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Ice is a comprehensive RPC framework that helps you build distributed applications with minimal effort using familiar object-oriented idioms

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// **********************************************************************
//
// Copyright (c) 2003-2017 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************

package IceInternal;

public class ListPatcher implements Patcher, Ice.ReadObjectCallback
{
    public
    ListPatcher(java.util.List list, Class cls, String type, int index)
    {
        _list = list;
        _cls = cls;
        _type = type;
        _index = index;
    }

    @Override
    public void
    patch(Ice.Object v)
    {
        if(v != null)
        {
            //
            // Raise ClassCastException if the element doesn't match the expected type.
            //
            if(!_cls.isInstance(v))
            {
                throw new ClassCastException("expected element of type " + _cls.getName() + " but received " +
                                             v.getClass().getName());
            }
        }

        //
        // This isn't very efficient for sequentially-accessed lists, but there
        // isn't much we can do about it as long as a new patcher instance is
        // created for each element.
        //
        _list.set(_index, _cls.cast(v));
    }

    @Override
    public String
    type()
    {
        return _type;
    }

    @Override
    public void
    invoke(Ice.Object v)
    {
        patch(v);
    }

    private java.util.List _list;
    private Class _cls;
    private String _type;
    private int _index;
}