1 /*
   2  * Copyright (c) 2011, 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 /*
  25  * @test
  26  * @bug     7087549
  27  * @summary Test custom options with newInputStream.
  28  * @author  Brandon Passanisi
  29  * @library ..
  30  * @build   CustomOptions PassThroughFileSystem
  31  */
  32 
  33 import java.io.IOException;
  34 import java.io.InputStream;
  35 import java.net.URI;
  36 import java.nio.file.*;
  37 import java.nio.file.attribute.FileAttribute;
  38 import java.nio.file.spi.FileSystemProvider;
  39 import java.nio.channels.SeekableByteChannel;
  40 import java.util.Collections;
  41 import java.util.Set;
  42 import java.util.Map;
  43 
  44 public class CustomOptions {
  45 
  46     // Create a custom option
  47     static enum CustomOption implements OpenOption {
  48         IGNORE,
  49     }
  50 
  51     // number of times that IGNORE option is observed
  52     static int ignoreCount;
  53 
  54     // A pass through provider that supports a custom open option
  55     static class MyCustomProvider extends PassThroughFileSystem.PassThroughProvider {
  56         public MyCustomProvider() { }
  57 
  58         @Override
  59         public SeekableByteChannel newByteChannel(Path path,
  60                                                   Set<? extends OpenOption> options,
  61                                                   FileAttribute<?>... attrs)
  62             throws IOException
  63         {
  64             if (options.contains(CustomOption.IGNORE)) {
  65                 ignoreCount++;
  66                 options.remove(CustomOption.IGNORE);
  67             }
  68             return super.newByteChannel(path, options, attrs);
  69         }
  70     }
  71 
  72     public static void main(String[] args) throws Exception {
  73         FileSystemProvider provider = new MyCustomProvider();
  74         Map<String,?> env = Collections.emptyMap();
  75         URI uri = URI.create("pass:///");
  76         FileSystem fs = provider.newFileSystem(uri, env);
  77 
  78         // Create temp dir for testing
  79         Path dir = TestUtil.createTemporaryDirectory();
  80         try {
  81 
  82             // Create temp file for testing
  83             Path path = fs.getPath(dir.resolve("foo").toString());
  84             Files.createFile(path);
  85 
  86             // Test custom option
  87             Files.newInputStream(path, CustomOption.IGNORE).close();
  88             if (ignoreCount != 1)
  89                 throw new RuntimeException("IGNORE option not passed through");
  90 
  91             // Test null option
  92             try {
  93                 Files.newInputStream(path, new OpenOption[] { null }).close();
  94                 throw new RuntimeException("NullPointerException expected");
  95             } catch (NullPointerException ignore) { }
  96 
  97             // Test unsupported options
  98             try {
  99                 Files.newInputStream(path, StandardOpenOption.WRITE).close();
 100                 throw new RuntimeException("UnsupportedOperationException expected");
 101             } catch (UnsupportedOperationException uoe) { }
 102             try {
 103                 Files.newInputStream(path, StandardOpenOption.APPEND).close();
 104                 throw new RuntimeException("UnsupportedOperationException expected");
 105             } catch (UnsupportedOperationException uoe) { }
 106 
 107         } finally {
 108             // Cleanup
 109             TestUtil.removeAll(dir);
 110         }
 111     }
 112 }