auto import from //depot/cupcake/@135843

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diff --git a/core/java/android/os/AsyncTask.java b/core/java/android/os/AsyncTask.java
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--- a/core/java/android/os/AsyncTask.java
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@@ -1,454 +0,0 @@
-/*
- * Copyright (C) 2008 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 android.os;
-
-import java.util.concurrent.ThreadPoolExecutor;
-import java.util.concurrent.TimeUnit;
-import java.util.concurrent.BlockingQueue;
-import java.util.concurrent.LinkedBlockingQueue;
-import java.util.concurrent.ThreadFactory;
-import java.util.concurrent.Callable;
-import java.util.concurrent.FutureTask;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.TimeoutException;
-import java.util.concurrent.CancellationException;
-import java.util.concurrent.atomic.AtomicInteger;
-
-/**
- * <p>AsyncTask enables proper and easy use of the UI thread. This class allows to
- * perform background operations and publish results on the UI thread without
- * having to manipulate threads and/or handlers.</p>
- *
- * <p>An asynchronous task is defined by a computation that runs on a background thread and
- * whose result is published on the UI thread. An asynchronous task is defined by 3 generic
- * types, called <code>Params</code>, <code>Progress</code> and <code>Result</code>,
- * and 4 steps, called <code>begin</code>, <code>doInBackground</code>,
- * <code>processProgress<code> and <code>end</code>.</p>
- *
- * <h2>Usage</h2>
- * <p>AsyncTask must be subclassed to be used. The subclass will override at least
- * one method ({@link #doInBackground}), and most often will override a
- * second one ({@link #onPostExecute}.)</p>
- *
- * <p>Here is an example of subclassing:</p>
- * <pre class="prettyprint">
- * private class DownloadFilesTask extends AsyncTask&lt;URL, Integer, Long&gt; {
- *     protected Long doInBackground(URL... urls) {
- *         int count = urls.length;
- *         long totalSize = 0;
- *         for (int i = 0; i < count; i++) {
- *             totalSize += Downloader.downloadFile(urls[i]);
- *             publishProgress((int) ((i / (float) count) * 100));
- *         }
- *         return totalSize;
- *     }
- *
- *     protected void onProgressUpdate(Integer... progress) {
- *         setProgressPercent(progress[0]);
- *     }
- *
- *     protected void onPostExecute(Long result) {
- *         showDialog("Downloaded " + result + " bytes");
- *     }
- * }
- * </pre>
- *
- * <p>Once created, a task is executed very simply:</p>
- * <pre class="prettyprint">
- * new DownloadFilesTask().execute(url1, url2, url3);
- * </pre>
- *
- * <h2>AsyncTask's generic types</h2>
- * <p>The three types used by an asynchronous task are the following:</p>
- * <ol>
- *     <li><code>Params</code>, the type of the parameters sent to the task upon
- *     execution.</li>
- *     <li><code>Progress</code>, the type of the progress units published during
- *     the background computation.</li>
- *     <li><code>Result</code>, the type of the result of the background
- *     computation.</li>
- * </ol>
- * <p>Not all types are always used by am asynchronous task. To mark a type as unused,
- * simply use the type {@link Void}:</p>
- * <pre>
- * private class MyTask extends AsyncTask<Void, Void, Void) { ... }
- * </pre>
- *
- * <h2>The 4 steps</h2>
- * <p>When an asynchronous task is executed, the task goes through 4 steps:</p>
- * <ol>
- *     <li>{@link #onPreExecute()}, invoked on the UI thread immediately after the task
- *     is executed. This step is normally used to setup the task, for instance by
- *     showing a progress bar in the user interface.</li>
- *     <li>{@link #doInBackground}, invoked on the background thread
- *     immediately after {@link #onPreExecute()} finishes executing. This step is used
- *     to perform background computation that can take a long time. The parameters
- *     of the asynchronous task are passed to this step. The result of the computation must
- *     be returned by this step and will be passed back to the last step. This step
- *     can also use {@link #publishProgress} to publish one or more units
- *     of progress. These values are published on the UI thread, in the
- *     {@link #onProgressUpdate} step.</li>
- *     <li>{@link #onProgressUpdate}, invoked on the UI thread after a
- *     call to {@link #publishProgress}. The timing of the execution is
