01: /* Soot - a J*va Optimization Framework
02: * Copyright (C) 2002 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: /** A class that numbers strings, so they can be placed in bitsets.
25: *
26: * @author Ondrej Lhotak
27: */
28:
29: public class StringNumberer extends ArrayNumberer {
30: HashMap<String, NumberedString> stringToNumbered = new HashMap<String, NumberedString>(
31: 1024);
32:
33: public NumberedString find(String s) {
34: NumberedString ret = stringToNumbered.get(s);
35: if (ret == null) {
36: stringToNumbered.put(s, ret = new NumberedString(s));
37: add(ret);
38: }
39: return ret;
40: }
41:
42: public NumberedString findOrAdd(String s) {
43: NumberedString ret = stringToNumbered.get(s);
44: if (ret == null) {
45: stringToNumbered.put(s, ret = new NumberedString(s));
46: add(ret);
47: }
48: return ret;
49: }
50: }
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