/**
* Copyright (c) 2016-present, RxJava Contributors.
*
* 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 io.reactivex.internal.operators.maybe;
import io.reactivex.*;
import io.reactivex.disposables.
Disposable;
import io.reactivex.internal.disposables.
DisposableHelper;
import io.reactivex.internal.functions.
ObjectHelper;
import io.reactivex.internal.fuseable.
HasUpstreamMaybeSource;
/**
* Signals true if the source signals a value that is object-equals with the provided
* value, false otherwise or for empty sources.
*
* @param <T> the value type
*/
public final class
MaybeContains<T> extends
Single<
Boolean> implements
HasUpstreamMaybeSource<T> {
final
MaybeSource<T>
source;
final
Object value;
public
MaybeContains(
MaybeSource<T>
source,
Object value) {
this.
source =
source;
this.
value =
value;
}
@
Override
public
MaybeSource<T>
source() {
return
source;
}
@
Override
protected void
subscribeActual(
SingleObserver<? super
Boolean>
observer) {
source.
subscribe(new
ContainsMaybeObserver(
observer,
value));
}
static final class
ContainsMaybeObserver implements
MaybeObserver<
Object>,
Disposable {
final
SingleObserver<? super
Boolean>
downstream;
final
Object value;
Disposable upstream;
ContainsMaybeObserver(
SingleObserver<? super
Boolean>
actual,
Object value) {
this.
downstream =
actual;
this.
value =
value;
}
@
Override
public void
dispose() {
upstream.
dispose();
upstream =
DisposableHelper.
DISPOSED;
}
@
Override
public boolean
isDisposed() {
return
upstream.
isDisposed();
}
@
Override
public void
onSubscribe(
Disposable d) {
if (
DisposableHelper.
validate(this.
upstream,
d)) {
this.
upstream =
d;
downstream.
onSubscribe(this);
}
}
@
Override
public void
onSuccess(
Object value) {
upstream =
DisposableHelper.
DISPOSED;
downstream.
onSuccess(
ObjectHelper.
equals(
value, this.
value));
}
@
Override
public void
onError(
Throwable e) {
upstream =
DisposableHelper.
DISPOSED;
downstream.
onError(
e);
}
@
Override
public void
onComplete() {
upstream =
DisposableHelper.
DISPOSED;
downstream.
onSuccess(false);
}
}
}