test/jdk/java/nio/Buffer/Basic-X.java.template

*** 1,7 ****
  /*
!  * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,7 ----
  /*
!  * Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
*** 28,38 ****
--- 28,47 ----
   * independently of the rest of the source tree.
   */
  
  #warn This file is preprocessed before being compiled
  
+ #if[byte]
+ import java.io.IOException;
+ import java.io.UncheckedIOException;
+ #end[byte]
  import java.nio.*;
+ #if[byte]
+ import java.nio.channels.FileChannel;
+ import java.nio.file.Files;
+ import java.nio.file.Path;
+ #end[byte]
  
  
  public class Basic$Type$
      extends Basic
  {
*** 467,476 ****
--- 476,520 ----
                  if (as.limit() != ec) {
                      fail("Buffer capacity incorrect, expected: " + ec, as);
                  }
              }
          }
+ 
+         // mapped buffers
+         try {
+             for (MappedByteBuffer bb : mappedBuffers()) {
+                 try {
+                     int offset = bb.alignmentOffset(1, 4);
+                     ck(bb, offset >= 0);
+                 } catch (UnsupportedOperationException e) {
+                     System.out.println("Not applicable, UOE thrown: ");
+                 }
+             }
+         } catch (IOException e) {
+             throw new UncheckedIOException(e);
+         }
+     }
+ 
+     private static MappedByteBuffer[] mappedBuffers() throws IOException {
+         return new MappedByteBuffer[]{
+                 createMappedBuffer(new byte[]{0, 1, 2, 3}),
+                 createMappedBuffer(new byte[]{0, 1, 2, -3,
+                     45, 6, 7, 78, 3, -7, 6, 7, -128, 127}),
+         };
+     }
+ 
+     private static MappedByteBuffer createMappedBuffer(byte[] contents)
+         throws IOException {
+         Path tempFile = Files.createTempFile("mbb", null);
+         tempFile.toFile().deleteOnExit();
+         Files.write(tempFile, contents);
+         try (FileChannel fc = FileChannel.open(tempFile)) {
+             MappedByteBuffer map =
+                 fc.map(FileChannel.MapMode.READ_ONLY, 0, contents.length);
+             map.load();
+             return map;
+         }
      }
  #end[byte]
  
      private static void fail(String problem,
                               $Type$Buffer xb, $Type$Buffer yb,