MapNumberer


1   /* Soot - a J*va Optimization Framework
2    * Copyright (C) 2004 Ondrej Lhotak
3    *
4    * This library is free software; you can redistribute it and/or
5    * modify it under the terms of the GNU Lesser General Public
6    * License as published by the Free Software Foundation; either
7    * version 2.1 of the License, or (at your option) any later version.
8    *
9    * This library is distributed in the hope that it will be useful,
10   * but WITHOUT ANY WARRANTY; without even the implied warranty of
11   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   * Lesser General Public License for more details.
13   *
14   * You should have received a copy of the GNU Lesser General Public
15   * License along with this library; if not, write to the
16   * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17   * Boston, MA 02111-1307, USA.
18   */
19  
20  package soot.util;
21  import java.util.*;
22  
23  public class MapNumberer implements Numberer {
24      Map map = new HashMap();
25      ArrayList al = new ArrayList();
26      int nextIndex = 1;
27      public void add( Object   o ) {
28          if( !map.containsKey(o) ) {
29              map.put( o, new Integer  (nextIndex) );
30              al.add(o);
31              nextIndex++;
32          }
33      }
34      public Object   get( long number ) {
35          return al.get((int) number);
36      }
37      public long get( Object   o ) {
38          if( o == null ) return 0;
39          Integer   i = (Integer  ) map.get(o);
40          if( i == null ) throw new RuntimeException  ( "couldn't find "+o );
41          return i.intValue();
42      }
43      public int size() { return nextIndex; }
44      public MapNumberer() { al.add(null); }
45      public boolean contains(Object   o) { return map.containsKey(o); }
46  }
47
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