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Java > Open Source Codes > org > objectweb > speedo > query > parser > TokenMgrError


1 /* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 2.1 */
2 package org.objectweb.speedo.query.parser;
3
4 public class TokenMgrError extends Error JavaDoc {
5     /*
6      * Ordinals for various reasons why an Error of this type can be thrown.
7      */
8
9     /**
10      * Lexical error occured.
11      */
12     static final int LEXICAL_ERROR = 0;
13
14     /**
15      * An attempt wass made to create a second instance of a static token manager.
16      */
17     static final int STATIC_LEXER_ERROR = 1;
18
19     /**
20      * Tried to change to an invalid lexical state.
21      */
22     static final int INVALID_LEXICAL_STATE = 2;
23
24     /**
25      * Detected (and bailed out of) an infinite loop in the token manager.
26      */
27     static final int LOOP_DETECTED = 3;
28
29     /**
30      * Indicates the reason why the exception is thrown. It will have
31      * one of the above 4 values.
32      */
33     int errorCode;
34
35     /**
36      * Replaces unprintable characters by their espaced (or unicode escaped)
37      * equivalents in the given string
38      */
39     protected static final String JavaDoc addEscapes(String JavaDoc str) {
40         StringBuffer JavaDoc retval = new StringBuffer JavaDoc();
41         char ch;
42         for (int i = 0; i < str.length(); i++) {
43             switch (str.charAt(i)) {
44             case 0:
45                 continue;
46             case '\b':
47                 retval.append("\\b");
48                 continue;
49             case '\t':
50                 retval.append("\\t");
51                 continue;
52             case '\n':
53                 retval.append("\\n");
54                 continue;
55             case '\f':
56                 retval.append("\\f");
57                 continue;
58             case '\r':
59                 retval.append("\\r");
60                 continue;
61             case '\"':
62                 retval.append("\\\"");
63                 continue;
64             case '\'':
65                 retval.append("\\\'");
66                 continue;
67             case '\\':
68                 retval.append("\\\\");
69                 continue;
70             default:
71                 if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
72                     String JavaDoc s = "0000" + Integer.toString(ch, 16);
73                     retval.append("\\u" + s.substring(s.length() - 4, s.length()));
74                 } else {
75                     retval.append(ch);
76                 }
77                 continue;
78             }
79         }
80         return retval.toString();
81     }
82
83     /**
84      * Returns a detailed message for the Error when it is thrown by the
85      * token manager to indicate a lexical error.
86      * Parameters :
87      * EOFSeen : indicates if EOF caused the lexicl error
88      * curLexState : lexical state in which this error occured
89      * errorLine : line number when the error occured
90      * errorColumn : column number when the error occured
91      * errorAfter : prefix that was seen before this error occured
92      * curchar : the offending character
93      * Note: You can customize the lexical error message by modifying this method.
94      */
95     private static final String JavaDoc LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String JavaDoc errorAfter, char curChar) {
96         return ("Lexical error at line " +
97                 errorLine + ", column " +
98                 errorColumn + ". Encountered: " +
99                 (EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int) curChar + "), ") +
100                 "after : \"" + addEscapes(errorAfter) + "\"");
101     }
102
103     /**
104      * You can also modify the body of this method to customize your error messages.
105      * For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
106      * of end-users concern, so you can return something like :
107      *
108      * "Internal Error : Please file a bug report .... "
109      *
110      * from this method for such cases in the release version of your parser.
111      */
112     public String JavaDoc getMessage() {
113         return super.getMessage();
114     }
115
116     /*
117      * Constructors of various flavors follow.
118      */
119
120     public TokenMgrError() {
121     }
122
123     public TokenMgrError(String JavaDoc message, int reason) {
124         super(message);
125         errorCode = reason;
126     }
127
128     public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String JavaDoc errorAfter, char curChar, int reason) {
129         this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
130     }
131 }
132
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