| /* |
| * Copyright (C) 2020 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.utils.blob; |
| |
| import android.app.blob.BlobStoreManager; |
| import android.os.ParcelFileDescriptor; |
| |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| public class Utils { |
| public static final int BUFFER_SIZE_BYTES = 16 * 1024; |
| |
| public static void copy(InputStream in, OutputStream out, long lengthBytes) |
| throws IOException { |
| final byte[] buffer = new byte[BUFFER_SIZE_BYTES]; |
| long bytesWrittern = 0; |
| while (bytesWrittern < lengthBytes) { |
| final int toWrite = (bytesWrittern + buffer.length <= lengthBytes) |
| ? buffer.length : (int) (lengthBytes - bytesWrittern); |
| in.read(buffer, 0, toWrite); |
| out.write(buffer, 0, toWrite); |
| bytesWrittern += toWrite; |
| } |
| } |
| |
| public static void writeToSession(BlobStoreManager.Session session, ParcelFileDescriptor input, |
| long lengthBytes) throws IOException { |
| try (FileInputStream in = new ParcelFileDescriptor.AutoCloseInputStream(input)) { |
| writeToSession(session, in, 0, lengthBytes); |
| } |
| } |
| |
| public static void writeToSession(BlobStoreManager.Session session, FileInputStream in, |
| long offsetBytes, long lengthBytes) throws IOException { |
| in.getChannel().position(offsetBytes); |
| try (FileOutputStream out = new ParcelFileDescriptor.AutoCloseOutputStream( |
| session.openWrite(offsetBytes, lengthBytes))) { |
| copy(in, out, lengthBytes); |
| } |
| } |
| } |