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 */ 29 30 import java.io.*; 31 import java.util.*; 32 33 public class LongString { 34 public static void main(String[] args) throws Exception { 35 Random rand = new Random(System.currentTimeMillis()); 36 ByteArrayOutputStream bout; 37 ByteArrayInputStream bin; 38 ObjectOutputStream oout; 39 ObjectInputStream oin; 40 FileInputStream fin; 41 File mesgf; 42 43 // generate a long random string 44 StringBuffer sbuf = new StringBuffer(); 45 for (int i = 0; i < 100000; i++) 46 sbuf.append((char) rand.nextInt(Character.MAX_VALUE + 1)); 47 String str = sbuf.toString(); 48 49 // write and read long string 50 bout = new ByteArrayOutputStream(); 51 oout = new ObjectOutputStream(bout); 52 oout.writeObject(str); 53 oout.flush(); 54 bin = new ByteArrayInputStream(bout.toByteArray()); 55 oin = new ObjectInputStream(bin); 56 String strcopy = (String) oin.readObject(); 57 if (! str.equals(strcopy)) 58 throw new Error("deserialized long string not equal to original"); 59 60 // test backwards compatibility 61 String mesg = "Message in golden file"; 62 bout = new ByteArrayOutputStream(); 63 oout = new ObjectOutputStream(bout); 64 oout.writeObject(mesg); 65 oout.flush(); 66 byte[] buf1 = bout.toByteArray(); 67 68 mesgf = new File(System.getProperty("test.src", "."), "mesg.ser"); 69 fin = new FileInputStream(mesgf); 70 bout = new ByteArrayOutputStream(); 71 try { 72 while (fin.available() > 0) 73 bout.write(fin.read()); 74 } finally { 75 fin.close(); 76 } 77 byte[] buf2 = bout.toByteArray(); 78 79 if (! Arrays.equals(buf1, buf2)) 80 throw new Error("incompatible string format (write)"); 81 82 fin = new FileInputStream(mesgf); 83 try { 84 oin = new ObjectInputStream(fin); 85 String mesgcopy = (String) oin.readObject(); 86 if (! mesg.equals(mesgcopy)) 87 throw new Error("incompatible string format (read)"); 88 } finally { 89 fin.close(); 90 } 91 } 92 }