MultiIdentifierMatcher


1   /* MultiIdentifierMatcher Copyright (C) 1999-2002 Jochen Hoenicke.
2    *
3    * This program is free software; you can redistribute it and/or modify
4    * it under the terms of the GNU General Public License as published by
5    * the Free Software Foundation; either version 2, or (at your option)
6    * any later version.
7    *
8    * This program is distributed in the hope that it will be useful,
9    * but WITHOUT ANY WARRANTY; without even the implied warranty of
10   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11   * GNU General Public License for more details.
12   *
13   * You should have received a copy of the GNU General Public License
14   * along with this program; see the file COPYING.  If not, write to
15   * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
16   *
17   * $Id: MultiIdentifierMatcher.java.in,v 1.1.2.2 2002/05/28 17:34:17 hoenicke Exp $
18   */
19  
20  package jode.obfuscator.modules;
21  import jode.obfuscator.*;
22  import java.util.Collection  ;
23  
24  public class MultiIdentifierMatcher implements IdentifierMatcher, OptionHandler {
25      /**
26       * Useful constant for giving to the constructor.
27       */
28      public static boolean OR = true;
29      /**
30       * Useful constant for giving to the constructor.
31       */
32      public static boolean AND = false;
33  
34      IdentifierMatcher[] matchers;
35      boolean isOr;
36  
37      /**
38       * Create an empty MultiIdentifierMatcher.
39       */
40      public MultiIdentifierMatcher() {
41      this.matchers = new IdentifierMatcher[0];
42      }
43  
44      /**
45       * Create an IdentifierMatcher out of other matchers.
46       * @param isOr if true, match should return the logical (shortcut)
47       * or of the underlying matchers, if false it returns the logical and.
48       * @param matchers the underlying matchers
49       */
50      public MultiIdentifierMatcher(boolean isOr, 
51                    IdentifierMatcher[] matchers) {
52      this.isOr = isOr;
53      this.matchers = matchers;
54      }
55  
56      public void setOption(String   option, Collection   values) {
57      if (option.equals("or")) {
58          isOr = true;
59          matchers = (IdentifierMatcher[])
60          values.toArray(new IdentifierMatcher[values.size()]);
61      } else if (option.equals("and")) {
62          isOr = false;
63          matchers = (IdentifierMatcher[])
64          values.toArray(new IdentifierMatcher[values.size()]);
65      } else
66          throw new IllegalArgumentException  ("Invalid option `"+option+"'.");
67      }
68      
69  
70      public boolean matches(Identifier ident) {
71      for (int i=0; i< matchers.length; i++) {
72          if (matchers[i].matches(ident) == isOr)
73          return isOr;
74      }
75      return !isOr;
76      }
77  
78      public boolean matchesSub(Identifier ident, String   name) {
79      for (int i=0; i< matchers.length; i++) {
80          if (matchers[i].matchesSub(ident, name) == isOr)
81          return isOr;
82      }
83      return !isOr;
84      }
85  
86      public String   getNextComponent(Identifier ident) {
87      if (isOr == AND) {
88          for (int i=0; i< matchers.length; i++) {
89          String   next = matchers[i].getNextComponent(ident);
90          if (next != null && matchesSub(ident, next))
91              return next;
92          }
93          return null;
94      }
95      // OR case
96      String   next = null;
97      for (int i = 0; i < matchers.length; i++) {
98          if (!matchesSub(ident, null))
99          continue;
100         if (next != null
101         && !matchers[i].getNextComponent(ident).equals(next))
102         return null;
103         next = matchers[i].getNextComponent(ident);
104         if (next == null)
105         return null;
106     }
107     return next;
108     }
109 }
110 
111
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags