1 /*

     2  * Copyright 1998 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 /*

    25  * @test

    26  * @bug 4054043

    27  * @summary Test bufferedinputstream when stream is interrupted

    28  *

    29  */

    30 

    31 import java.io.*;

    32 

    33 /**

    34  * This class tests to see if bufferinputstream updates count

    35  * when the stream is interrupted and restarted

    36  * It was adapted from a test class provided in the bug report

    37  *

    38  */

    39 

    40 public class CountUpdate {

    41 

    42     public static void main(String[] args) throws Exception {

    43         BufferBreaker breaker = new BufferBreaker();

    44         BufferedInputStream in = new BufferedInputStream(breaker, 1000);

    45 

    46         byte b[] = new byte[100];

    47         int total = 0;

    48 

    49         for (int i=0; i<5; i++) {

    50 

    51             if (i>0) breaker.breakIt = true;

    52             try {

    53                 int n = in.read(b);

    54                 total += n;

    55                 //System.out.print("read "+n+" bytes: [");

    56                 //System.out.write(b, 0, n);

    57                 //System.out.println("]");

    58             }

    59             catch (IOException e) {

    60                 //System.out.println(e);

    61             }

    62         }

    63 

    64         if (total>7)

    65             throw new RuntimeException(

    66                             "BufferedInputStream did not reset count.");

    67     }

    68 }

    69 

    70 class BufferBreaker extends InputStream {

    71     public boolean breakIt = false;

    72 

    73     public int read() {

    74         return 'x';

    75     }

    76 

    77     public static final byte[] buffer = {(byte)'a',

    78                                          (byte)'b',

    79                                          (byte)'c',

    80                                          (byte)'d',

    81                                          (byte)'e',

    82                                          (byte)'f',

    83                                          (byte)'g'};

    84 

    85     public int read(byte b[]) throws IOException {

    86         return read(b, 0, b.length);

    87     }

    88 

    89     public int read(byte b[], int off, int len) throws IOException {

    90         if (breakIt) throw new IOException("BREAK");

    91         if (len > buffer.length) len = buffer.length;

    92         System.arraycopy(buffer, 0, b, off, len);

    93         return len;

    94     }

    95 

    96     public long skip(long n) {

    97         return 0;

    98     }

    99 

   100     public int available() {

   101         return 0;

   102     }

   103 

   104 }