diff options
Diffstat (limited to 'third_party/sl4a/src/main/java/com/google/android/mobly/snippet/future/FutureResult.java')
-rw-r--r-- | third_party/sl4a/src/main/java/com/google/android/mobly/snippet/future/FutureResult.java | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/third_party/sl4a/src/main/java/com/google/android/mobly/snippet/future/FutureResult.java b/third_party/sl4a/src/main/java/com/google/android/mobly/snippet/future/FutureResult.java new file mode 100644 index 0000000..5e6edd3 --- /dev/null +++ b/third_party/sl4a/src/main/java/com/google/android/mobly/snippet/future/FutureResult.java @@ -0,0 +1,60 @@ +/* + * Copyright (C) 2016 Google 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 com.google.android.mobly.snippet.future; + +import java.util.concurrent.CountDownLatch; +import java.util.concurrent.Future; +import java.util.concurrent.TimeUnit; + +/** FutureResult represents an eventual execution result for asynchronous operations. */ +public class FutureResult<T> implements Future<T> { + + private final CountDownLatch mLatch = new CountDownLatch(1); + private volatile T mResult = null; + + public void set(T result) { + mResult = result; + mLatch.countDown(); + } + + @Override + public boolean cancel(boolean mayInterruptIfRunning) { + return false; + } + + @Override + public T get() throws InterruptedException { + mLatch.await(); + return mResult; + } + + @Override + public T get(long timeout, TimeUnit unit) throws InterruptedException { + mLatch.await(timeout, unit); + return mResult; + } + + @Override + public boolean isCancelled() { + return false; + } + + @Override + public boolean isDone() { + return mResult != null; + } +} |