io.cloudevents.core.provider

Class ExtensionProvider

java.lang.Object

io.cloudevents.core.provider.ExtensionProvider

@ParametersAreNonnullByDefault
public final class ExtensionProvider
extends Object

Singleton to materialize CloudEvent extensions as POJOs.

You can materialize an CloudEventExtension POJO with ExtensionProvider.getInstance().parseExtension(DistributedTracingExtension.class, event).

Method Summary

Modifier and Type	Method and Description
static ExtensionProvider	getInstance()
<T extends CloudEventExtension> T	parseExtension(Class<T> extensionClass, CloudEventExtensions eventExtensions) Parse an extension from the CloudEventExtensions, materializing the corresponding POJO.
<T extends CloudEventExtension> void	registerExtension(Class<T> extensionClass, Supplier<T> factory) Register a new extension type.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static ExtensionProvider getInstance()

Returns:

instance of ExtensionProvider

registerExtension

public <T extends CloudEventExtension> void registerExtension(Class<T> extensionClass,
                                                              Supplier<T> factory)

Register a new extension type.

Type Parameters:

T - the type of the extension

Parameters:

extensionClass - the class implementing CloudEventExtension

factory - the empty arguments factory

parseExtension

@Nullable
public <T extends CloudEventExtension> T parseExtension(Class<T> extensionClass,
                                                                  CloudEventExtensions eventExtensions)

Parse an extension from the CloudEventExtensions, materializing the corresponding POJO.

Type Parameters:

T - the type of the extension

Parameters:

extensionClass - the class implementing CloudEventExtension

eventExtensions - the event extensions to read

Returns:

the parsed extension