1 /* 2 * Copyright (c) 2012, 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 /* @test 25 * @bug 7160242 7165118 7197662 26 * @summary Check if NullPointerException is thrown if the key passed 27 * to remove() is null. 28 * @run main/othervm -Djava.util.prefs.userRoot=. RemoveNullKeyCheck 29 */ 30 31 import java.util.prefs.Preferences; 32 import java.util.prefs.AbstractPreferences; 33 import java.util.prefs.BackingStoreException; 34 35 public class RemoveNullKeyCheck { 36 37 private static boolean failed = false; 38 39 public static void main(String[] args) throws Exception { 40 checkPreferencesRemove(); 41 checkAbstractPreferencesRemove(); 42 if (failed) { 43 throw new RuntimeException("Expected NullPointerException " + 44 "not thrown"); 45 } 46 } 47 48 public static void checkPreferencesRemove() { 49 try { 50 Preferences node = Preferences.userRoot().node("N1"); 51 node.remove(null); 52 failed = true; 53 } catch (NullPointerException npe) { 54 } 55 } 56 57 public static void checkAbstractPreferencesRemove() { 58 59 Preferences abstrPrefs = new AbstractPreferences(null, "") { 60 @Override 61 protected void putSpi(String key, String value) { 62 } 63 @Override 64 protected String getSpi(String key) { 65 return null; 66 } 67 @Override 68 protected void removeSpi(String key) { 69 } 70 @Override 71 protected void removeNodeSpi() throws BackingStoreException { 72 } 73 @Override 74 protected String[] keysSpi() throws BackingStoreException { 75 return new String[0]; 76 } 77 @Override 78 protected String[] childrenNamesSpi() throws BackingStoreException { 79 return new String[0]; 80 } 81 @Override 82 protected AbstractPreferences childSpi(String name) { 83 return null; 84 } 85 @Override 86 protected void syncSpi() throws BackingStoreException { 87 } 88 @Override 89 protected void flushSpi() throws BackingStoreException { 90 } 91 }; 92 93 try { 94 abstrPrefs.remove(null); 95 failed = true; 96 } catch(NullPointerException npe) { 97 } 98 } 99 }