| /* |
| * Copyright (C) 2009 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.content; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.content.res.AssetFileDescriptor; |
| import android.database.Cursor; |
| import android.net.Uri; |
| import android.os.Bundle; |
| import android.os.CancellationSignal; |
| import android.os.DeadObjectException; |
| import android.os.Handler; |
| import android.os.ICancellationSignal; |
| import android.os.Looper; |
| import android.os.ParcelFileDescriptor; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.util.Preconditions; |
| |
| import dalvik.system.CloseGuard; |
| |
| import java.io.FileNotFoundException; |
| import java.util.ArrayList; |
| |
| /** |
| * The public interface object used to interact with a {@link ContentProvider}. This is obtained by |
| * calling {@link ContentResolver#acquireContentProviderClient}. This object must be released |
| * using {@link #release} in order to indicate to the system that the {@link ContentProvider} is |
| * no longer needed and can be killed to free up resources. |
| * |
| * <p>Note that you should generally create a new ContentProviderClient instance |
| * for each thread that will be performing operations. Unlike |
| * {@link ContentResolver}, the methods here such as {@link #query} and |
| * {@link #openFile} are not thread safe -- you must not call |
| * {@link #release()} on the ContentProviderClient those calls are made from |
| * until you are finished with the data they have returned. |
| */ |
| public class ContentProviderClient { |
| private static final String TAG = "ContentProviderClient"; |
| |
| @GuardedBy("ContentProviderClient.class") |
| private static Handler sAnrHandler; |
| |
| private final ContentResolver mContentResolver; |
| private final IContentProvider mContentProvider; |
| private final String mPackageName; |
| private final boolean mStable; |
| |
| private final CloseGuard mGuard = CloseGuard.get(); |
| |
| private long mAnrTimeout; |
| private NotRespondingRunnable mAnrRunnable; |
| |
| private boolean mReleased; |
| |
| /** {@hide} */ |
| ContentProviderClient( |
| ContentResolver contentResolver, IContentProvider contentProvider, boolean stable) { |
| mContentResolver = contentResolver; |
| mContentProvider = contentProvider; |
| mPackageName = contentResolver.mPackageName; |
| mStable = stable; |
| |
| mGuard.open("release"); |
| } |
| |
| /** {@hide} */ |
| public void setDetectNotResponding(long timeoutMillis) { |
| synchronized (ContentProviderClient.class) { |
| mAnrTimeout = timeoutMillis; |
| |
| if (timeoutMillis > 0) { |
| if (mAnrRunnable == null) { |
| mAnrRunnable = new NotRespondingRunnable(); |
| } |
| if (sAnrHandler == null) { |
| sAnrHandler = new Handler(Looper.getMainLooper(), null, true /* async */); |
| } |
| } else { |
| mAnrRunnable = null; |
| } |
| } |
| } |
| |
| private void beforeRemote() { |
| if (mAnrRunnable != null) { |
| sAnrHandler.postDelayed(mAnrRunnable, mAnrTimeout); |
| } |
| } |
| |
| private void afterRemote() { |
| if (mAnrRunnable != null) { |
| sAnrHandler.removeCallbacks(mAnrRunnable); |
| } |
| } |
| |
| /** See {@link ContentProvider#query ContentProvider.query} */ |
| public @Nullable Cursor query(@NonNull Uri url, @Nullable String[] projection, |
| @Nullable String selection, @Nullable String[] selectionArgs, |
| @Nullable String sortOrder) throws RemoteException { |
| return query(url, projection, selection, selectionArgs, sortOrder, null); |
| } |
| |
| /** See {@link ContentProvider#query ContentProvider.query} */ |
| public @Nullable Cursor query(@NonNull Uri url, @Nullable String[] projection, |
| @Nullable String selection, @Nullable String[] selectionArgs, |
| @Nullable String sortOrder, @Nullable CancellationSignal cancellationSignal) |
| throws RemoteException { |
| Preconditions.checkNotNull(url, "url"); |
| |
| beforeRemote(); |
| try { |
| ICancellationSignal remoteCancellationSignal = null; |
| if (cancellationSignal != null) { |
| cancellationSignal.throwIfCanceled(); |
| remoteCancellationSignal = mContentProvider.createCancellationSignal(); |
