1 /* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */
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 protected static 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 }