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SmvList.java

package edu.ksu.cis.bandera.smv;

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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.io.*;
import java.util.*;

public class SmvList {

    String operator;
    String identity;
    boolean skip;
    Vector elements;

    public SmvList(String operator, String identity, boolean skip) {
    this.operator = operator;
    this.identity = identity;
    this.skip = skip;
    elements = new Vector();
    }
    public void add(Object o) {
    elements.addElement(o);
    }
    void indent(PrintWriter out, int level) {
    out.println();
    for (int i = 0; i < level; i++)
        out.print("  ");
    }
    public void print(PrintWriter out) {
    out.print("  ");
    print(out, 1);
    }
    void print(PrintWriter out, int level) {
    if (elements.size() == 0) 
        out.print(identity);
    else if (elements.size() == 1) 
        printElement(out, level, elements.elementAt(0));
    else {
        out.print("( ");
        printElement(out, level, elements.elementAt(0));
        for (int i = 1; i < elements.size(); i++) {
        indent(out, level);
        out.print(operator + " ");
        if (skip) indent(out, level + 1);
        printElement(out, level, elements.elementAt(i));
        }
        out.print(" )");
    }       
    }
    void printElement(PrintWriter out, int level, Object element) {
    if (element instanceof SmvList) 
        ((SmvList)element).print(out, level + 1);
    else
        out.print(element);
    }
}

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