/* * Copyright (C) 2010 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 com.android.gallery3d.util; // This Future differs from the java.util.concurrent.Future in these aspects: // // - Once cancel() is called, isCancelled() always returns true. It is a sticky // flag used to communicate to the implementation. The implmentation may // ignore that flag. Regardless whether the Future is cancelled, a return // value will be provided to get(). The implementation may choose to return // null if it finds the Future is cancelled. // // - get() does not throw exceptions. // public interface Future { public void cancel(); public boolean isCancelled(); public boolean isDone(); public T get(); public void waitDone(); }