1 /*
   2  * Copyright (c) 2005, 2015, 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 6273752
  27  * @summary Test ImmutableDescriptor.union
  28  * @author Eamonn McManus
  29  * @modules java.management
  30  * @run clean UnionTest
  31  * @run build UnionTest
  32  * @run main UnionTest
  33  */
  34 
  35 import java.util.Collections;
  36 import javax.management.Descriptor;
  37 import javax.management.ImmutableDescriptor;
  38 import static javax.management.ImmutableDescriptor.union;
  39 import static javax.management.ImmutableDescriptor.EMPTY_DESCRIPTOR;
  40 import javax.management.modelmbean.DescriptorSupport;
  41 
  42 public class UnionTest {
  43     public static void main(String[] args) throws Exception {
  44         ImmutableDescriptor immutableEmpty = new ImmutableDescriptor();
  45         DescriptorSupport mutableEmpty = new DescriptorSupport();
  46 
  47         checkEmpty(union());
  48         checkEmpty(union(immutableEmpty));
  49         checkEmpty(union(mutableEmpty));
  50         checkEmpty(union(EMPTY_DESCRIPTOR, immutableEmpty, mutableEmpty));
  51         checkEmpty(union(null, immutableEmpty, null));
  52 
  53         ImmutableDescriptor immutableNumbers =
  54             new ImmutableDescriptor(new String[] {"one", "two", "three"},
  55                                     new Object[] {1, 2, 3});
  56         final String[] noNames = null;
  57         DescriptorSupport mutableNumbers =
  58             new DescriptorSupport(immutableNumbers.getFieldNames(),
  59                                   immutableNumbers.getFieldValues(noNames));
  60         ImmutableDescriptor immutableOne =
  61             new ImmutableDescriptor(Collections.singletonMap("one", 1));
  62         DescriptorSupport mutableOne =
  63             new DescriptorSupport(new String[] {"one"}, new Object[] {1});
  64         ImmutableDescriptor immutableTwo =
  65             new ImmutableDescriptor(Collections.singletonMap("two", 2));
  66         DescriptorSupport mutableTwo =
  67             new DescriptorSupport(new String[] {"two"}, new Object[] {2});
  68         ImmutableDescriptor immutableOneTwo =
  69             new ImmutableDescriptor(new String[] {"one", "two"},
  70                                     new Object[] {1, 2});
  71 
  72 
  73         checkEqual(union(immutableNumbers), immutableNumbers);
  74         checkEqual(union(immutableNumbers, mutableNumbers), immutableNumbers);
  75         checkEqual(union(mutableNumbers, immutableNumbers), immutableNumbers);
  76         checkEqual(union(mutableEmpty, immutableEmpty, immutableNumbers,
  77                          mutableNumbers, immutableOne), immutableNumbers);
  78         checkEqual(union(immutableOne, immutableTwo, immutableNumbers),
  79                    immutableNumbers);
  80         checkEquivalent(union(immutableOne, mutableNumbers), immutableNumbers);
  81         checkEquivalent(union(immutableOne, immutableTwo), immutableOneTwo);
  82         checkEquivalent(union(mutableOne, mutableTwo), immutableOneTwo);
  83 
  84         if (failure != null)
  85             throw new Exception("TEST FAILED: " + failure);
  86         System.out.println("TEST PASSED");
  87     }
  88 
  89     private static void checkEmpty(ImmutableDescriptor d) {
  90         if (d != EMPTY_DESCRIPTOR) {
  91             failure = "Union of empty descriptors should be " +
  92                 "ImmutableDescriptor.EMPTY";
  93             System.err.println("FAILED: " + failure);
  94             Thread.dumpStack();
  95         }
  96     }
  97 
  98     private static void checkEqual(ImmutableDescriptor d,
  99                                    ImmutableDescriptor e) {
 100         if (d != e) {
 101             failure = "Union should produce one of its arguments but does not";
 102             System.err.println("FAILED: " + failure);
 103             Thread.dumpStack();
 104         }
 105     }
 106 
 107     private static void checkEquivalent(ImmutableDescriptor d,
 108                                         ImmutableDescriptor e) {
 109         if (!d.equals(e)) {
 110             failure = "Union produced this: " + d + "; but should have " +
 111                 "produced this: " + e;
 112             System.err.println("FAILED: " + failure);
 113             Thread.dumpStack();
 114         }
 115     }
 116 
 117     private static String failure;
 118 }