org.axonframework.serialization.upcasting.event

Enum NoOpEventUpcaster

java.lang.Object

java.lang.Enum<NoOpEventUpcaster>

org.axonframework.serialization.upcasting.event.NoOpEventUpcaster

All Implemented Interfaces:

Serializable, Comparable<NoOpEventUpcaster>, EventUpcaster, Upcaster<IntermediateEventRepresentation>

public enum NoOpEventUpcaster
extends Enum<NoOpEventUpcaster>
implements EventUpcaster

Event upcaster that does nothing.

Since:

3.0

Author:

Rene de Waele

Enum Constant Summary

Enum Constants

Enum Constant and Description
INSTANCE Instance of an EventUpcaster that does nothing.

Method Summary

Modifier and Type	Method and Description
Stream<IntermediateEventRepresentation>	upcast(Stream<IntermediateEventRepresentation> intermediateRepresentations) Apply this upcaster to a stream of intermediateRepresentations and return the altered stream.
static NoOpEventUpcaster	valueOf(String name) Returns the enum constant of this type with the specified name.
static NoOpEventUpcaster[]	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 NoOpEventUpcaster INSTANCE

Instance of an EventUpcaster that does nothing.

Method Detail

values

public static NoOpEventUpcaster[] 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 (NoOpEventUpcaster c : NoOpEventUpcaster.values())
    System.out.println(c);

Returns:

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

valueOf

public static NoOpEventUpcaster 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

upcast

public Stream<IntermediateEventRepresentation> upcast(Stream<IntermediateEventRepresentation> intermediateRepresentations)

Description copied from interface: Upcaster

Apply this upcaster to a stream of intermediateRepresentations and return the altered stream.

To upcast an object an upcaster should apply a mapping function to the input stream (Stream.map(java.util.function.Function)). To remove an object from the stream the upcaster should filter the input stream (Stream.filter(java.util.function.Predicate)). To split an input object into more than one objects use Stream.flatMap(java.util.function.Function).

In some cases the upcasting result of an Upcaster may depend on more than one input object. In that case an Upcaster may store state in the method during upcasting or even read ahead in the stream.

Specified by:

upcast in interface Upcaster<IntermediateEventRepresentation>

Parameters:

intermediateRepresentations - The input stream of representations of objects

Returns:

the output stream of representations after applying the upcast function