J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1999 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* @test |
| 25 | * @bug 4228592 |
| 26 | * @summary Ensure that ObjectInputStream properly skips over block data when a |
| 27 | * class that defines readObject() or readExternal() fails to read all |
| 28 | * of the data written by the corresponding writeObject() or |
| 29 | * writeExternal() method. |
| 30 | */ |
| 31 | |
| 32 | import java.io.*; |
| 33 | |
| 34 | class MismatchedRead implements Serializable { |
| 35 | int i; |
| 36 | float f; |
| 37 | |
| 38 | MismatchedRead(int i, float f) { |
| 39 | this.i = i; |
| 40 | this.f = f; |
| 41 | } |
| 42 | |
| 43 | private void writeObject(ObjectOutputStream out) throws IOException { |
| 44 | out.writeInt(i); |
| 45 | out.writeFloat(f); |
| 46 | out.writeUTF("skip me"); |
| 47 | } |
| 48 | |
| 49 | private void readObject(ObjectInputStream in) |
| 50 | throws IOException, ClassNotFoundException |
| 51 | { |
| 52 | i = in.readInt(); |
| 53 | f = in.readFloat(); |
| 54 | } |
| 55 | |
| 56 | public boolean equals(Object obj) { |
| 57 | if (! (obj instanceof MismatchedRead)) |
| 58 | return false; |
| 59 | MismatchedRead other = (MismatchedRead) obj; |
| 60 | return (i == other.i && f == other.f); |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | class MismatchedReadExternal implements Externalizable { |
| 65 | int i; |
| 66 | float f; |
| 67 | |
| 68 | public MismatchedReadExternal() { |
| 69 | this(0, (float) 0.0); |
| 70 | } |
| 71 | |
| 72 | MismatchedReadExternal(int i, float f) { |
| 73 | this.i = i; |
| 74 | this.f = f; |
| 75 | } |
| 76 | |
| 77 | public void writeExternal(ObjectOutput out) throws IOException { |
| 78 | out.writeInt(i); |
| 79 | out.writeFloat(f); |
| 80 | out.writeUTF("skip another"); |
| 81 | } |
| 82 | |
| 83 | public void readExternal(ObjectInput in) throws IOException { |
| 84 | i = in.readInt(); |
| 85 | f = in.readFloat(); |
| 86 | } |
| 87 | |
| 88 | public boolean equals(Object obj) { |
| 89 | if (! (obj instanceof MismatchedReadExternal)) |
| 90 | return false; |
| 91 | MismatchedReadExternal other = (MismatchedReadExternal) obj; |
| 92 | return (i == other.i && f == other.f); |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | class InnocentBystander implements Serializable { |
| 97 | String s; |
| 98 | |
| 99 | InnocentBystander(String s) { |
| 100 | this.s = s; |
| 101 | } |
| 102 | |
| 103 | public boolean equals(Object obj) { |
| 104 | if (! (obj instanceof InnocentBystander)) |
| 105 | return false; |
| 106 | InnocentBystander other = (InnocentBystander) obj; |
| 107 | if (s != null) |
| 108 | return s.equals(other.s); |
| 109 | return (s == other.s); |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | public class SkipToEndOfBlockData { |
| 114 | public static void main(String[] args) throws Exception { |
| 115 | ObjectOutputStream oout; |
| 116 | ObjectInputStream oin; |
| 117 | ByteArrayOutputStream bout; |
| 118 | ByteArrayInputStream bin; |
| 119 | MismatchedRead mr, mrcopy; |
| 120 | MismatchedReadExternal mre, mrecopy; |
| 121 | InnocentBystander ib, ibcopy; |
| 122 | |
| 123 | bout = new ByteArrayOutputStream(); |
| 124 | oout = new ObjectOutputStream(bout); |
| 125 | mr = new MismatchedRead(1, (float) 2.34); |
| 126 | mre = new MismatchedReadExternal(5, (float) 6.78); |
| 127 | ib = new InnocentBystander("foo"); |
| 128 | |
| 129 | oout.writeObject(mr); |
| 130 | oout.writeObject(mre); |
| 131 | oout.writeObject(ib); |
| 132 | oout.flush(); |
| 133 | |
| 134 | bin = new ByteArrayInputStream(bout.toByteArray()); |
| 135 | oin = new ObjectInputStream(bin); |
| 136 | mrcopy = (MismatchedRead) oin.readObject(); |
| 137 | mrecopy = (MismatchedReadExternal) oin.readObject(); |
| 138 | ibcopy = (InnocentBystander) oin.readObject(); |
| 139 | |
| 140 | if (! (mr.equals(mrcopy) && mre.equals(mrecopy) && ib.equals(ibcopy))) |
| 141 | throw new Error("copy not equal to original"); |
| 142 | } |
| 143 | } |