/**
* 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.internal.functions.
ObjectHelper;
import java.util.concurrent.
Callable;
import io.reactivex.*;
import io.reactivex.disposables.
Disposables;
import io.reactivex.exceptions.
Exceptions;
/**
* Signals a Throwable returned by a Callable.
*
* @param <T> the value type
*/
public final class
MaybeErrorCallable<T> extends
Maybe<T> {
final
Callable<? extends
Throwable>
errorSupplier;
public
MaybeErrorCallable(
Callable<? extends
Throwable>
errorSupplier) {
this.
errorSupplier =
errorSupplier;
}
@
Override
protected void
subscribeActual(
MaybeObserver<? super T>
observer) {
observer.
onSubscribe(
Disposables.
disposed());
Throwable ex;
try {
ex =
ObjectHelper.
requireNonNull(
errorSupplier.
call(), "Callable returned null throwable. Null values are generally not allowed in 2.x operators and sources.");
} catch (
Throwable ex1) {
Exceptions.
throwIfFatal(
ex1);
ex =
ex1;
}
observer.
onError(
ex);
}
}