| /* |
| * Copyright 2018 The Android Open Source Project |
| * |
| * 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 androidx.work.impl; |
| |
| import androidx.annotation.NonNull; |
| import androidx.annotation.RestrictTo; |
| import androidx.lifecycle.LiveData; |
| import androidx.lifecycle.MutableLiveData; |
| import androidx.work.Operation; |
| import androidx.work.impl.utils.futures.SettableFuture; |
| |
| import com.google.common.util.concurrent.ListenableFuture; |
| |
| /** |
| * A concrete implementation of a {@link Operation}. |
| * |
| * @hide |
| */ |
| @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP) |
| public class OperationImpl implements Operation { |
| |
| private final MutableLiveData<State> mOperationState; |
| private final SettableFuture<State.SUCCESS> mOperationFuture; |
| |
| public OperationImpl() { |
| mOperationState = new MutableLiveData<>(); |
| mOperationFuture = SettableFuture.create(); |
| // Mark the operation as in progress. |
| setState(Operation.IN_PROGRESS); |
| } |
| |
| @Override |
| public @NonNull ListenableFuture<State.SUCCESS> getResult() { |
| return mOperationFuture; |
| } |
| |
| @Override |
| public @NonNull LiveData<State> getState() { |
| return mOperationState; |
| } |
| |
| /** |
| * Updates the {@link androidx.work.Operation.State} of the {@link Operation}. |
| * |
| * @param state The current {@link Operation.State} |
| */ |
| public void setState(@NonNull State state) { |
| mOperationState.postValue(state); |
| |
| // Only terminal state get updates to the future. |
| if (state instanceof State.SUCCESS) { |
| mOperationFuture.set((State.SUCCESS) state); |
| } else if (state instanceof State.FAILURE) { |
| State.FAILURE failed = (State.FAILURE) state; |
| mOperationFuture.setException(failed.getThrowable()); |
| } |
| } |
| } |
