1 /*
   2  * Copyright (c) 1998, 2003, 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
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  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
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  23 
  24 /* @test
  25    @bug 4028605 4109069 4234207 4401122
  26    @summary Make sure ZipInputStream/InflaterInputStream.available() will
  27             return 0 after EOF has reached and 1 otherwise.
  28    */
  29 
  30 
  31 import java.io.*;
  32 import java.util.zip.*;
  33 
  34 public class Available {
  35 
  36     public static void main(String[] args) throws Exception {
  37         // 4028605 4109069 4234207
  38         test1();
  39         // test 4401122
  40         test2();
  41     }
  42 
  43     private static void test1() throws Exception {
  44         File f = new File(System.getProperty("test.src", "."), "input.jar");
  45 
  46         // test ZipInputStream
  47         try (ZipInputStream z = new ZipInputStream(new FileInputStream(f))) {
  48             z.getNextEntry();
  49             tryAvail(z);
  50         }
  51 
  52         // test InflaterInputStream
  53         ZipFile zfile = new ZipFile(f);
  54         tryAvail(zfile.getInputStream(zfile.getEntry("Available.java")));
  55     }
  56 
  57     static void tryAvail(InputStream in) throws Exception {
  58         byte[] buf = new byte[1024];
  59         int n;
  60 
  61         while ((n = in.read(buf)) != -1);
  62         if (in.available() != 0) {
  63             throw new Exception("available should return 0 after EOF");
  64         }
  65     }
  66 
  67     // To reproduce 4401122
  68     private static void test2() throws Exception {
  69         File f = new File(System.getProperty("test.src", "."), "input.jar");
  70         ZipFile zf = new ZipFile(f);
  71         InputStream in = zf.getInputStream(zf.getEntry("Available.java"));
  72 
  73         int initialAvailable = in.available();
  74         in.read();
  75         if (in.available() != initialAvailable - 1)
  76             throw new RuntimeException("Available not decremented.");
  77         for(int j=0; j<initialAvailable-1; j++)
  78             in.read();
  79         if (in.available() != 0)
  80             throw new RuntimeException();
  81         in.close();
  82         if (in.available() != 0)
  83             throw new RuntimeException();
  84     }
  85 
  86 }