--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/com/sun/jmx/namespace/serial/JMXNamespaceContext.java	Thu Sep 04 14:46:36 2008 +0200
@@ -0,0 +1,145 @@
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package com.sun.jmx.namespace.serial;
+
+import com.sun.jmx.defaults.JmxProperties;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+
+/**
+ * The JMXNamespaceContext class is used to implement a thread local
+ * serialization / deserialization context for namespaces.
+ * <p>
+ * This class is consulted by {@link javax.management.ObjectName} at
+ * serialization / deserialization time.
+ * The serialization or deserialization context is established by
+ * by the {@link SerialRewritingProcessor} defined in this package.
+ * <p>
+ * These classes are Sun proprietary APIs, subject to change without
+ * notice. Do not use these classes directly.
+ * The public API to rewrite ObjectNames embedded in parameters is
+ * defined in {@link javax.management.namespace.JMXNamespaces}.
+ *
+ * <p><b>
+ * This API is a Sun internal API and is subject to changes without notice.
+ * </b></p>
+ * @since 1.7
+ */
+public class JMXNamespaceContext {
+
+    private static final Logger LOG = JmxProperties.NAMESPACE_LOGGER;
+
+    public final String prefixToRemove;
+    public final String prefixToAdd;
+
+    private JMXNamespaceContext(String add, String remove) {
+        prefixToRemove = (remove==null?"":remove);
+        prefixToAdd    = (add==null?"":add);
+    }
+
+    private final static class SerialContext {
+        private JMXNamespaceContext serializationContext;
+        private JMXNamespaceContext deserializationContext;
+        public SerialContext(){
+            serializationContext = new JMXNamespaceContext("","");
+            deserializationContext = new JMXNamespaceContext("","");
+        }
+    }
+
+    private final static ThreadLocal<SerialContext> prefix =
+            new ThreadLocal<SerialContext>() {
+        @Override
+        protected SerialContext initialValue() {
+            return new SerialContext();
+        }
+    };
+
+    public static JMXNamespaceContext getSerializationContext() {
+        return prefix.get().serializationContext;
+    }
+
+    public static JMXNamespaceContext getDeserializationContext() {
+        return prefix.get().deserializationContext;
+    }
+
+    private static String[] setSerializationContext(String oldPrefix,
+            String newPrefix) {
+        final SerialContext c = prefix.get();
+        JMXNamespaceContext dc = c.serializationContext;
+        String[] old = {dc.prefixToRemove, dc.prefixToAdd};
+        c.serializationContext = new JMXNamespaceContext(newPrefix,oldPrefix);
+        return old;
+    }
+
+    private static String[] setDeserializationContext(String oldPrefix,
+            String newPrefix) {
+        final SerialContext c = prefix.get();
+        JMXNamespaceContext dc = c.deserializationContext;
+        String[] old = {dc.prefixToRemove, dc.prefixToAdd};
+        c.deserializationContext = new JMXNamespaceContext(newPrefix,oldPrefix);
+        return old;
+    }
+
+    static void serialize(ObjectOutputStream stream, Object obj,
+            String prefixToRemove, String prefixToAdd)
+            throws IOException {
+        final String[] old =
+                setSerializationContext(prefixToRemove,prefixToAdd);
+        try {
+            stream.writeObject(obj);
+        } finally {
+            try {
+                setSerializationContext(old[0],old[1]);
+            } catch (Exception x) {
+                LOG.log(Level.FINEST,
+                        "failed to restore serialization context",x);
+            }
+        }
+    }
+
+    static Object deserialize(ObjectInputStream stream,
+            String prefixToRemove,
+            String prefixToAdd)
+            throws IOException, ClassNotFoundException {
+        final String[] old =
+                setDeserializationContext(prefixToRemove,prefixToAdd);
+        try {
+            return stream.readObject();
+        } finally {
+            try {
+                setDeserializationContext(old[0],old[1]);
+            } catch (Exception x) {
+                LOG.log(Level.FINEST,
+                        "failed to restore serialization context",x);
+            }
+        }
+    }
+
+}