1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */
package org.incava.java;
public class TokenMgrError extends Error
{
/*
* Ordinals for various reasons why an Error of this type can be thrown.
*/
/**
* Lexical error occured.
*/
static final int LEXICAL_ERROR = 0;
/**
* An attempt wass made to create a second instance of a static token manager.
*/
static final int STATIC_LEXER_ERROR = 1;
/**
* Tried to change to an invalid lexical state.
*/
static final int INVALID_LEXICAL_STATE = 2;
/**
* Detected (and bailed out of) an infinite loop in the token manager.
*/
static final int LOOP_DETECTED = 3;
/**
* Indicates the reason why the exception is thrown. It will have
* one of the above 4 values.
*/
int errorCode;
/**
* Replaces unprintable characters by their espaced (or unicode escaped)
* equivalents in the given string
*/
protected static final String addEscapes(String str) {
StringBuffer retval = new StringBuffer();
char ch;
for (int i = 0; i < str.length(); i++) {
switch (str.charAt(i))
{
case 0 :
continue;
case '\b':
retval.append("\\b");
continue;
case '\t':
retval.append("\\t");
continue;
case '\n':
retval.append("\\n");
continue;
case '\f':
retval.append("\\f");
continue;
case '\r':
retval.append("\\r");
continue;
case '\"':
retval.append("\\\"");
continue;
case '\'':
retval.append("\\\'");
continue;
case '\\':
retval.append("\\\\");
continue;
default:
if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
String s = "0000" + Integer.toString(ch, 16);
retval.append("\\u" + s.substring(s.length() - 4, s.length()));
} else {
retval.append(ch);
}
continue;
}
}
return retval.toString();
}
/**
* Returns a detailed message for the Error when it is thrown by the
* token manager to indicate a lexical error.
* Parameters :
* EOFSeen : indicates if EOF caused the lexicl error
* curLexState : lexical state in which this error occured
* errorLine : line number when the error occured
* errorColumn : column number when the error occured
* errorAfter : prefix that was seen before this error occured
* curchar : the offending character
* Note: You can customize the lexical error message by modifying this method.
*/
protected static String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) {
return("Lexical error at line " +
errorLine + ", column " +
errorColumn + ". Encountered: " +
(EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int)curChar + "), ") +
"after : \"" + addEscapes(errorAfter) + "\"");
}
/**
* You can also modify the body of this method to customize your error messages.
* For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
* of end-users concern, so you can return something like :
*
* "Internal Error : Please file a bug report .... "
*
* from this method for such cases in the release version of your parser.
*/
public String getMessage() {
return super.getMessage();
}
/*
* Constructors of various flavors follow.
*/
public TokenMgrError() {
}
public TokenMgrError(String message, int reason) {
super(message);
errorCode = reason;
}
public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) {
this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
}
}
|
