org.infinispan.atomic
Enum NullDelta

java.lang.Object
  java.lang.Enum<NullDelta>
      org.infinispan.atomic.NullDelta

All Implemented Interfaces:

Serializable, Comparable<NullDelta>, Delta

public enum NullDelta
extends Enum<NullDelta>
implements Delta

Represents no changes.

Since:

4.0

Author:

Manik Surtani (manik AT jboss DOT org), Galder Zamarreño

Enum Constant Summary

INSTANCE

Method Summary

DeltaAware	merge(DeltaAware other) Merge the current set of deltas with a given DeltaAware instance, and return a coherent and complete DeltaAware instance.
static NullDelta	valueOf(String name) Returns the enum constant of this type with the specified name.
static NullDelta[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

INSTANCE

public static final NullDelta INSTANCE

Method Detail

values

public static NullDelta[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (NullDelta c : NullDelta.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static NullDelta valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

merge

public DeltaAware merge(DeltaAware other)

Description copied from interface: Delta

Merge the current set of deltas with a given DeltaAware instance, and return a coherent and complete DeltaAware instance. Implementations should be able to deal with null values passed in, or values of a different type from the expected DeltaAware instance. Usually the approach would be to ignore what is passed in, create a new instance of the DeltaAware implementation that the current Delta implementation is written for, apply changes and pass it back.

Specified by:

merge in interface Delta

Parameters:

other - instance to merge with, or null if no merging is needed

Returns:

a fully coherent and usable instance of DeltaAware which may or may not be the same instance passed in