| cancellationSignal.setRemote(remoteCancellationSignal); |
| } |
| return mContentProvider.query(mPackageName, url, projection, selection, selectionArgs, |
| sortOrder, remoteCancellationSignal); |
| } catch (DeadObjectException e) { |
| if (!mStable) { |
| mContentResolver.unstableProviderDied(mContentProvider); |
| } |
| throw e; |
| } finally { |
| afterRemote(); |
| } |
| } |
| |
| /** See {@link ContentProvider#getType ContentProvider.getType} */ |
| public @Nullable String getType(@NonNull Uri url) throws RemoteException { |
| Preconditions.checkNotNull(url, "url"); |
| |
| beforeRemote(); |
| try { |
| return mContentProvider.getType(url); |
| } catch (DeadObjectException e) { |
| if (!mStable) { |
| mContentResolver.unstableProviderDied(mContentProvider); |
| } |
| throw e; |
| } finally { |
| afterRemote(); |
| } |
| } |
| |
| /** See {@link ContentProvider#getStreamTypes ContentProvider.getStreamTypes} */ |
| public @Nullable String[] getStreamTypes(@NonNull Uri url, @NonNull String mimeTypeFilter) |
| throws RemoteException { |
| Preconditions.checkNotNull(url, "url"); |
| Preconditions.checkNotNull(mimeTypeFilter, "mimeTypeFilter"); |
| |
| beforeRemote(); |
| try { |
| return mContentProvider.getStreamTypes(url, mimeTypeFilter); |
| } catch (DeadObjectException e) { |
| if (!mStable) { |
| mContentResolver.unstableProviderDied(mContentProvider); |
| } |
| throw e; |
| } finally { |
| afterRemote(); |
| } |
| } |
| |
| /** See {@link ContentProvider#canonicalize} */ |
| public final @Nullable Uri canonicalize(@NonNull Uri url) throws RemoteException { |
| Preconditions.checkNotNull(url, "url"); |
| |
| beforeRemote(); |
| try { |
| return mContentProvider.canonicalize(mPackageName, url); |
| } catch (DeadObjectException e) { |
| if (!mStable) { |
| mContentResolver.unstableProviderDied(mContentProvider); |
| } |
| throw e; |
| } finally { |
| afterRemote(); |
| } |
| } |
| |
| /** See {@link ContentProvider#uncanonicalize} */ |
| public final @Nullable Uri uncanonicalize(@NonNull Uri url) throws RemoteException { |
| Preconditions.checkNotNull(url, "url"); |
| |
| beforeRemote(); |
| try { |
| return mContentProvider.uncanonicalize(mPackageName, url); |
| } catch (DeadObjectException e) { |
| if (!mStable) { |
| mContentResolver.unstableProviderDied(mContentProvider); |
| } |
| throw e; |
| } finally { |
| afterRemote(); |
| } |
| } |
| |
| /** See {@link ContentProvider#insert ContentProvider.insert} */ |
| public @Nullable Uri insert(@NonNull Uri url, @Nullable ContentValues initialValues) |
| throws RemoteException { |
| Preconditions.checkNotNull(url, "url"); |
| |
| beforeRemote(); |
| try { |
| return mContentProvider.insert(mPackageName, url, initialValues); |
| } catch (DeadObjectException e) { |
| if (!mStable) { |
| mContentResolver.unstableProviderDied(mContentProvider); |
| } |
| throw e; |
| } finally { |
| afterRemote(); |
| } |
| } |
| |
| /** See {@link ContentProvider#bulkInsert ContentProvider.bulkInsert} */ |
| public int bulkInsert(@NonNull Uri url, @NonNull ContentValues[] initialValues) |
| throws RemoteException { |
| Preconditions.checkNotNull(url, "url"); |
| Preconditions.checkNotNull(initialValues, "initialValues"); |
| |
| beforeRemote(); |
| try { |
| return mContentProvider.bulkInsert(mPackageName, url, initialValues); |
| } catch (DeadObjectException e) { |
| if (!mStable) { |
| mContentResolver.unstableProviderDied(mContentProvider); |
| } |
| throw e; |
| } finally { |
| afterRemote(); |
| } |
| } |
| |
| /** See {@link ContentProvider#delete ContentProvider.delete} */ |
| public int delete(@NonNull Uri url, @Nullable String selection, |
| @Nullable String[] selectionArgs) throws RemoteException { |
| Preconditions.checkNotNull(url, "url"); |
| |
| beforeRemote(); |
| try { |
| return mContentProvider.delete(mPackageName, url, selection, selectionArgs); |
| } catch (DeadObjectException e) { |
| if (!mStable) { |
| mContentResolver.unstableProviderDied(mContentProvider); |
| } |
| throw e; |
| } finally { |
| afterRemote(); |
| } |
