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.
/** * 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.exceptions.Exceptions; import io.reactivex.internal.disposables.EmptyDisposable; import io.reactivex.internal.functions.ObjectHelper;
Calls a MaybeOperator for the incoming MaybeObserver.
Type parameters:
  • <T> – the upstream value type
  • <R> – the downstream value type
/** * Calls a MaybeOperator for the incoming MaybeObserver. * * @param <T> the upstream value type * @param <R> the downstream value type */
public final class MaybeLift<T, R> extends AbstractMaybeWithUpstream<T, R> { final MaybeOperator<? extends R, ? super T> operator; public MaybeLift(MaybeSource<T> source, MaybeOperator<? extends R, ? super T> operator) { super(source); this.operator = operator; } @Override protected void subscribeActual(MaybeObserver<? super R> observer) { MaybeObserver<? super T> lifted; try { lifted = ObjectHelper.requireNonNull(operator.apply(observer), "The operator returned a null MaybeObserver"); } catch (Throwable ex) { Exceptions.throwIfFatal(ex); EmptyDisposable.error(ex, observer); return; } source.subscribe(lifted); } }