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ChooseExpr.java

package edu.ksu.cis.bandera.bir;

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Bandera, a Java(TM) analysis and transformation toolkit           *
 * Copyright (C) 1998, 1999   James Corbett (corbett@hawaii.edu)     *
 * All rights reserved.                                              *
 *                                                                   *
 * This work was done as a project in the SAnToS Laboratory,         *
 * Department of Computing and Information Sciences, Kansas State    *
 * University, USA (http://www.cis.ksu.edu/santos).                  *
 * It is understood that any modification not identified as such is  *
 * not covered by the preceding statement.                           *
 *                                                                   *
 * This work is free software; you can redistribute it and/or        *
 * modify it under the terms of the GNU Library General Public       *
 * License as published by the Free Software Foundation; either      *
 * version 2 of the License, or (at your option) any later version.  *
 *                                                                   *
 * This work 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 *
 * Library General Public License for more details.                  *
 *                                                                   *
 * You should have received a copy of the GNU Library General Public *
 * License along with this toolkit; if not, write to the             *
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,      *
 * Boston, MA  02111-1307, USA.                                      *
 *                                                                   *
 * Java is a trademark of Sun Microsystems, Inc.                     *
 *                                                                   *
 * To submit a bug report, send a comment, or get the latest news on *
 * this project and other SAnToS projects, please visit the web-site *
 *                http://www.cis.ksu.edu/santos                      *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
import java.util.Vector;

import ca.mcgill.sable.util.*;

/**
 * An expression value representing a nondeterministic choice among
 * a (nonempty) set of values of a given type.
 */

public class ChooseExpr implements Expr {
   
    Vector choices;
    Type type;

    public ChooseExpr(Expr firstChoice) {
    choices = new Vector();
    choices.addElement(firstChoice);
    type = firstChoice.getType();
    }
    public void addChoice(Expr choice) {
    choices.addElement(choice);
    }
    public void apply(Switch sw)
    {
        ((ExprSwitch) sw).caseChooseExpr(this);
    }
    public Object clone() {
    ChooseExpr expr = new ChooseExpr((Expr)choices.elementAt(0));
    for (int i = 1; i < choices.size(); i++) 
        expr.addChoice((Expr)choices.elementAt(i));
    return expr;
    }
    public Literal getChoice(int choiceNum) {
    return (Literal) choices.elementAt(choiceNum);
    }
    public Vector getChoices() { return choices; }
    public Type getType() { return type; }
    public void print() {
    System.out.print("choice");
    }
}

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