1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   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  *
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  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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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 (FileInputStream fis = new FileInputStream(f);
  48              ZipInputStream z = new ZipInputStream(fis))
  49         {
  50             z.getNextEntry();
  51             tryAvail(z);
  52         }
  53 
  54         // test InflaterInputStream
  55         try (ZipFile zfile = new ZipFile(f)) {
  56             tryAvail(zfile.getInputStream(zfile.getEntry("Available.java")));
  57         }
  58     }
  59 
  60     static void tryAvail(InputStream in) throws Exception {
  61         byte[] buf = new byte[1024];
  62         int n;
  63 
  64         while ((n = in.read(buf)) != -1);
  65         if (in.available() != 0) {
  66             throw new Exception("available should return 0 after EOF");
  67         }
  68     }
  69 
  70     // To reproduce 4401122
  71     private static void test2() throws Exception {
  72         File f = new File(System.getProperty("test.src", "."), "input.jar");
  73         try (ZipFile zf = new ZipFile(f)) {
  74             InputStream in = zf.getInputStream(zf.getEntry("Available.java"));
  75 
  76             int initialAvailable = in.available();
  77             in.read();
  78             if (in.available() != initialAvailable - 1)
  79                 throw new RuntimeException("Available not decremented.");
  80             for(int j=0; j<initialAvailable-1; j++)
  81                 in.read();
  82             if (in.available() != 0)
  83                 throw new RuntimeException();
  84             in.close();
  85             if (in.available() != 0)
  86                 throw new RuntimeException();
  87         }
  88     }
  89 
  90 }