1 | /* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 2.1 */ |
2 | package org.apache.velocity.runtime.parser; |
3 | |
4 | public class TokenMgrError extends Error |
5 | { |
6 | /* |
7 | * Ordinals for various reasons why an Error of this type can be thrown. |
8 | */ |
9 | |
10 | /** |
11 | * Lexical error occured. |
12 | */ |
13 | static final int LEXICAL_ERROR = 0; |
14 | |
15 | /** |
16 | * An attempt wass made to create a second instance of a static token manager. |
17 | */ |
18 | static final int STATIC_LEXER_ERROR = 1; |
19 | |
20 | /** |
21 | * Tried to change to an invalid lexical state. |
22 | */ |
23 | static final int INVALID_LEXICAL_STATE = 2; |
24 | |
25 | /** |
26 | * Detected (and bailed out of) an infinite loop in the token manager. |
27 | */ |
28 | static final int LOOP_DETECTED = 3; |
29 | |
30 | /** |
31 | * Indicates the reason why the exception is thrown. It will have |
32 | * one of the above 4 values. |
33 | */ |
34 | int errorCode; |
35 | |
36 | /** |
37 | * Replaces unprintable characters by their espaced (or unicode escaped) |
38 | * equivalents in the given string |
39 | */ |
40 | protected static final String addEscapes(String str) { |
41 | StringBuffer retval = new StringBuffer(); |
42 | char ch; |
43 | for (int i = 0; i < str.length(); i++) { |
44 | switch (str.charAt(i)) |
45 | { |
46 | case 0 : |
47 | continue; |
48 | case '\b': |
49 | retval.append("\\b"); |
50 | continue; |
51 | case '\t': |
52 | retval.append("\\t"); |
53 | continue; |
54 | case '\n': |
55 | retval.append("\\n"); |
56 | continue; |
57 | case '\f': |
58 | retval.append("\\f"); |
59 | continue; |
60 | case '\r': |
61 | retval.append("\\r"); |
62 | continue; |
63 | case '\"': |
64 | retval.append("\\\""); |
65 | continue; |
66 | case '\'': |
67 | retval.append("\\\'"); |
68 | continue; |
69 | case '\\': |
70 | retval.append("\\\\"); |
71 | continue; |
72 | default: |
73 | if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) { |
74 | String s = "0000" + Integer.toString(ch, 16); |
75 | retval.append("\\u" + s.substring(s.length() - 4, s.length())); |
76 | } else { |
77 | retval.append(ch); |
78 | } |
79 | continue; |
80 | } |
81 | } |
82 | return retval.toString(); |
83 | } |
84 | |
85 | /** |
86 | * Returns a detailed message for the Error when it is thrown by the |
87 | * token manager to indicate a lexical error. |
88 | * Parameters : |
89 | * EOFSeen : indicates if EOF caused the lexicl error |
90 | * curLexState : lexical state in which this error occured |
91 | * errorLine : line number when the error occured |
92 | * errorColumn : column number when the error occured |
93 | * errorAfter : prefix that was seen before this error occured |
94 | * curchar : the offending character |
95 | * Note: You can customize the lexical error message by modifying this method. |
96 | */ |
97 | private static final String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) { |
98 | return("Lexical error at line " + |
99 | errorLine + ", column " + |
100 | errorColumn + ". Encountered: " + |
101 | (EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int)curChar + "), ") + |
102 | "after : \"" + addEscapes(errorAfter) + "\""); |
103 | } |
104 | |
105 | /** |
106 | * You can also modify the body of this method to customize your error messages. |
107 | * For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not |
108 | * of end-users concern, so you can return something like : |
109 | * |
110 | * "Internal Error : Please file a bug report .... " |
111 | * |
112 | * from this method for such cases in the release version of your parser. |
113 | */ |
114 | public String getMessage() { |
115 | return super.getMessage(); |
116 | } |
117 | |
118 | /* |
119 | * Constructors of various flavors follow. |
120 | */ |
121 | |
122 | public TokenMgrError() { |
123 | } |
124 | |
125 | public TokenMgrError(String message, int reason) { |
126 | super(message); |
127 | errorCode = reason; |
128 | } |
129 | |
130 | public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) { |
131 | this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason); |
132 | } |
133 | } |