--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/macosx/classes/com/apple/laf/ClientPropertyApplicator.java	Tue Mar 06 20:34:38 2012 +0000
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2011, 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 com.apple.laf;
+
+import java.beans.*;
+import java.util.*;
+
+import javax.swing.JComponent;
+
+public class ClientPropertyApplicator<T extends JComponent, N> implements PropertyChangeListener {
+    private final Map<String, Property<N>> properties = new HashMap<String, Property<N>>();
+
+    public ClientPropertyApplicator(final Property<N>... propertyList) {
+        for (final Property<N> p : propertyList) {
+            properties.put(p.name, p);
+        }
+    }
+
+    void applyProperty(final N target, final String propName, final Object value) {
+        final Property<N> property = properties.get(propName);
+        if (property != null) {
+            property.applyProperty(target, value);
+        }
+    }
+
+    public void attachAndApplyClientProperties(final T target) {
+        target.addPropertyChangeListener(this);
+        final N obj = convertJComponentToTarget(target);
+        if (obj == null) {
+            return;
+        }
+
+        final Set<String> propNames = properties.keySet();
+        for (final String propName : propNames) {
+            final Object value = target.getClientProperty(propName);
+            if (value == null) {
+                continue;
+            }
+            applyProperty(obj, propName, value);
+        }
+    }
+
+    public void removeFrom(final T target) {
+        target.removePropertyChangeListener(this);
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public void propertyChange(final PropertyChangeEvent evt) {
+        final N obj = convertJComponentToTarget((T)evt.getSource());
+        if (obj == null) return;
+        applyProperty(obj, evt.getPropertyName(), evt.getNewValue());
+    }
+
+    @SuppressWarnings("unchecked")
+    public N convertJComponentToTarget(final T component) {
+        return (N)component; // naive implementation
+    }
+
+    public abstract static class Property<X> {
+        final String name;
+
+        public Property(final String name) {
+            this.name = name;
+        }
+
+        public abstract void applyProperty(final X target, final Object value);
+    }
+}