UpdateFunction (apache-cassandra API)

All Superinterfaces:

com.google.common.base.Function<K,V>, java.util.function.Function<K,V>

All Known Implementing Classes:

UpdateFunction.Simple
```
public interface UpdateFunction<K,V>
extends com.google.common.base.Function<K,V>
```
An interface defining a function to be applied to both the object we are replacing in a BTree and the object that is intended to replace it, returning the object to actually replace it.

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static class UpdateFunction.Simple<V>

Field Summary

Fields
Modifier and Type Field Description

static UpdateFunction.Simple<java.lang.Object> noOp

Method Summary

All Methods Static Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`abortEarly()`
`void`	`allocated(long heapSize)`
`V`	`apply(V replacing, K update)`
`static <K> UpdateFunction<K,K>`	`noOp()`

Methods inherited from interface com.google.common.base.Function
apply, equals

Methods inherited from interface java.util.function.Function
andThen, compose

- Field Detail
  - noOp
```
static final UpdateFunction.Simple<java.lang.Object> noOp
```
- Method Detail
  - apply
```
V apply(V replacing,
        K update)
```
    Parameters:
    
    replacing - the value in the original tree we have matched
    
    update - the value in the updating collection that matched
    
    Returns:
    
    the value to insert into the new tree
  - abortEarly
```
boolean abortEarly()
```
    Returns:
    
    true if we should fail the update
  - allocated
```
void allocated(long heapSize)
```
    Parameters:
    
    heapSize - extra heap space allocated (over previous tree)
  - noOp
```
static <K> UpdateFunction<K,K> noOp()
```