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OpenL Constraint Programming engine

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package org.openl.ie.constrainer;

///////////////////////////////////////////////////////////////////////////////
/*
 * Copyright Exigen Group 1998, 1999, 2000
 * 320 Amboy Ave., Metuchen, NJ, 08840, USA, www.exigengroup.com
 *
 * The copyright to the computer program(s) herein
 * is the property of Exigen Group, USA. All rights reserved.
 * The program(s) may be used and/or copied only with
 * the written permission of Exigen Group
 * or in accordance with the terms and conditions
 * stipulated in the agreement/contract under which
 * the program(s) have been supplied.
 */
///////////////////////////////////////////////////////////////////////////////
import org.openl.ie.tools.ReusableImpl;

/**
 * A generic implementation of the Undo interface.
 */

public class UndoImpl extends ReusableImpl implements Undo {
    // private boolean _undone_flag;
    protected Undoable _undoable;

    /**
     * Returns a String representation of this object.
     *
     * @return a String representation of this object.
     */
    @Override
    public String toString() {
        return "UNDO";
    }

    @Override
    public void undo() {
        free();
    }

    @Override
    public Undoable undoable() {
        return _undoable;
    }

    @Override
    public void undoable(Undoable u) {
        _undoable = u;
    }

} // ~UndoImpl