| } |
| |
| /** See {@link ContentProvider#update ContentProvider.update} */ |
| public int update(@NonNull Uri url, @Nullable ContentValues values, @Nullable String selection, |
| @Nullable String[] selectionArgs) throws RemoteException { |
| Preconditions.checkNotNull(url, "url"); |
| |
| beforeRemote(); |
| try { |
| return mContentProvider.update(mPackageName, url, values, selection, selectionArgs); |
| } catch (DeadObjectException e) { |
| if (!mStable) { |
| mContentResolver.unstableProviderDied(mContentProvider); |
| } |
| throw e; |
| } finally { |
| afterRemote(); |
| } |
| } |
| |
| /** |
| * See {@link ContentProvider#openFile ContentProvider.openFile}. Note that |
| * this <em>does not</em> |
| * take care of non-content: URIs such as file:. It is strongly recommended |
| * you use the {@link ContentResolver#openFileDescriptor |
| * ContentResolver.openFileDescriptor} API instead. |
| */ |
| public @Nullable ParcelFileDescriptor openFile(@NonNull Uri url, @NonNull String mode) |
| throws RemoteException, FileNotFoundException { |
| return openFile(url, mode, null); |
| } |
| |
| /** |
| * See {@link ContentProvider#openFile ContentProvider.openFile}. Note that |
| * this <em>does not</em> |
| * take care of non-content: URIs such as file:. It is strongly recommended |
| * you use the {@link ContentResolver#openFileDescriptor |
| * ContentResolver.openFileDescriptor} API instead. |
| */ |
| public @Nullable ParcelFileDescriptor openFile(@NonNull Uri url, @NonNull String mode, |
| @Nullable CancellationSignal signal) throws RemoteException, FileNotFoundException { |
| Preconditions.checkNotNull(url, "url"); |
| Preconditions.checkNotNull(mode, "mode"); |
| |
| beforeRemote(); |
| try { |
| ICancellationSignal remoteSignal = null; |
| if (signal != null) { |
| signal.throwIfCanceled(); |
| remoteSignal = mContentProvider.createCancellationSignal(); |
| signal.setRemote(remoteSignal); |
| } |
| return mContentProvider.openFile(mPackageName, url, mode, remoteSignal, null); |
| } catch (DeadObjectException e) { |
| if (!mStable) { |
| mContentResolver.unstableProviderDied(mContentProvider); |
| } |
| throw e; |
| } finally { |
| afterRemote(); |
| } |
| } |
| |
| /** |
| * See {@link ContentProvider#openAssetFile ContentProvider.openAssetFile}. |
| * Note that this <em>does not</em> |
| * take care of non-content: URIs such as file:. It is strongly recommended |
| * you use the {@link ContentResolver#openAssetFileDescriptor |
| * ContentResolver.openAssetFileDescriptor} API instead. |
| */ |
| public @Nullable AssetFileDescriptor openAssetFile(@NonNull Uri url, @NonNull String mode) |
| throws RemoteException, FileNotFoundException { |
| return openAssetFile(url, mode, null); |
| } |
| |
| /** |
| * See {@link ContentProvider#openAssetFile ContentProvider.openAssetFile}. |
| * Note that this <em>does not</em> |
| * take care of non-content: URIs such as file:. It is strongly recommended |
| * you use the {@link ContentResolver#openAssetFileDescriptor |
| * ContentResolver.openAssetFileDescriptor} API instead. |
| */ |
| public @Nullable AssetFileDescriptor openAssetFile(@NonNull Uri url, @NonNull String mode, |
| @Nullable CancellationSignal signal) throws RemoteException, FileNotFoundException { |
| Preconditions.checkNotNull(url, "url"); |
| Preconditions.checkNotNull(mode, "mode"); |
| |
| beforeRemote(); |
| try { |
| ICancellationSignal remoteSignal = null; |
| if (signal != null) { |
| signal.throwIfCanceled(); |
| remoteSignal = mContentProvider.createCancellationSignal(); |
| signal.setRemote(remoteSignal); |
| } |
| return mContentProvider.openAssetFile(mPackageName, url, mode, remoteSignal); |
| } catch (DeadObjectException e) { |
| if (!mStable) { |
| mContentResolver.unstableProviderDied(mContentProvider); |
| } |
| throw e; |
| } finally { |
| afterRemote(); |
| } |
| } |
| |
| /** See {@link ContentProvider#openTypedAssetFile ContentProvider.openTypedAssetFile} */ |
| public final @Nullable AssetFileDescriptor openTypedAssetFileDescriptor(@NonNull Uri uri, |
| @NonNull String mimeType, @Nullable Bundle opts) |
