/* $Id: CriticOclEvaluator.java 17830 2010-01-12 18:56:20Z linus $
 *****************************************************************************
 * Copyright (c) 2009 Contributors - see below
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    tfmorris
 *****************************************************************************
 *
 * Some portions of this file was previously release using the BSD License:
 */

// Copyright (c) 1996-2007 The Regents of the University of California. All
// Rights Reserved. Permission to use, copy, modify, and distribute this
// software and its documentation without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph appear in all copies.  This software program and
// documentation are copyrighted by The Regents of the University of
// California. The software program and documentation are supplied "AS
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// does not warrant that the operation of the program will be
// uninterrupted or error-free. The end-user understands that the program
// was developed for research purposes and is advised not to rely
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package org.argouml.ocl;

import org.tigris.gef.ocl.ExpansionException;


/**
 * CriticOclEvaluator is singleton version of OCLEvaluator which is used for
 * evaluating simple OCL expressions used in the critiques.<p>
 * 
 * Implementation History: As best I was able to reconstruct the history in
 * early 2007, OclEvaluator was originally implemented as a singleton, but that
 * was changed in September, 2004 because of some perceived problems, but then
 * it was discovered that the Critic subsystem depended on the singleton
 * pattern, so an earlier version of OclEvaluator was reintroduced with a new
 * name. Because of the large amount of duplicate code between the two classes,
 * this was refactored in March, 2007 to use an instance of the main
 * OclEvaluator class.
 * 
 * @stereotype singleton
 * @deprecated for 0.25.2 by tfmorris - use {@link OCLEvaluator}
 */
@Deprecated
public class CriticOclEvaluator {

    private static final CriticOclEvaluator INSTANCE =
        new CriticOclEvaluator();

    private static final OCLEvaluator EVALUATOR =
        new OCLEvaluator();
    
    private CriticOclEvaluator() {
        // no instantiations
    }

    /**
     * @return the singleton of CriticOclEvaluator
     */
    public static final CriticOclEvaluator getInstance() {
        return INSTANCE;
    }

    /*
     * @see OCLEvaluator#evalToString(java.lang.Object, java.lang.String)
     */
    public synchronized String evalToString(Object self, String expr)
        throws ExpansionException {
        
        return EVALUATOR.evalToString(self, expr);
    }

    /*
     * @see OCLEvaluator#evalToString(java.lang.Object, java.lang.String, java.lang.String)
     */
    public synchronized String evalToString(
            Object self,
            String expr,
            String sep)
    	throws ExpansionException {
        
        return EVALUATOR.evalToString(self, expr, sep);
    }

}