hu.akarnokd.rxjava2.subscribers.nbp.NbpObservers Maven / Gradle / Ivy
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rxjava2-backport developed by David Karnok
/**
* Copyright 2015 David Karnok and Netflix, Inc.
*
* 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 hu.akarnokd.rxjava2.subscribers.nbp;
import hu.akarnokd.rxjava2.NbpObserver;
import hu.akarnokd.rxjava2.functions.Consumer;
import hu.akarnokd.rxjava2.internal.functions.*;
import hu.akarnokd.rxjava2.plugins.RxJavaPlugins;
/**
* Utility class to create Observers from lambdas.
*/
public final class NbpObservers {
/** Utility class with factory methods only. */
private NbpObservers() {
throw new IllegalStateException("No instances!");
}
public static NbpObserver empty() {
return new NbpObserver() {
@Override
public void onNext(T t) {
}
@Override
public void onError(Throwable t) {
RxJavaPlugins.onError(t);
}
@Override
public void onComplete() {
}
};
}
public static NbpAsyncObserver emptyAsync() {
return new NbpAsyncObserver() {
@Override
public void onNext(T t) {
}
@Override
public void onError(Throwable t) {
RxJavaPlugins.onError(t);
}
@Override
public void onComplete() {
}
};
}
public static NbpObserver create(Consumer onNext) {
return create(onNext, RxJavaPlugins.errorConsumer(), Functions.emptyRunnable(), Functions.emptyRunnable());
}
public static NbpObserver create(Consumer onNext,
Consumer onError) {
return create(onNext, onError, Functions.emptyRunnable(), Functions.emptyRunnable());
}
public static NbpObserver create(Consumer onNext,
Consumer onError, Runnable onComplete) {
return create(onNext, onError, onComplete, Functions.emptyRunnable());
}
public static NbpObserver create(
final Consumer onNext,
final Consumer onError,
final Runnable onComplete,
final Runnable onStart) {
Objects.requireNonNull(onNext, "onNext is null");
Objects.requireNonNull(onError, "onError is null");
Objects.requireNonNull(onComplete, "onComplete is null");
Objects.requireNonNull(onStart, "onStart ins null");
return new NbpObserver() {
boolean done;
@Override
protected void onStart() {
super.onStart();
try {
onStart.run();
} catch (Throwable e) {
done = true;
cancel();
try {
onError.accept(e);
} catch (Throwable ex) {
RxJavaPlugins.onError(ex);
RxJavaPlugins.onError(e);
}
}
}
@Override
public void onNext(T t) {
if (done) {
return;
}
try {
onNext.accept(t);
} catch (Throwable e) {
done = true;
cancel();
try {
onError.accept(e);
} catch (Throwable ex) {
RxJavaPlugins.onError(ex);
RxJavaPlugins.onError(e);
}
}
}
@Override
public void onError(Throwable t) {
if (done) {
RxJavaPlugins.onError(t);
return;
}
done = true;
try {
onError.accept(t);
} catch (Throwable ex) {
RxJavaPlugins.onError(ex);
RxJavaPlugins.onError(t);
}
}
@Override
public void onComplete() {
if (done) {
return;
}
done = true;
try {
onComplete.run();
} catch (Throwable e) {
RxJavaPlugins.onError(e);
}
}
};
}
public static NbpAsyncObserver createAsync(Consumer onNext) {
return createAsync(onNext, RxJavaPlugins.errorConsumer(), Functions.emptyRunnable(), Functions.emptyRunnable());
}
public static NbpAsyncObserver createAsync(Consumer onNext,
Consumer onError) {
return createAsync(onNext, onError, Functions.emptyRunnable(), Functions.emptyRunnable());
}
public static NbpAsyncObserver createAsync(Consumer onNext,
Consumer onError, Runnable onComplete) {
return createAsync(onNext, onError, onComplete, Functions.emptyRunnable());
}
public static NbpAsyncObserver createAsync(
final Consumer onNext,
final Consumer onError,
final Runnable onComplete,
final Runnable onStart) {
Objects.requireNonNull(onNext, "onNext is null");
Objects.requireNonNull(onError, "onError is null");
Objects.requireNonNull(onComplete, "onComplete is null");
Objects.requireNonNull(onStart, "onStart is null");
return new NbpAsyncObserver() {
boolean done;
@Override
protected void onStart() {
try {
onStart.run();
} catch (Throwable e) {
done = true;
cancel();
try {
onError.accept(e);
} catch (Throwable ex) {
RxJavaPlugins.onError(ex);
RxJavaPlugins.onError(e);
}
}
}
@Override
public void onNext(T t) {
if (done) {
return;
}
try {
onNext.accept(t);
} catch (Throwable e) {
done = true;
cancel();
try {
onError.accept(e);
} catch (Throwable ex) {
RxJavaPlugins.onError(ex);
RxJavaPlugins.onError(e);
}
}
}
@Override
public void onError(Throwable t) {
if (done) {
RxJavaPlugins.onError(t);
return;
}
done = true;
try {
onError.accept(t);
} catch (Throwable ex) {
RxJavaPlugins.onError(ex);
RxJavaPlugins.onError(t);
}
}
@Override
public void onComplete() {
if (done) {
return;
}
done = true;
try {
onComplete.run();
} catch (Throwable e) {
RxJavaPlugins.onError(e);
}
}
};
}
}
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