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diff --git a/src/javax/media/j3d/J3dQueryProps.java b/src/javax/media/j3d/J3dQueryProps.java
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+/*
+ * Copyright 1999-2008 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 javax.media.j3d;
+
+import java.util.AbstractMap;
+import java.util.AbstractSet;
+import java.util.ArrayList;
+import java.util.Hashtable;
+import java.util.Iterator;
+import java.util.Set;
+
+
+/**
+ * Properties object for query operations.  It is a read-only Map backed
+ * up by a Hashtable.
+ */
+class J3dQueryProps extends AbstractMap {
+    private Hashtable table;
+    private Set entrySet = null;
+
+
+    /**
+     * Constructs a new J3dQueryProps object using the specified
+     * array of keys and the specified values.  The arrays must be
+     * the same size.
+     */
+    J3dQueryProps(ArrayList<String> keys, ArrayList<Object> values) {
+	table = new Hashtable();
+	for (int i = 0; i < keys.size(); i++) {
+		table.put(keys.get(i), values.get(i));
+	}
+    }
+
+    /**
+     * Gets value corresponding to specified key
+     */
+    @Override
+    public Object get(Object key) {
+	return table.get(key);
+    }
+
+    /**
+     * Returns true if the specified key is contained in this Map
+     */
+    @Override
+    public boolean containsKey(Object key) {
+	return table.containsKey(key);
+    }
+
+    /**
+     * Returns true if the specified value is contained in this Map
+     */
+    @Override
+    public boolean containsValue(Object value) {
+	return table.containsValue(value);
+    }
+
+    /**
+     * Returns a new Set object for the entries of this map
+     */
+    @Override
+    public Set entrySet() {
+	if (entrySet == null)
+	    entrySet = new EntrySet();
+
+	return entrySet;
+    }
+
+
+    /**
+     * Entry set class
+     */
+    private class EntrySet extends AbstractSet {
+	private EntrySet() {
+	}
+
+	@Override
+	public int size() {
+	    return table.size();
+	}
+
+	@Override
+	public Iterator iterator() {
+	    return new MapIterator();
+	}
+    }
+
+
+    /**
+     * Entry set class
+     */
+    private class MapIterator implements Iterator {
+	private Iterator i;
+
+	private MapIterator() {
+	    i = table.entrySet().iterator();
+	}
+
+	@Override
+	public boolean hasNext() {
+	    return i.hasNext();
+	}
+
+	@Override
+	public Object next() {
+	    return i.next();
+	}
+
+	@Override
+	public void remove() {
+	    throw new UnsupportedOperationException();
+	}
+    }
+}