1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package jdk.internal.io; 26 27 import java.io.InputStream; 28 import java.io.IOException; 29 import java.io.OutputStream; 30 import java.util.ArrayList; 31 import java.util.Arrays; 32 33 /** 34 * Utility methods data input and output. 35 */ 36 public class IOSupport { 37 // buffer size used for reading and writing 38 private static final int DEFAULT_BUFFER_SIZE = 8192; 39 40 /** 41 * Reads all bytes from an input stream and writes them to an output stream. 42 */ 43 public static long copy(InputStream source, OutputStream sink) 44 throws IOException 45 { 46 return copy(source, sink, DEFAULT_BUFFER_SIZE); 47 } 48 49 public static long copy(InputStream source, OutputStream sink, 50 int bufferSize) throws IOException 51 { 52 long nread = 0L; 53 byte[] buf = new byte[bufferSize]; 54 int n; 55 while ((n = source.read(buf)) >= 0) { 56 sink.write(buf, 0, n); 57 nread += n; 58 } 59 return nread; 60 } 61 }