01: /* Soot - a J*va Optimization Framework
02: * Copyright (C) 2004 Ondrej Lhotak
03: *
04: * This library is free software; you can redistribute it and/or
05: * modify it under the terms of the GNU Lesser General Public
06: * License as published by the Free Software Foundation; either
07: * version 2.1 of the License, or (at your option) any later version.
08: *
09: * 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:
22: import java.util.*;
23:
24: public class MapNumberer implements Numberer {
25: Map<Object, Integer> map = new HashMap<Object, Integer>();
26: ArrayList<Object> al = new ArrayList<Object>();
27: int nextIndex = 1;
28:
29: public void add(Object o) {
30: if (!map.containsKey(o)) {
31: map.put(o, new Integer(nextIndex));
32: al.add(o);
33: nextIndex++;
34: }
35: }
36:
37: public Object get(long number) {
38: return al.get((int) number);
39: }
40:
41: public long get(Object o) {
42: if (o == null)
43: return 0;
44: Integer i = map.get(o);
45: if (i == null)
46: throw new RuntimeException("couldn't find " + o);
47: return i.intValue();
48: }
49:
50: public int size() {
51: return nextIndex;
52: }
53:
54: public MapNumberer() {
55: al.add(null);
56: }
57:
58: public boolean contains(Object o) {
59: return map.containsKey(o);
60: }
61: }
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