1 /*
   2  * Copyright (c) 2019, 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 8078891
  26  * @summary Ensure close() closes all component streams
  27  */
  28 
  29 import java.io.ByteArrayInputStream;
  30 import java.io.IOException;
  31 import java.io.SequenceInputStream;
  32 import java.util.Collections;
  33 import java.util.Enumeration;
  34 import java.util.List;
  35 
  36 public class Close {
  37 
  38     public static void main(String[] argv) {
  39         byte[] buf = new byte[42];
  40 
  41         List<CloseableBAOS> list = List.of(new CloseableBAOS(buf),
  42             new CloseableBAOS(buf), new CloseableBAOS(buf),
  43             new CloseableBAOS(buf));
  44 
  45         Enumeration<CloseableBAOS> enumeration = Collections.enumeration(list);
  46 
  47         SequenceInputStream sequence = new SequenceInputStream(enumeration);
  48         try {
  49             sequence.close();
  50             throw new RuntimeException("Expected IOException not thrown");
  51         } catch (IOException e) {
  52             for (CloseableBAOS c : list) {
  53                 if (!c.isClosed()) {
  54                     throw new RuntimeException("Component stream not closed");
  55                 }
  56             }
  57             Throwable[] suppressed = e.getSuppressed();
  58             if (suppressed == null) {
  59                 throw new RuntimeException("No suppressed exceptions");
  60             } else if (suppressed.length != list.size() - 1) {
  61                 throw new RuntimeException("Expected " + (list.size() - 1) +
  62                     " suppressed exceptions but got " + suppressed.length);
  63             }
  64             for (Throwable t : suppressed) {
  65                 if (!(t instanceof IOException)) {
  66                     throw new RuntimeException("Expected IOException but got " +
  67                         t.getClass().getName());
  68                 }
  69             }
  70         }
  71     }
  72 
  73     static class CloseableBAOS extends ByteArrayInputStream{
  74         private boolean closed;
  75 
  76         CloseableBAOS(byte[] buf) {
  77             super(buf);
  78         }
  79 
  80         @Override
  81         public void close() throws IOException {
  82             closed = true;
  83             throw new IOException();
  84         }
  85 
  86         public boolean isClosed() {
  87             return closed;
  88         }
  89     }
  90 }