1 /*

     2  * Copyright (c) 2010, 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 6979683

    27  * @summary Verify that casts can narrow and unbox at the same time

    28  * @author jrose

    29  *

    30  * @compile TestCast6979683_GOOD.java

    31  * @run main TestCast6979683_GOOD

    32  */

    33 

    34 public class TestCast6979683_GOOD {

    35     public static void main(String... av) {

    36         bugReportExample();

    37         for (int x = -1; x <= 2; x++) {

    38             zconvTests(x != 0);

    39             iconvTests(x);

    40             bconvTests((byte)x);

    41             cconvTests((char)x);

    42         }

    43         System.out.println("Successfully ran "+tests+" tests.");

    44     }

    45 

    46     static int tests;

    47     static void assertEquals(Object x, Object y) {

    48         if (!x.equals(y)) {

    49             throw new RuntimeException("assertEquals: "+x+" != "+y);

    50         }

    51         ++tests;

    52     }

    53 

    54     static void bugReportExample() {

    55   {} // example in bug report:

    56   Object x = (Object)1;

    57   int y = (int)x;

    58   {} // end example

    59     }

    60 

    61     static boolean zconv1(Boolean o) { return o; }

    62     static boolean zconv2(Object o) { return (boolean)o; }

    63     static boolean zconv3(Comparable<Boolean> o) { return (boolean)o; }

    64 

    65     static void zconvTests(boolean x) {

    66         assertEquals(x, zconv1(x));

    67         assertEquals(x, zconv2(x));

    68         assertEquals(x, zconv3(x));

    69     }

    70 

    71     static int iconv1(Integer o) { return o; }

    72     static int iconv2(Object o) { return (int)o; }

    73     static int iconv3(java.io.Serializable o) { return (int)o; }

    74     static int iconv4(Number o) { return (int)o; }

    75     static int iconv5(Comparable<Integer> o) { return (int)o; }

    76 

    77     static void iconvTests(int x) {

    78         assertEquals(x, iconv1(x));

    79         assertEquals(x, iconv2(x));

    80         assertEquals(x, iconv3(x));

    81         assertEquals(x, iconv4(x));

    82         assertEquals(x, iconv5(x));

    83     }

    84 

    85     static float bconv1(Byte o) { return o; }  // note type "float"

    86     static float bconv2(Object o) { return (byte)o; }

    87     static float bconv3(java.io.Serializable o) { return (byte)o; }

    88     static float bconv4(Number o) { return (byte)o; }

    89 

    90     static void bconvTests(byte x) {

    91         float xf = x;

    92         assertEquals(xf, bconv1(x));

    93         assertEquals(xf, bconv2(x));

    94         assertEquals(xf, bconv3(x));

    95         assertEquals(xf, bconv4(x));

    96     }

    97 

    98     static float cconv1(Character o) { return o; }  // note type "float"

    99     static float cconv2(Object o) { return (char)o; }

   100     static float cconv3(java.io.Serializable o) { return (char)o; }

   101     static float cconv4(Comparable<Character> o) { return (char)o; }

   102 

   103     static void cconvTests(char x) {

   104         float xf = x;

   105         assertEquals(xf, cconv1(x));

   106         assertEquals(xf, cconv2(x));

   107         assertEquals(xf, cconv3(x));

   108         assertEquals(xf, cconv4(x));

   109     }

   110 

   111 }