1 /* 2 * Copyright (C) 2017 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 com.android.apksig.internal.util; 18 19 import java.io.ByteArrayOutputStream; 20 import java.io.IOException; 21 import java.io.InputStream; 22 23 /** 24 * Utilities for byte arrays and I/O streams. 25 */ 26 public final class ByteStreams { ByteStreams()27 private ByteStreams() {} 28 29 /** 30 * Returns the data remaining in the provided input stream as a byte array 31 */ toByteArray(InputStream in)32 public static byte[] toByteArray(InputStream in) throws IOException { 33 ByteArrayOutputStream result = new ByteArrayOutputStream(); 34 byte[] buf = new byte[16384]; 35 int chunkSize; 36 while ((chunkSize = in.read(buf)) != -1) { 37 result.write(buf, 0, chunkSize); 38 } 39 return result.toByteArray(); 40 } 41 } 42