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1   /* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */
2   package net.sourceforge.pmd.ast;
3   
4   public class TokenMgrError extends RuntimeException {
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 addEscapes(String str) {
40          StringBuffer retval = new StringBuffer();
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 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      protected static String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String 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      * <p/>
108      * "Internal Error : Please file a bug report .... "
109      * <p/>
110      * from this method for such cases in the release version of your parser.
111      */
112     public String 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 message, int reason) {
124         super(message);
125         errorCode = reason;
126     }
127 
128     public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) {
129         this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
130     }
131 }