- *     undefined. This method is used to display any form of progress in the user
- *     interface while the background computation is still executing. For instance,
- *     it can be used to animate a progress bar or show logs in a text field.</li>
- *     <li>{@link #onPostExecute}, invoked on the UI thread after the background
- *     computation finishes. The result of the background computation is passed to
- *     this step as a parameter.</li>
- * </ol>
- *
- * <h2>Threading rules</h2>
- * <p>There are a few threading rules that must be followed for this class to
- * work properly:</p>
- * <ul>
- *     <li>The task instance must be created on the UI thread.</li>
- *     <li>{@link #execute} must be invoked on the UI thread.</li>
- *     <li>Do not call {@link #onPreExecute()}, {@link #onPostExecute},
- *     {@link #doInBackground}, {@link #onProgressUpdate} manually.</li>
- *     <li>The task can be executed only once (an exception will be thrown if
- *     a second execution is attempted.)</li>
- * </ul>
- */
-public abstract class AsyncTask<Params, Progress, Result> {
-    private static final String LOG_TAG = "AsyncTask";
-
-    private static final int CORE_POOL_SIZE = 1;
-    private static final int MAXIMUM_POOL_SIZE = 10;
-    private static final int KEEP_ALIVE = 10;
-
-    private static final BlockingQueue<Runnable> sWorkQueue =
-            new LinkedBlockingQueue<Runnable>(MAXIMUM_POOL_SIZE);
-
-    private static final ThreadFactory sThreadFactory = new ThreadFactory() {
-        private final AtomicInteger mCount = new AtomicInteger(1);
-
-        public Thread newThread(Runnable r) {
-            return new Thread(r, "AsyncTask #" + mCount.getAndIncrement());
-        }
-    };
-
-    private static final ThreadPoolExecutor sExecutor = new ThreadPoolExecutor(CORE_POOL_SIZE,
-            MAXIMUM_POOL_SIZE, KEEP_ALIVE, TimeUnit.SECONDS, sWorkQueue, sThreadFactory);
-
-    private static final int MESSAGE_POST_RESULT = 0x1;
-    private static final int MESSAGE_POST_PROGRESS = 0x2;
-    private static final int MESSAGE_POST_CANCEL = 0x3;
-
-    private static final InternalHandler sHandler = new InternalHandler();
-
-    private final WorkerRunnable<Params, Result> mWorker;
-    private final FutureTask<Result> mFuture;
-
-    private volatile Status mStatus = Status.PENDING;
-
-    /**
-     * Indicates the current status of the task. Each status will be set only once
-     * during the lifetime of a task.
-     */
-    public enum Status {
-        /**
-         * Indicates that the task has not been executed yet.
-         */
-        PENDING,
-        /**
-         * Indicates that the task is running.
-         */
-        RUNNING,
-        /**
-         * Indicates that {@link AsyncTask#onPostExecute} has finished.
-         */
-        FINISHED,
-    }
-
-    /**
-     * Creates a new asynchronous task. This constructor must be invoked on the UI thread.
-     */
-    public AsyncTask() {
-        mWorker = new WorkerRunnable<Params, Result>() {
-            public Result call() throws Exception {
-                Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
-                return doInBackground(mParams);
-            }
-        };
-
-        mFuture = new FutureTask<Result>(mWorker) {
-            @Override
-            protected void done() {
-                Message message;
-                Result result = null;
-
-                try {
-                    result = get();
-                } catch (InterruptedException e) {
-                    android.util.Log.w(LOG_TAG, e);
-                } catch (ExecutionException e) {
-                    throw new RuntimeException("An error occured while executing doInBackground()",
-                            e.getCause());
-                } catch (CancellationException e) {
-                    message = sHandler.obtainMessage(MESSAGE_POST_CANCEL,
-                            new AsyncTaskResult<Result>(AsyncTask.this, (Result[]) null));
-                    message.sendToTarget();
-                    return;
-                } catch (Throwable t) {
-                    throw new RuntimeException("An error occured while executing "
-                            + "doInBackground()", t);
-                }
-
-                message = sHandler.obtainMessage(MESSAGE_POST_RESULT,
-                        new AsyncTaskResult<Result>(AsyncTask.this, result));
-                message.sendToTarget();
-            }
-        };
-    }
-
-    /**
-     * Returns the current status of this task.
