[PATCH] 7164256 : EnumMap.clone doesn't clear the entrySet field, keeping a reference to the original Map (original) (raw)

Alan Bateman Alan.Bateman at oracle.com
Wed Jun 6 12:28:39 UTC 2012

This looks good to me and I'm happy to sponsor this. Does anyone else want to review this?

-Alan

On 29/05/2012 03:37, Diego Belfer wrote:

:

# HG changeset patch # User muralx # Date 1338257674 10800 # Node ID f61b94fd7aca738353177fcf3cc3972ddf36cf36 # Parent 9b8c96f96a0f9a5801b55530a387fefbe50482a3 PATCH 7164256 : EnumMap.clone does not clear the instance field entrySet diff --git a/src/share/classes/java/util/EnumMap.java b/src/share/classes/java/util/EnumMap.java --- a/src/share/classes/java/util/EnumMap.java +++ b/src/share/classes/java/util/EnumMap.java @@ -721,6 +721,7 @@ throw new AssertionError(); } result.vals = result.vals.clone(); + result.entrySet = null; return result; } diff --git a/test/java/util/EnumMap/ProperEntrySetOnClone.java b/test/java/util/EnumMap/ProperEntrySetOnClone.java new file mode 100644 --- /dev/null +++ b/test/java/util/EnumMap/ProperEntrySetOnClone.java @@ -0,0 +1,58 @@ +/* + * Copyright (c) 2012, 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. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com <http://www.oracle.com> if you need additional information or have any + * questions. + */ + +/* + * @test + * @bug 7164256 + * @summary EnumMap.entrySet() returns an entrySet referencing to the cloned instance + * @author Diego Belfer + */ + +import java.util.EnumMap; + +public class ProperEntrySetOnClone { + public enum Test { + ONE, TWO + } + + public static void main(String[] args) { + EnumMap<Test, String> map1 = new EnumMap<Test,_ _String>(Test.class); + map1.put(Test.ONE, "1"); + map1.put(Test.TWO, "2"); + + // We need to force creation of the map1.entrySet + int size = map1.entrySet().size(); + if (size != 2) { + throw new RuntimeException( + "Invalid size in original map. Expected: 2 was: " + size); + } + + EnumMap<Test, String> map2 = map1.clone(); + map2.remove(Test.ONE); + size = map2.entrySet().size(); + if (size != 1) { + throw new RuntimeException( + "Invalid size in cloned instance. Expected: 1 was: " + size); + } + } +}

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