diff -r 7e765d50416f -r 889df16bef60 jdk/src/share/classes/sun/management/LockInfoCompositeData.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/management/LockInfoCompositeData.java	Fri Sep 14 09:47:14 2012 -0700
@@ -0,0 +1,118 @@
+/*
+ * 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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 if you need additional information or have any
+ * questions.
+ */
+
+package sun.management;
+
+import java.lang.management.LockInfo;
+import javax.management.openmbean.CompositeType;
+import javax.management.openmbean.CompositeData;
+import javax.management.openmbean.CompositeDataSupport;
+import javax.management.openmbean.OpenDataException;
+
+/**
+ * A CompositeData for LockInfo for the local management support.
+ * This class avoids the performance penalty paid to the
+ * construction of a CompositeData use in the local case.
+ */
+public class LockInfoCompositeData extends LazyCompositeData {
+    private final LockInfo lock;
+
+    private LockInfoCompositeData(LockInfo li) {
+        this.lock = li;
+    }
+
+    public LockInfo getLockInfo() {
+        return lock;
+    }
+
+    public static CompositeData toCompositeData(LockInfo li) {
+        if (li == null) {
+            return null;
+        }
+
+        LockInfoCompositeData licd = new LockInfoCompositeData(li);
+        return licd.getCompositeData();
+    }
+
+    protected CompositeData getCompositeData() {
+        // CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH
+        // lockInfoItemNames!
+        final Object[] lockInfoItemValues = {
+            new String(lock.getClassName()),
+            new Integer(lock.getIdentityHashCode()),
+        };
+
+        try {
+            return new CompositeDataSupport(lockInfoCompositeType,
+                                            lockInfoItemNames,
+                                            lockInfoItemValues);
+        } catch (OpenDataException e) {
+            // Should never reach here
+            throw Util.newException(e);
+        }
+    }
+
+    private static final CompositeType lockInfoCompositeType;
+    static {
+        try {
+            lockInfoCompositeType = (CompositeType)
+                MappedMXBeanType.toOpenType(LockInfo.class);
+        } catch (OpenDataException e) {
+            // Should never reach here
+            throw Util.newException(e);
+        }
+    }
+
+    static CompositeType getLockInfoCompositeType() {
+        return lockInfoCompositeType;
+    }
+
+    private static final String CLASS_NAME         = "className";
+    private static final String IDENTITY_HASH_CODE = "identityHashCode";
+    private static final String[] lockInfoItemNames = {
+        CLASS_NAME,
+        IDENTITY_HASH_CODE,
+    };
+
+    /*
+     * Returns a LockInfo object mapped from the given CompositeData.
+     */
+    public static LockInfo toLockInfo(CompositeData cd) {
+        if (cd == null) {
+            throw new NullPointerException("Null CompositeData");
+        }
+
+        if (!isTypeMatched(lockInfoCompositeType, cd.getCompositeType())) {
+            throw new IllegalArgumentException(
+                "Unexpected composite type for LockInfo");
+        }
+
+        String className = getString(cd, CLASS_NAME);
+        int identityHashCode = getInt(cd, IDENTITY_HASH_CODE);
+        return new LockInfo(className, identityHashCode);
+    }
+
+    private static final long serialVersionUID = -6374759159749014052L;
+}