`	Remove the digest from the hash value.
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - AdHash
```
public AdHash()
```
- Method Detail
  - addDigest
```
public AdHash addDigest(long digest)
```
    Add new digest to the hash value maintained in this class.
    
    Parameters:
    
    digest - the value to add on
    
    Returns:
    
    the AdHash itself for chained operations
  - removeDigest
```
public AdHash removeDigest(long digest)
```
    Remove the digest from the hash value.
    
    Parameters:
    
    digest - the value to remove
    
    Returns:
    
    the AdHash itself for chained operations
  - getHash
```
public long getHash()
```
    Return the long value of the hash.
  - equals
```
public boolean equals(Object other)
```
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object
  - clear
```
public void clear()
```