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/*
* Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.nio.ByteBuffer;
import java.nio.MappedByteBuffer;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.Flow;
import java.util.function.Function;
import java.net.http.HttpRequest.BodyPublishers;
import java.net.http.HttpResponse.BodyHandler;
import java.net.http.HttpResponse.BodyHandlers;
import java.net.http.HttpResponse.BodySubscriber;
import java.net.http.HttpResponse.BodySubscribers;
/*
* @test
* @summary Basic test for Flow adapters with generic type parameters
* @compile FlowAdaptersCompileOnly.java
*/
public class FlowAdaptersCompileOnly {
static void makesSureDifferentGenericSignaturesCompile() {
BodyPublishers.fromPublisher(new BBPublisher());
BodyPublishers.fromPublisher(new MBBPublisher());
BodyHandlers.fromSubscriber(new ListSubscriber());
BodyHandlers.fromSubscriber(new CollectionSubscriber());
BodyHandlers.fromSubscriber(new IterableSubscriber());
BodyHandlers.fromSubscriber(new ObjectSubscriber());
BodySubscribers.fromSubscriber(new ListSubscriber());
BodySubscribers.fromSubscriber(new CollectionSubscriber());
BodySubscribers.fromSubscriber(new IterableSubscriber());
BodySubscribers.fromSubscriber(new ObjectSubscriber());
BodyPublishers.fromPublisher(new BBPublisher(), 1);
BodyPublishers.fromPublisher(new MBBPublisher(), 1);
BodyHandlers.fromSubscriber(new ListSubscriber(), Function.identity());
BodyHandlers.fromSubscriber(new CollectionSubscriber(), Function.identity());
BodyHandlers.fromSubscriber(new IterableSubscriber(), Function.identity());
BodyHandlers.fromSubscriber(new ObjectSubscriber(), Function.identity());
BodySubscribers.fromSubscriber(new ListSubscriber(), Function.identity());
BodySubscribers.fromSubscriber(new CollectionSubscriber(), Function.identity());
BodySubscribers.fromSubscriber(new IterableSubscriber(), Function.identity());
BodySubscribers.fromSubscriber(new ObjectSubscriber(), Function.identity());
}
static class BBPublisher implements Flow.Publisher<ByteBuffer> {
@Override
public void subscribe(Flow.Subscriber<? super ByteBuffer> subscriber) { }
}
static class MBBPublisher implements Flow.Publisher<MappedByteBuffer> {
@Override
public void subscribe(Flow.Subscriber<? super MappedByteBuffer> subscriber) { }
}
static class ListSubscriber implements Flow.Subscriber<List<ByteBuffer>> {
@Override public void onSubscribe(Flow.Subscription subscription) { }
@Override public void onNext(List<ByteBuffer> item) { }
@Override public void onError(Throwable throwable) { }
@Override public void onComplete() { }
}
static class CollectionSubscriber implements Flow.Subscriber<Collection<ByteBuffer>> {
@Override public void onSubscribe(Flow.Subscription subscription) { }
@Override public void onNext(Collection<ByteBuffer> item) { }
@Override public void onError(Throwable throwable) { }
@Override public void onComplete() { }
}
static class IterableSubscriber implements Flow.Subscriber<Iterable<ByteBuffer>> {
@Override public void onSubscribe(Flow.Subscription subscription) { }
@Override public void onNext(Iterable<ByteBuffer> item) { }
@Override public void onError(Throwable throwable) { }
@Override public void onComplete() { }
}
static class ObjectSubscriber implements Flow.Subscriber<Object> {
@Override public void onSubscribe(Flow.Subscription subscription) { }
@Override public void onNext(Object item) { }
@Override public void onError(Throwable throwable) { }
@Override public void onComplete() { }
}
// ---
static final Function<ListSubscriber,Integer> f1 = subscriber -> 1;
static final Function<ListSubscriber,Number> f2 = subscriber -> 2;
static final Function<ListSubscriberX,Integer> f3 = subscriber -> 3;
static final Function<ListSubscriberX,Number> f4 = subscriber -> 4;
static class ListSubscriberX extends ListSubscriber {
int getIntegerX() { return 5; }
}
static void makesSureDifferentGenericFunctionSignaturesCompile() {
BodyHandler<Integer> bh01 = BodyHandlers.fromSubscriber(new ListSubscriber(), s -> 6);
BodyHandler<Number> bh02 = BodyHandlers.fromSubscriber(new ListSubscriber(), s -> 7);
BodyHandler<Integer> bh03 = BodyHandlers.fromSubscriber(new ListSubscriber(), f1);
BodyHandler<Number> bh04 = BodyHandlers.fromSubscriber(new ListSubscriber(), f1);
BodyHandler<Number> bh05 = BodyHandlers.fromSubscriber(new ListSubscriber(), f2);
