KeywordRenamer.java :  » Development » jode » jode » obfuscator » modules » Java Open Source

/* KeywordRenamer Copyright (C) 1999-2002 Jochen Hoenicke.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * $Id: KeywordRenamer.java.in,v 1.2.2.1 2002/05/28 17:34:17 hoenicke Exp $
 */

package jode.obfuscator.modules;
import jode.obfuscator.*;
import java.util.Collection;
import java.util.Iterator;
import java.lang.UnsupportedOperationException;

public class KeywordRenamer implements Renamer, OptionHandler {
    String keywords[];
    Renamer backup;

    public KeywordRenamer() {
  keywords = new String[] {
      "if", "else", "for", "while", "throw", "return",
      "class", "interface", "implements", "extends",
      "instanceof", "new",
      "int", "boolean", "long", "float", "double", "short", 
      "public", "protected", "private", 
      "static", "synchronized", "strict", "transient", "abstract",
      "volatile", "final",
      /* Not really keywords, but very confusing anyway. */
      "Object", "String", "Thread", "Runnable", "StringBuffer", "Vector"
  };
  backup = new StrongRenamer();
    }

    public void setOption(String option, Collection values) {
  if (option.startsWith("keywords")) {
      keywords = (String[]) values.toArray(new String[values.size()]);
  } else if (option.startsWith("backup")) {
      if (values.size() != 1)
    throw new IllegalArgumentException
        ("Only one backup is allowed");
      backup = (Renamer) values.iterator().next();
  } else
      throw new IllegalArgumentException("Invalid option `"+option+"'");
    }

    public Iterator generateNames(final Identifier ident) {
  return new Iterator() {
      int pos = 0;
      Iterator backing = null;

      public boolean hasNext() {
    return true;
      }
      public Object next() {
    if (pos < keywords.length)
        return keywords[pos++];
    
    if (backing == null)
        backing = backup.generateNames(ident);

    return backing.next();
      }

      public void remove() {
    throw new UnsupportedOperationException();
      }
  };
    }
}