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Use reflection for JdkFlowAdapter 

To avoid compiler issues on Eclipse.
This commit is contained in:
Rossen Stoyanchev 2018-06-13 09:38:54 -04:00
parent 928b7804c8
commit 0078f46779
1 changed files with 11 additions and 8 deletions
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19
spring-core/src/main/java/org/springframework/core/ReactiveAdapterRegistry.java
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@ -280,22 +280,25 @@ public class ReactiveAdapterRegistry {
private static class ReactorJdkFlowAdapterRegistrar {
void registerAdapter(ReactiveAdapterRegistry registry) throws Exception {
// TODO: remove reflection when build requires JDK 9+
Class<?> type = ClassUtils.forName("java.util.concurrent.Flow.Publisher", getClass().getClassLoader());
Method toFluxMethod = getMethod("flowPublisherToFlux", type);
Method toFlowMethod = getMethod("publisherToFlowPublisher", Publisher.class);
String publisherName = "java.util.concurrent.Flow.Publisher";
Class<?> publisherClass = ClassUtils.forName(publisherName, getClass().getClassLoader());
String adapterName = "reactor.adapter.JdkFlowAdapter";
Class<?> flowAdapterClass = ClassUtils.forName(adapterName, getClass().getClassLoader());
Method toFluxMethod = flowAdapterClass.getMethod("flowPublisherToFlux", publisherClass);
Method toFlowMethod = flowAdapterClass.getMethod("publisherToFlowPublisher", Publisher.class);
Object emptyFlow = ReflectionUtils.invokeMethod(toFlowMethod, null, Flux.empty());
registry.registerReactiveType(
ReactiveTypeDescriptor.multiValue(type, () -> emptyFlow),
ReactiveTypeDescriptor.multiValue(publisherClass, () -> emptyFlow),
source -> (Publisher<?>) ReflectionUtils.invokeMethod(toFluxMethod, null, source),
publisher -> ReflectionUtils.invokeMethod(toFlowMethod, null, publisher)
);
}
private static Method getMethod(String name, Class<?> argumentType) throws NoSuchMethodException {
return reactor.adapter.JdkFlowAdapter.class.getMethod(name, argumentType);
}
}