diff options
Diffstat (limited to 'gallerycommon/src/com/android/gallery3d/util/Future.java')
-rw-r--r-- | gallerycommon/src/com/android/gallery3d/util/Future.java | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/gallerycommon/src/com/android/gallery3d/util/Future.java b/gallerycommon/src/com/android/gallery3d/util/Future.java new file mode 100644 index 000000000..580a2a120 --- /dev/null +++ b/gallerycommon/src/com/android/gallery3d/util/Future.java @@ -0,0 +1,35 @@ +/* + * 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<T> { + public void cancel(); + public boolean isCancelled(); + public boolean isDone(); + public T get(); + public void waitDone(); +} |