com.basho.riak.client.api.commands.kv

Class UpdateValue.Update<T>

java.lang.Object

com.basho.riak.client.api.commands.kv.UpdateValue.Update<T>

Type Parameters:

T -

Enclosing class:

UpdateValue

public abstract static class UpdateValue.Update<T>
extends Object

An update on a Riak object

Constructor Summary

Constructors

Constructor and Description
UpdateValue.Update()

Method Summary

Methods

Modifier and Type	Method and Description
abstract T	apply(T original) Modify the input value and return the modification.
static <T> UpdateValue.Update<T>	clobberUpdate(T newValue) Returns an Update that replaces whatever is in Riak.
boolean	isModified() true if this Update has modified the input value and requires a store, defaults to true
static <T> UpdateValue.Update<T>	noopUpdate() Returns a no-op Update instance.
protected void	setModified(boolean modified) Set the modification status of this update, defaults to true

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

UpdateValue.Update

public UpdateValue.Update()

Method Detail

apply

public abstract T apply(T original)

Modify the input value and return the modification. It is OK to modify the input value in-place and return it.

Parameters:

original - the resolved value

Returns:

a modified value

setModified

protected void setModified(boolean modified)

Set the modification status of this update, defaults to true

Parameters:

modified - true if modified

isModified

public boolean isModified()

true if this Update has modified the input value and requires a store, defaults to true

Returns:

true if modified

noopUpdate

public static <T> UpdateValue.Update<T> noopUpdate()

Returns a no-op Update instance.

This can be used to simply resolve siblings that exist in Riak without modifying the resolved object.

Returns:

An Update instance the does not modify anything.

clobberUpdate

public static <T> UpdateValue.Update<T> clobberUpdate(T newValue)

Returns an Update that replaces whatever is in Riak.

This Update simply returns the supplied value, thus replacing anything currently in Riak with that value.

Parameters:

newValue - the obj to store in Riak.

Returns:

an Update instance.