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1   /* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */
2   /*** 
3    * JSP Parser for PMD.
4    * @author Pieter � Application Engineers NV/SA � http://www.ae.be
5    */
6   
7   package net.sourceforge.pmd.jsp.ast;
8   
9   public class TokenMgrError extends RuntimeException {
10      /*
11       * Ordinals for various reasons why an Error of this type can be thrown.
12       */
13  
14      /***
15       * Lexical error occured.
16       */
17      static final int LEXICAL_ERROR = 0;
18  
19      /***
20       * An attempt wass made to create a second instance of a static token manager.
21       */
22      static final int STATIC_LEXER_ERROR = 1;
23  
24      /***
25       * Tried to change to an invalid lexical state.
26       */
27      static final int INVALID_LEXICAL_STATE = 2;
28  
29      /***
30       * Detected (and bailed out of) an infinite loop in the token manager.
31       */
32      static final int LOOP_DETECTED = 3;
33  
34      /***
35       * Indicates the reason why the exception is thrown. It will have
36       * one of the above 4 values.
37       */
38      int errorCode;
39  
40      /***
41       * Replaces unprintable characters by their espaced (or unicode escaped)
42       * equivalents in the given string
43       */
44      protected static final String addEscapes(String str) {
45          StringBuffer retval = new StringBuffer();
46          char ch;
47          for (int i = 0; i < str.length(); i++) {
48              switch (str.charAt(i)) {
49                  case 0:
50                      continue;
51                  case '\b':
52                      retval.append("//b");
53                      continue;
54                  case '\t':
55                      retval.append("//t");
56                      continue;
57                  case '\n':
58                      retval.append("//n");
59                      continue;
60                  case '\f':
61                      retval.append("//f");
62                      continue;
63                  case '\r':
64                      retval.append("//r");
65                      continue;
66                  case '\"':
67                      retval.append("//\"");
68                      continue;
69                  case '\'':
70                      retval.append("//\'");
71                      continue;
72                  case '//':
73                      retval.append("////");
74                      continue;
75                  default:
76                      if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
77                          String s = "0000" + Integer.toString(ch, 16);
78                          retval.append("//u" + s.substring(s.length() - 4, s.length()));
79                      } else {
80                          retval.append(ch);
81                      }
82                      continue;
83              }
84          }
85          return retval.toString();
86      }
87  
88      /***
89       * Returns a detailed message for the Error when it is thrown by the
90       * token manager to indicate a lexical error.
91       * Parameters :
92       * EOFSeen     : indicates if EOF caused the lexicl error
93       * curLexState : lexical state in which this error occured
94       * errorLine   : line number when the error occured
95       * errorColumn : column number when the error occured
96       * errorAfter  : prefix that was seen before this error occured
97       * curchar     : the offending character
98       * Note: You can customize the lexical error message by modifying this method.
99       */
100     protected static String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) {
101         return ("Lexical error at line " +
102                 errorLine + ", column " +
103                 errorColumn + ".  Encountered: " +
104                 (EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int) curChar + "), ") +
105                 "after : \"" + addEscapes(errorAfter) + "\"");
106     }
107 
108     /***
109      * You can also modify the body of this method to customize your error messages.
110      * For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
111      * of end-users concern, so you can return something like :
112      * <p/>
113      * "Internal Error : Please file a bug report .... "
114      * <p/>
115      * from this method for such cases in the release version of your parser.
116      */
117     public String getMessage() {
118         return super.getMessage();
119     }
120 
121     /*
122      * Constructors of various flavors follow.
123      */
124 
125     public TokenMgrError() {
126     }
127 
128     public TokenMgrError(String message, int reason) {
129         super(message);
130         errorCode = reason;
131     }
132 
133     public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) {
134         this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
135     }
136 }