io.cloudevents.core

Class CloudEventUtils

java.lang.Object

io.cloudevents.core.CloudEventUtils

public final class CloudEventUtils
extends Object

This class contains a set of utility methods to deal with conversions of io.cloudevents related interfaces

Method Summary

Modifier and Type	Method and Description
static <R extends CloudEventData> R	mapData(CloudEvent event, CloudEventDataMapper<R> mapper) Get the data contained in event and map it using the provided mapper.
static CloudEventContextReader	toContextReader(CloudEventContext event) Convert a CloudEvent to a CloudEventContextReader.
static CloudEvent	toEvent(CloudEventReader reader) Convert a CloudEventReader to a CloudEvent.
static CloudEvent	toEvent(CloudEventReader reader, CloudEventDataMapper<?> mapper) Convert a CloudEventReader to a CloudEvent mapping the data with the provided mapper.
static CloudEventReader	toReader(CloudEvent event) Convert a CloudEvent to a CloudEventReader.

Methods inherited from class java.lang.Object

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

Method Detail

toReader

public static CloudEventReader toReader(CloudEvent event)

Convert a CloudEvent to a CloudEventReader. This method provides a default implementation for CloudEvent that doesn't implement CloudEventReader.

It's safe to use the returned CloudEventReader multiple times.

Parameters:

event - the event to convert

Returns:

the reader implementation

toContextReader

public static CloudEventContextReader toContextReader(CloudEventContext event)

Convert a CloudEvent to a CloudEventContextReader. This method provides a default implementation for CloudEvent that doesn't implement CloudEventContextReader.

It's safe to use the returned CloudEventReader multiple times.

Parameters:

event - the event to convert

Returns:

the context reader implementation

toEvent

public static CloudEvent toEvent(CloudEventReader reader)
                          throws CloudEventRWException

Convert a CloudEventReader to a CloudEvent.

Parameters:

reader - the reader where to read the message from

Returns:

the reader implementation

Throws:

CloudEventRWException

toEvent

public static CloudEvent toEvent(CloudEventReader reader,
                                 CloudEventDataMapper<?> mapper)
                          throws CloudEventRWException

Convert a CloudEventReader to a CloudEvent mapping the data with the provided mapper.

Parameters:

reader - the reader where to read the message from

mapper - the mapper to use when reading the data

Returns:

the reader implementation

Throws:

CloudEventRWException

mapData

@Nullable
public static <R extends CloudEventData> R mapData(CloudEvent event,
                                                             CloudEventDataMapper<R> mapper)

Get the data contained in event and map it using the provided mapper.

Type Parameters:

R - the returned CloudEventData implementation from the provided mapper

Parameters:

event - the event eventually containing the data

mapper - the mapper to use to map the data

Returns:

the data contained in event and mapped with mapper, if any, otherwise null