/*
* Copyright (c) 2011-2017 Pivotal Software Inc, All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package reactor.core.publisher;
import java.util.
Objects;
import java.util.stream.
Stream;
import org.reactivestreams.
Publisher;
import org.reactivestreams.
Subscriber;
import org.reactivestreams.
Subscription;
import reactor.core.
CoreSubscriber;
import reactor.core.
Exceptions;
import reactor.core.
Scannable;
import reactor.util.annotation.
Nullable;
import reactor.util.context.
Context;
/**
* @author Stephane Maldini
*/
final class
DelegateProcessor<IN, OUT> extends
FluxProcessor<IN, OUT> {
final
Publisher<OUT>
downstream;
final
Subscriber<IN>
upstream;
DelegateProcessor(
Publisher<OUT>
downstream,
Subscriber<IN>
upstream) {
this.
downstream =
Objects.
requireNonNull(
downstream, "Downstream must not be null");
this.
upstream =
Objects.
requireNonNull(
upstream, "Upstream must not be null");
}
@
Override
public
Context currentContext() {
if(
upstream instanceof
CoreSubscriber){
return ((
CoreSubscriber)
upstream).
currentContext();
}
return
Context.
empty();
}
@
Override
public void
onComplete() {
upstream.
onComplete();
}
@
Override
public void
onError(
Throwable t) {
upstream.
onError(
t);
}
@
Override
public void
onNext(IN
in) {
upstream.
onNext(
in);
}
@
Override
public void
onSubscribe(
Subscription s) {
upstream.
onSubscribe(
s);
}
@
Override
public void
subscribe(
CoreSubscriber<? super OUT>
actual) {
Objects.
requireNonNull(
actual, "subscribe");
downstream.
subscribe(
actual);
}
@
Override
@
SuppressWarnings("unchecked")
public boolean
isSerialized() {
return
upstream instanceof
SerializedSubscriber ||
(
upstream instanceof
FluxProcessor &&
((
FluxProcessor<?, ?>)
upstream).
isSerialized());
}
@
Override
public
Stream<? extends
Scannable>
inners() {
//noinspection ConstantConditions
return
Scannable.
from(
upstream)
.
inners();
}
@
Override
public int
getBufferSize() {
//noinspection ConstantConditions
return
Scannable.
from(
upstream)
.
scanOrDefault(
Attr.
CAPACITY, super.getBufferSize());
}
@
Override
@
Nullable
public
Throwable getError() {
//noinspection ConstantConditions
return
Scannable.
from(
upstream)
.
scanOrDefault(
Attr.
ERROR, super.getError());
}
@
Override
public boolean
isTerminated() {
//noinspection ConstantConditions
return
Scannable.
from(
upstream)
.
scanOrDefault(
Attr.
TERMINATED, super.isTerminated());
}
@
Override
@
Nullable
public
Object scanUnsafe(
Attr key) {
if (
key ==
Attr.
PARENT) {
return
downstream;
}
//noinspection ConstantConditions
return
Scannable.
from(
upstream)
.
scanUnsafe(
key);
}
}