1 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
|
---|
2 | * JFlex 1.4.3 *
|
---|
3 | * Copyright (C) 1998-2009 Gerwin Klein <[email protected]> *
|
---|
4 | * All rights reserved. *
|
---|
5 | * *
|
---|
6 | * This program is free software; you can redistribute it and/or modify *
|
---|
7 | * it under the terms of the GNU General Public License. See the file *
|
---|
8 | * COPYRIGHT for more information. *
|
---|
9 | * *
|
---|
10 | * This program is distributed in the hope that it will be useful, *
|
---|
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of *
|
---|
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
|
---|
13 | * GNU General Public License for more details. *
|
---|
14 | * *
|
---|
15 | * You should have received a copy of the GNU General Public License along *
|
---|
16 | * with this program; if not, write to the Free Software Foundation, Inc., *
|
---|
17 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
|
---|
18 | * *
|
---|
19 | * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
---|
20 |
|
---|
21 | package JFlex;
|
---|
22 |
|
---|
23 | import java.util.*;
|
---|
24 |
|
---|
25 |
|
---|
26 | /**
|
---|
27 | * A simple table to store EOF actions for each lexical state.
|
---|
28 | *
|
---|
29 | * @author Gerwin Klein
|
---|
30 | * @version JFlex 1.4.3, $Revision: 433 $, $Date: 2009-01-31 19:52:34 +1100 (Sat, 31 Jan 2009) $
|
---|
31 | */
|
---|
32 | public class EOFActions {
|
---|
33 |
|
---|
34 | /** maps lexical states to actions */
|
---|
35 | private Hashtable /* Integer -> Action */ actions = new Hashtable();
|
---|
36 | private Action defaultAction;
|
---|
37 | private int numLexStates;
|
---|
38 |
|
---|
39 | public void setNumLexStates(int num) {
|
---|
40 | numLexStates = num;
|
---|
41 | }
|
---|
42 |
|
---|
43 | public void add(Vector stateList, Action action) {
|
---|
44 |
|
---|
45 | if (stateList != null && stateList.size() > 0) {
|
---|
46 | Enumeration states = stateList.elements();
|
---|
47 |
|
---|
48 | while (states.hasMoreElements())
|
---|
49 | add( (Integer) states.nextElement(), action );
|
---|
50 | }
|
---|
51 | else {
|
---|
52 | defaultAction = action.getHigherPriority(defaultAction);
|
---|
53 |
|
---|
54 | for (int i = 0; i < numLexStates; i++) {
|
---|
55 | Integer state = new Integer(i);
|
---|
56 | if ( actions.get(state) != null ) {
|
---|
57 | Action oldAction = (Action) actions.get(state);
|
---|
58 | actions.put(state, oldAction.getHigherPriority(action));
|
---|
59 | }
|
---|
60 | }
|
---|
61 | }
|
---|
62 | }
|
---|
63 |
|
---|
64 | public void add(Integer state, Action action) {
|
---|
65 | if ( actions.get(state) == null )
|
---|
66 | actions.put(state, action);
|
---|
67 | else {
|
---|
68 | Action oldAction = (Action) actions.get(state);
|
---|
69 | actions.put(state, oldAction.getHigherPriority(action));
|
---|
70 | }
|
---|
71 | }
|
---|
72 |
|
---|
73 | public boolean isEOFAction(Object a) {
|
---|
74 | if (a == defaultAction) return true;
|
---|
75 |
|
---|
76 | Enumeration e = actions.elements();
|
---|
77 | while ( e.hasMoreElements() )
|
---|
78 | if (a == e.nextElement()) return true;
|
---|
79 |
|
---|
80 | return false;
|
---|
81 | }
|
---|
82 |
|
---|
83 | public Action getAction(int state) {
|
---|
84 | return (Action) actions.get(new Integer(state));
|
---|
85 | }
|
---|
86 |
|
---|
87 | public Action getDefault() {
|
---|
88 | return defaultAction;
|
---|
89 | }
|
---|
90 |
|
---|
91 | public int numActions() {
|
---|
92 | return actions.size();
|
---|
93 | }
|
---|
94 | }
|
---|