1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package libcore.io; 18 19 import java.io.ByteArrayOutputStream; 20 import java.io.IOException; 21 import java.io.InputStream; 22 import java.io.OutputStream; 23 24 public final class Streams { 25 private Streams() {} 26 27 /** 28 * Returns a byte[] containing the remainder of 'in', closing it when done. 29 */ 30 public static byte[] readFully(InputStream in) throws IOException { 31 try { 32 return readFullyNoClose(in); 33 } finally { 34 in.close(); 35 } 36 } 37 38 /** 39 * Returns a byte[] containing the remainder of 'in'. 40 */ 41 private static byte[] readFullyNoClose(InputStream in) throws IOException { 42 ByteArrayOutputStream bytes = new ByteArrayOutputStream(); 43 byte[] buffer = new byte[1024]; 44 int count; 45 while ((count = in.read(buffer)) != -1) { 46 bytes.write(buffer, 0, count); 47 } 48 return bytes.toByteArray(); 49 } 50 51 /** 52 * Copies all of the bytes from {@code in} to {@code out}. Neither stream is closed. 53 * Returns the total number of bytes transferred. 54 */ 55 public static int copy(InputStream in, OutputStream out) throws IOException { 56 int total = 0; 57 byte[] buffer = new byte[8192]; 58 int c; 59 while ((c = in.read(buffer)) != -1) { 60 total += c; 61 out.write(buffer, 0, c); 62 } 63 return total; 64 } 65 } 66