-     *
-     * @return The current status.
-     */
-    public final Status getStatus() {
-        return mStatus;
-    }
-
-    /**
-     * Override this method to perform a computation on a background thread. The
-     * specified parameters are the parameters passed to {@link #execute}
-     * by the caller of this task.
-     *
-     * This method can call {@link #publishProgress} to publish updates
-     * on the UI thread.
-     *
-     * @param params The parameters of the task.
-     *
-     * @return A result, defined by the subclass of this task.
-     *
-     * @see #onPreExecute()
-     * @see #onPostExecute
-     * @see #publishProgress
-     */
-    protected abstract Result doInBackground(Params... params);
-
-    /**
-     * Runs on the UI thread before {@link #doInBackground}.
-     *
-     * @see #onPostExecute
-     * @see #doInBackground
-     */
-    protected void onPreExecute() {
-    }
-
-    /**
-     * Runs on the UI thread after {@link #doInBackground}. The
-     * specified result is the value returned by {@link #doInBackground}
-     * or null if the task was cancelled or an exception occured.
-     *
-     * @param result The result of the operation computed by {@link #doInBackground}.
-     *
-     * @see #onPreExecute
-     * @see #doInBackground
-     */
-    @SuppressWarnings({"UnusedDeclaration"})
-    protected void onPostExecute(Result result) {
-    }
-
-    /**
-     * Runs on the UI thread after {@link #publishProgress} is invoked.
-     * The specified values are the values passed to {@link #publishProgress}.
-     *
-     * @param values The values indicating progress.
-     *
-     * @see #publishProgress
-     * @see #doInBackground
-     */
-    @SuppressWarnings({"UnusedDeclaration"})
-    protected void onProgressUpdate(Progress... values) {
-    }
-
-    /**
-     * Runs on the UI thread after {@link #cancel(boolean)} is invoked.
-     *
-     * @see #cancel(boolean)
-     * @see #isCancelled()
-     */
-    protected void onCancelled() {
-    }
-
-    /**
-     * Returns <tt>true</tt> if this task was cancelled before it completed
-     * normally.
-     *
-     * @return <tt>true</tt> if task was cancelled before it completed
-     *
-     * @see #cancel(boolean)
-     */
-    public final boolean isCancelled() {
-        return mFuture.isCancelled();
-    }
-
-    /**
-     * Attempts to cancel execution of this task.  This attempt will
-     * fail if the task has already completed, already been cancelled,
-     * or could not be cancelled for some other reason. If successful,
-     * and this task has not started when <tt>cancel</tt> is called,
-     * this task should never run.  If the task has already started,
-     * then the <tt>mayInterruptIfRunning</tt> parameter determines
-     * whether the thread executing this task should be interrupted in
-     * an attempt to stop the task.
-     *
-     * @param mayInterruptIfRunning <tt>true</tt> if the thread executing this
-     *        task should be interrupted; otherwise, in-progress tasks are allowed
-     *        to complete.
-     *
-     * @return <tt>false</tt> if the task could not be cancelled,
-     *         typically because it has already completed normally;
-     *         <tt>true</tt> otherwise
-     *
-     * @see #isCancelled()
-     * @see #onCancelled()
-     */
-    public final boolean cancel(boolean mayInterruptIfRunning) {
-        return mFuture.cancel(mayInterruptIfRunning);
-    }
-
-    /**
-     * Waits if necessary for the computation to complete, and then
-     * retrieves its result.
-     *
-     * @return The computed result.
