1 /* 2 * Copyright (c) 1999, 2010, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* @test 25 * @bug 4217676 26 * @summary Ensure that object streams support serialization of long strings 27 * (strings whose UTF representation > 64k in length) 28 * @key randomness 29 */ 30 31 import java.io.*; 32 import java.util.*; 33 34 public class LongString { 35 public static void main(String[] args) throws Exception { 36 Random rand = new Random(System.currentTimeMillis()); 37 ByteArrayOutputStream bout; 38 ByteArrayInputStream bin; 39 ObjectOutputStream oout; 40 ObjectInputStream oin; 41 FileInputStream fin; 42 File mesgf; 43 44 // generate a long random string 45 StringBuffer sbuf = new StringBuffer(); 46 for (int i = 0; i < 100000; i++) 47 sbuf.append((char) rand.nextInt(Character.MAX_VALUE + 1)); 48 String str = sbuf.toString(); 49 50 // write and read long string 51 bout = new ByteArrayOutputStream(); 52 oout = new ObjectOutputStream(bout); 53 oout.writeObject(str); 54 oout.flush(); 55 bin = new ByteArrayInputStream(bout.toByteArray()); 56 oin = new ObjectInputStream(bin); 57 String strcopy = (String) oin.readObject(); 58 if (! str.equals(strcopy)) 59 throw new Error("deserialized long string not equal to original"); 60 61 // test backwards compatibility 62 String mesg = "Message in golden file"; 63 bout = new ByteArrayOutputStream(); 64 oout = new ObjectOutputStream(bout); 65 oout.writeObject(mesg); 66 oout.flush(); 67 byte[] buf1 = bout.toByteArray(); 68 69 mesgf = new File(System.getProperty("test.src", "."), "mesg.ser"); 70 fin = new FileInputStream(mesgf); 71 bout = new ByteArrayOutputStream(); 72 try { 73 while (fin.available() > 0) 74 bout.write(fin.read()); 75 } finally { 76 fin.close(); 77 } 78 byte[] buf2 = bout.toByteArray(); 79 80 if (! Arrays.equals(buf1, buf2)) 81 throw new Error("incompatible string format (write)"); 82 83 fin = new FileInputStream(mesgf); 84 try { 85 oin = new ObjectInputStream(fin); 86 String mesgcopy = (String) oin.readObject(); 87 if (! mesg.equals(mesgcopy)) 88 throw new Error("incompatible string format (read)"); 89 } finally { 90 fin.close(); 91 } 92 } 93 }