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diff --git a/src/java.corba/share/classes/com/sun/corba/se/impl/ior/FreezableList.java b/src/java.corba/share/classes/com/sun/corba/se/impl/ior/FreezableList.java
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+/*
+ * Copyright (c) 2000, 2003, 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.sun.corba.se.impl.ior ;
+
+import java.util.Collection ;
+import java.util.List ;
+import java.util.AbstractList ;
+import java.util.ListIterator ;
+import java.util.Iterator ;
+
+import com.sun.corba.se.spi.ior.MakeImmutable ;
+
+/** Simple class that delegates all List operations to
+* another list.  It also can be frozen, which means that
+* a number of operations can be performed on the list,
+* and then the list can be made immutable, so that no
+* further changes are possible.  A FreezableList is frozen
+* using the makeImmutable method.
+*/
+public class FreezableList extends AbstractList {
+    private List delegate = null ;
+    private boolean immutable = false ;
+
+    public boolean equals( Object obj )
+    {
+        if (obj == null)
+            return false ;
+
+        if (!(obj instanceof FreezableList))
+            return false ;
+
+        FreezableList other = (FreezableList)obj ;
+
+        return delegate.equals( other.delegate ) &&
+            (immutable == other.immutable) ;
+    }
+
+    public int hashCode()
+    {
+        return delegate.hashCode() ;
+    }
+
+    public FreezableList( List delegate, boolean immutable  )
+    {
+        this.delegate = delegate ;
+        this.immutable = immutable ;
+    }
+
+    public FreezableList( List delegate )
+    {
+        this( delegate, false ) ;
+    }
+
+    public void makeImmutable()
+    {
+        immutable = true ;
+    }
+
+    public boolean isImmutable()
+    {
+        return immutable ;
+    }
+
+    public void makeElementsImmutable()
+    {
+        Iterator iter = iterator() ;
+        while (iter.hasNext()) {
+            Object obj = iter.next() ;
+            if (obj instanceof MakeImmutable) {
+                MakeImmutable element = (MakeImmutable)obj ;
+                element.makeImmutable() ;
+            }
+        }
+    }
+
+    // Methods overridden from AbstractList
+
+    public int size()
+    {
+        return delegate.size() ;
+    }
+
+    public Object get(int index)
+    {
+        return delegate.get(index) ;
+    }
+
+    public Object set(int index, Object element)
+    {
+        if (immutable)
+            throw new UnsupportedOperationException() ;
+
+        return delegate.set(index, element) ;
+    }
+
+    public void add(int index, Object element)
+    {
+        if (immutable)
+            throw new UnsupportedOperationException() ;
+
+        delegate.add(index, element) ;
+    }
+
+    public Object remove(int index)
+    {
+        if (immutable)
+            throw new UnsupportedOperationException() ;
+
+        return delegate.remove(index) ;
+    }
+
+    // We also override subList so that the result is a FreezableList.
+    public List subList(int fromIndex, int toIndex)
+    {
+        List list = delegate.subList(fromIndex, toIndex) ;
+        List result = new FreezableList( list, immutable ) ;
+        return result ;
+    }
+}