BodyHandler<Integer> bh06 = BodyHandlers.fromSubscriber(new ListSubscriberX(), f1);
BodyHandler<Number> bh07 = BodyHandlers.fromSubscriber(new ListSubscriberX(), f1);
BodyHandler<Number> bh08 = BodyHandlers.fromSubscriber(new ListSubscriberX(), f2);
BodyHandler<Integer> bh09 = BodyHandlers.fromSubscriber(new ListSubscriberX(), ListSubscriberX::getIntegerX);
BodyHandler<Number> bh10 = BodyHandlers.fromSubscriber(new ListSubscriberX(), ListSubscriberX::getIntegerX);
BodyHandler<Integer> bh11 = BodyHandlers.fromSubscriber(new ListSubscriberX(), f3);
BodyHandler<Number> bh12 = BodyHandlers.fromSubscriber(new ListSubscriberX(), f3);
BodyHandler<Number> bh13 = BodyHandlers.fromSubscriber(new ListSubscriberX(), f4);
BodySubscriber<Integer> bs01 = BodySubscribers.fromSubscriber(new ListSubscriber(), s -> 6);
BodySubscriber<Number> bs02 = BodySubscribers.fromSubscriber(new ListSubscriber(), s -> 7);
BodySubscriber<Integer> bs03 = BodySubscribers.fromSubscriber(new ListSubscriber(), f1);
BodySubscriber<Number> bs04 = BodySubscribers.fromSubscriber(new ListSubscriber(), f1);
BodySubscriber<Number> bs05 = BodySubscribers.fromSubscriber(new ListSubscriber(), f2);
BodySubscriber<Integer> bs06 = BodySubscribers.fromSubscriber(new ListSubscriberX(), f1);
BodySubscriber<Number> bs07 = BodySubscribers.fromSubscriber(new ListSubscriberX(), f1);
BodySubscriber<Number> bs08 = BodySubscribers.fromSubscriber(new ListSubscriberX(), f2);
BodySubscriber<Integer> bs09 = BodySubscribers.fromSubscriber(new ListSubscriberX(), ListSubscriberX::getIntegerX);
BodySubscriber<Number> bs10 = BodySubscribers.fromSubscriber(new ListSubscriberX(), ListSubscriberX::getIntegerX);
BodySubscriber<Integer> bs11 = BodySubscribers.fromSubscriber(new ListSubscriberX(), f3);
BodySubscriber<Number> bs12 = BodySubscribers.fromSubscriber(new ListSubscriberX(), f3);
BodySubscriber<Number> bs13 = BodySubscribers.fromSubscriber(new ListSubscriberX(), f4);
}
// ---
static class NumberSubscriber implements Flow.Subscriber<List<ByteBuffer>> {
@Override public void onSubscribe(Flow.Subscription subscription) { }
@Override public void onNext(List<ByteBuffer> item) { }
@Override public void onError(Throwable throwable) { }
@Override public void onComplete() { }
public Number getNumber() { return null; }
}
static class IntegerSubscriber extends NumberSubscriber {
@Override public void onSubscribe(Flow.Subscription subscription) { }
@Override public void onNext(List<ByteBuffer> item) { }
@Override public void onError(Throwable throwable) { }
@Override public void onComplete() { }
public Integer getInteger() { return null; }
}
static class LongSubscriber extends NumberSubscriber {
@Override public void onSubscribe(Flow.Subscription subscription) { }
@Override public void onNext(List<ByteBuffer> item) { }
@Override public void onError(Throwable throwable) { }
@Override public void onComplete() { }
public Long getLong() { return null; }
}
static final Function<NumberSubscriber,Number> numMapper = sub -> sub.getNumber();
static final Function<IntegerSubscriber,Integer> intMapper = sub -> sub.getInteger();
static final Function<LongSubscriber,Long> longMapper = sub -> sub.getLong();
public void makesSureDifferentGenericSubscriberSignaturesCompile()
throws Exception
{
HttpClient client = null;
HttpRequest request = null;
IntegerSubscriber sub1 = new IntegerSubscriber();
HttpResponse<Integer> r1 = client.send(request, BodyHandlers.fromSubscriber(sub1, IntegerSubscriber::getInteger));
HttpResponse<Number> r2 = client.send(request, BodyHandlers.fromSubscriber(sub1, IntegerSubscriber::getInteger));
HttpResponse<Number> r3 = client.send(request, BodyHandlers.fromSubscriber(sub1, NumberSubscriber::getNumber));
HttpResponse<Integer> r4 = client.send(request, BodyHandlers.fromSubscriber(sub1, intMapper));
HttpResponse<Number> r5 = client.send(request, BodyHandlers.fromSubscriber(sub1, intMapper));
HttpResponse<Number> r6 = client.send(request, BodyHandlers.fromSubscriber(sub1, numMapper));
// compiles but makes little sense. Just what you get with any usage of `? super`
final Function<Object,Number> objectMapper = sub -> 1;
client.sendAsync(request, BodyHandlers.fromSubscriber(sub1, objectMapper));
// does not compile, as expected ( uncomment to see )
//HttpResponse<Number> r7 = client.send(request, BodyHandler.fromSubscriber(sub1, longMapper));
}
}
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