-     *
-     * @throws CancellationException If the computation was cancelled.
-     * @throws ExecutionException If the computation threw an exception.
-     * @throws InterruptedException If the current thread was interrupted
-     *         while waiting.
-     */
-    public final Result get() throws InterruptedException, ExecutionException {
-        return mFuture.get();
-    }
-
-    /**
-     * Waits if necessary for at most the given time for the computation
-     * to complete, and then retrieves its result.
-     *
-     * @param timeout Time to wait before cancelling the operation.
-     * @param unit The time unit for the timeout.
-     *
-     * @return The computed result.
-     *
-     * @throws CancellationException If the computation was cancelled.
-     * @throws ExecutionException If the computation threw an exception.
-     * @throws InterruptedException If the current thread was interrupted
-     *         while waiting.
-     * @throws TimeoutException If the wait timed out.
-     */
-    public final Result get(long timeout, TimeUnit unit) throws InterruptedException,
-            ExecutionException, TimeoutException {
-        return mFuture.get(timeout, unit);
-    }
-
-    /**
-     * Executes the task with the specified parameters. The task returns
-     * itself (this) so that the caller can keep a reference to it.
-     *
-     * This method must be invoked on the UI thread.
-     *
-     * @param params The parameters of the task.
-     *
-     * @return This instance of AsyncTask.
-     *
-     * @throws IllegalStateException If {@link #getStatus()} returns either
-     *         {@link AsyncTask.Status#RUNNING} or {@link AsyncTask.Status#FINISHED}.
-     */
-    public final AsyncTask<Params, Progress, Result> execute(Params... params) {
-        if (mStatus != Status.PENDING) {
-            switch (mStatus) {
-                case RUNNING:
-                    throw new IllegalStateException("Cannot execute task:"
-                            + " the task is already running.");
-                case FINISHED:
-                    throw new IllegalStateException("Cannot execute task:"
-                            + " the task has already been executed "
-                            + "(a task can be executed only once)");
-            }
-        }
-
-        mStatus = Status.RUNNING;
-
-        onPreExecute();
-
-        mWorker.mParams = params;
-        sExecutor.execute(mFuture);
-
-        return this;
-    }
-
-    /**
-     * This method can be invoked from {@link #doInBackground} to
-     * publish updates on the UI thread while the background computation is
-     * still running. Each call to this method will trigger the execution of
-     * {@link #onProgressUpdate} on the UI thread.
-     *
-     * @param values The progress values to update the UI with.
-     *
-     * @see #onProgressUpdate
-     * @see #doInBackground
-     */
-    protected final void publishProgress(Progress... values) {
-        sHandler.obtainMessage(MESSAGE_POST_PROGRESS,
-                new AsyncTaskResult<Progress>(this, values)).sendToTarget();
-    }
-
-    private void finish(Result result) {
-        onPostExecute(result);
-        mStatus = Status.FINISHED;
-    }
-
-    private static class InternalHandler extends Handler {
-        @SuppressWarnings({"unchecked", "RawUseOfParameterizedType"})
-        @Override
-        public void handleMessage(Message msg) {
-            AsyncTaskResult result = (AsyncTaskResult) msg.obj;
-            switch (msg.what) {
-                case MESSAGE_POST_RESULT:
-                    // There is only one result
-                    result.mTask.finish(result.mData[0]);
-                    break;
-                case MESSAGE_POST_PROGRESS:
-                    result.mTask.onProgressUpdate(result.mData);
-                    break;
-                case MESSAGE_POST_CANCEL:
-                    result.mTask.onCancelled();
-                    break;
-            }
-        }
-    }
-
-    private static abstract class WorkerRunnable<Params, Result> implements Callable<Result> {
-        Params[] mParams;
-    }
-
-    @SuppressWarnings({"RawUseOfParameterizedType"})
-    private static class AsyncTaskResult<Data> {
-        final AsyncTask mTask;
-        final Data[] mData;
-
-        AsyncTaskResult(AsyncTask task, Data... data) {
-            mTask = task;
-            mData = data;
-        }
-    }
-}