1 /* 2 * Copyright (c) 2014, 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 import java.awt.datatransfer.DataFlavor; 25 26 /** 27 * @test 28 * @bug 8038999 29 * @summary DataFlavor.equals is not symmetric 30 * @author Petr Pchelko <petr.pchelko@oracle.com> 31 */ 32 public class EqualsHashCodeSymmetryTest { 33 34 private static final DataFlavor[] dataFlavors = { 35 DataFlavor.stringFlavor, 36 DataFlavor.imageFlavor, 37 DataFlavor.javaFileListFlavor, 38 DataFlavor.allHtmlFlavor, 39 DataFlavor.selectionHtmlFlavor, 40 DataFlavor.fragmentHtmlFlavor, 41 createFlavor("text/html; class=java.lang.String"), 42 new DataFlavor(String.class, "My test flavor number 1"), 43 new DataFlavor(String.class, "My test flavor number 2"), 44 new DataFlavor(StringBuilder.class, "My test flavor number 1") 45 }; 46 47 public static void main(String[] args) { 48 testEqualsSymmetry(); 49 testEqualsHashCodeConsistency(); 50 testSimpleCollision(); 51 } 52 53 private static void testEqualsSymmetry() { 54 for (DataFlavor flavor1 : dataFlavors) { 55 for (DataFlavor flavor2 : dataFlavors) { 56 if (flavor1.equals(flavor2) != flavor2.equals(flavor1)) { 57 throw new RuntimeException( 58 String.format("Equals is not symmetric for %s and %s", flavor1, flavor2)); 59 } 60 } 61 } 62 } 63 64 private static void testEqualsHashCodeConsistency() { 65 for (DataFlavor flavor1 : dataFlavors) { 66 for (DataFlavor flavor2 : dataFlavors) { 67 if ((flavor1.equals(flavor2) && flavor1.hashCode() != flavor2.hashCode())) { 68 throw new RuntimeException( 69 String.format("Equals and hash code not consistent for %s and %s", flavor1, flavor2)); 70 } 71 } 72 } 73 } 74 75 private static void testSimpleCollision() { 76 if (createFlavor("text/html; class=java.lang.String").hashCode() == DataFlavor.allHtmlFlavor.hashCode()) { 77 throw new RuntimeException("HashCode collision because the document parameter is not used"); 78 } 79 } 80 81 private static DataFlavor createFlavor(String mime) { 82 try { 83 return new DataFlavor(mime); 84 } catch (ClassNotFoundException e) { 85 throw new RuntimeException(e); 86 } 87 } 88 }