| /* |
| * Copyright (C) 2012 Google Inc. |
| * Licensed to 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.mail.utils; |
| |
| import android.content.ContentProvider; |
| import android.content.ContentProviderOperation; |
| import android.content.ContentProviderResult; |
| import android.content.ContentResolver; |
| import android.content.ContentValues; |
| import android.net.Uri; |
| import android.os.AsyncTask; |
| |
| import com.google.common.collect.Lists; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * Simple utility class to make an asynchronous {@link ContentProvider} request expressed as |
| * a list of {@link ContentProviderOperation}s. As with all {@link AsyncTask}s, subclasses should |
| * override {@link #onPostExecute(Object)} to handle success/failure. |
| * |
| * @see InsertTask |
| * @see UpdateTask |
| * @see DeleteTask |
| * |
| */ |
| public class ContentProviderTask extends AsyncTask<Void, Void, ContentProviderTask.Result> { |
| |
| private ContentResolver mResolver; |
| private String mAuthority; |
| private ArrayList<ContentProviderOperation> mOps; |
| |
| private static final String LOG_TAG = LogTag.getLogTag(); |
| |
| public static class Result { |
| public final Exception exception; |
| public final ContentProviderResult[] results; |
| |
| /** |
| * Create a new result. |
| * @param exception |
| * @param results |
| */ |
| private Result(Exception exception, ContentProviderResult[] results) { |
| this.exception = exception; |
| this.results = results; |
| } |
| |
| /** |
| * Create a new success result. |
| * @param success |
| * @return |
| */ |
| private static Result newSuccess(ContentProviderResult[] success) { |
| return new Result(null, success); |
| } |
| |
| /** |
| * Create a new failure result. |
| * @param failure |
| */ |
| private static Result newFailure(Exception failure) { |
| return new Result(failure, null); |
| } |
| } |
| |
| @Override |
| protected Result doInBackground(Void... params) { |
| Result result; |
| try { |
| result = Result.newSuccess(mResolver.applyBatch(mAuthority, mOps)); |
| } catch (Exception e) { |
| LogUtils.w(LOG_TAG, e, "exception executing ContentProviderOperationsTask"); |
| result = Result.newFailure(e); |
| } |
| return result; |
| } |
| |
| public void run(ContentResolver resolver, String authority, |
| ArrayList<ContentProviderOperation> ops) { |
| mResolver = resolver; |
| mAuthority = authority; |
| mOps = ops; |
| executeOnExecutor(THREAD_POOL_EXECUTOR, (Void) null); |
| } |
| |
| public static class InsertTask extends ContentProviderTask { |
| |
| public void run(ContentResolver resolver, Uri uri, ContentValues values) { |
| final ContentProviderOperation op = ContentProviderOperation |
| .newInsert(uri) |
| .withValues(values) |
| .build(); |
| super.run(resolver, uri.getAuthority(), Lists.newArrayList(op)); |
| } |
| |
| } |
| |
| public static class UpdateTask extends ContentProviderTask { |
| |
| public void run(ContentResolver resolver, Uri uri, ContentValues values, |
| String selection, String[] selectionArgs) { |
| final ContentProviderOperation op = ContentProviderOperation |
| .newUpdate(uri) |
| .withValues(values) |
| .withSelection(selection, selectionArgs) |
| .build(); |
| super.run(resolver, uri.getAuthority(), Lists.newArrayList(op)); |
| } |
| |
| } |
| |
| public static class DeleteTask extends ContentProviderTask { |
| |
| public void run(ContentResolver resolver, Uri uri, String selection, |
| String[] selectionArgs) { |
| final ContentProviderOperation op = ContentProviderOperation |
| .newDelete(uri) |
| .withSelection(selection, selectionArgs) |
| .build(); |
| super.run(resolver, uri.getAuthority(), Lists.newArrayList(op)); |
| } |
| |
| } |
| |
| } |