| throws RemoteException, FileNotFoundException { |
| return openTypedAssetFileDescriptor(uri, mimeType, opts, null); |
| } |
| |
| /** See {@link ContentProvider#openTypedAssetFile ContentProvider.openTypedAssetFile} */ |
| public final @Nullable AssetFileDescriptor openTypedAssetFileDescriptor(@NonNull Uri uri, |
| @NonNull String mimeType, @Nullable Bundle opts, @Nullable CancellationSignal signal) |
| throws RemoteException, FileNotFoundException { |
| Preconditions.checkNotNull(uri, "uri"); |
| Preconditions.checkNotNull(mimeType, "mimeType"); |
| |
| beforeRemote(); |
| try { |
| ICancellationSignal remoteSignal = null; |
| if (signal != null) { |
| signal.throwIfCanceled(); |
| remoteSignal = mContentProvider.createCancellationSignal(); |
| signal.setRemote(remoteSignal); |
| } |
| return mContentProvider.openTypedAssetFile( |
| mPackageName, uri, mimeType, opts, remoteSignal); |
| } catch (DeadObjectException e) { |
| if (!mStable) { |
| mContentResolver.unstableProviderDied(mContentProvider); |
| } |
| throw e; |
| } finally { |
| afterRemote(); |
| } |
| } |
| |
| /** See {@link ContentProvider#applyBatch ContentProvider.applyBatch} */ |
| public @NonNull ContentProviderResult[] applyBatch( |
| @NonNull ArrayList<ContentProviderOperation> operations) |
| throws RemoteException, OperationApplicationException { |
| Preconditions.checkNotNull(operations, "operations"); |
| |
| beforeRemote(); |
| try { |
| return mContentProvider.applyBatch(mPackageName, operations); |
| } catch (DeadObjectException e) { |
| if (!mStable) { |
| mContentResolver.unstableProviderDied(mContentProvider); |
| } |
| throw e; |
| } finally { |
| afterRemote(); |
| } |
| } |
| |
| /** See {@link ContentProvider#call(String, String, Bundle)} */ |
| public @Nullable Bundle call(@NonNull String method, @Nullable String arg, |
| @Nullable Bundle extras) throws RemoteException { |
| Preconditions.checkNotNull(method, "method"); |
| |
| beforeRemote(); |
| try { |
| return mContentProvider.call(mPackageName, method, arg, extras); |
| } catch (DeadObjectException e) { |
| if (!mStable) { |
| mContentResolver.unstableProviderDied(mContentProvider); |
| } |
| throw e; |
| } finally { |
| afterRemote(); |
| } |
| } |
| |
| /** |
| * Call this to indicate to the system that the associated {@link ContentProvider} is no |
| * longer needed by this {@link ContentProviderClient}. |
| * @return true if this was release, false if it was already released |
| */ |
| public boolean release() { |
| synchronized (this) { |
| if (mReleased) { |
| throw new IllegalStateException("Already released"); |
| } |
| mReleased = true; |
| mGuard.close(); |
| if (mStable) { |
| return mContentResolver.releaseProvider(mContentProvider); |
| } else { |
| return mContentResolver.releaseUnstableProvider(mContentProvider); |
| } |
| } |
| } |
| |
| @Override |
| protected void finalize() throws Throwable { |
| if (mGuard != null) { |
| mGuard.warnIfOpen(); |
| } |
| } |
| |
| /** |
| * Get a reference to the {@link ContentProvider} that is associated with this |
| * client. If the {@link ContentProvider} is running in a different process then |
| * null will be returned. This can be used if you know you are running in the same |
| * process as a provider, and want to get direct access to its implementation details. |
| * |
| * @return If the associated {@link ContentProvider} is local, returns it. |
| * Otherwise returns null. |
| */ |
| public @Nullable ContentProvider getLocalContentProvider() { |
| return ContentProvider.coerceToLocalContentProvider(mContentProvider); |
| } |
| |
| /** {@hide} */ |
| public static void releaseQuietly(ContentProviderClient client) { |
| if (client != null) { |
| try { |
| client.release(); |
| } catch (Exception ignored) { |
| } |
| } |
| } |
| |
| private class NotRespondingRunnable implements Runnable { |
| @Override |
| public void run() { |
| Log.w(TAG, "Detected provider not responding: " + mContentProvider); |
| mContentResolver.appNotRespondingViaProvider(mContentProvider); |
| } |
| } |
| } |