001 /* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 2.1 */
002 package org.activemq.selector;
003
004 public class TokenMgrError extends Error {
005 /*
006 * Ordinals for various reasons why an Error of this type can be thrown.
007 */
008
009 /**
010 * Lexical error occured.
011 */
012 static final int LEXICAL_ERROR = 0;
013
014 /**
015 * An attempt wass made to create a second instance of a static token manager.
016 */
017 static final int STATIC_LEXER_ERROR = 1;
018
019 /**
020 * Tried to change to an invalid lexical state.
021 */
022 static final int INVALID_LEXICAL_STATE = 2;
023
024 /**
025 * Detected (and bailed out of) an infinite loop in the token manager.
026 */
027 static final int LOOP_DETECTED = 3;
028
029 /**
030 * Indicates the reason why the exception is thrown. It will have
031 * one of the above 4 values.
032 */
033 int errorCode;
034
035 /**
036 * Replaces unprintable characters by their espaced (or unicode escaped)
037 * equivalents in the given string
038 */
039 protected static final String addEscapes(String str) {
040 StringBuffer retval = new StringBuffer();
041 char ch;
042 for (int i = 0; i < str.length(); i++) {
043 switch (str.charAt(i)) {
044 case 0:
045 continue;
046 case '\b':
047 retval.append("\\b");
048 continue;
049 case '\t':
050 retval.append("\\t");
051 continue;
052 case '\n':
053 retval.append("\\n");
054 continue;
055 case '\f':
056 retval.append("\\f");
057 continue;
058 case '\r':
059 retval.append("\\r");
060 continue;
061 case '\"':
062 retval.append("\\\"");
063 continue;
064 case '\'':
065 retval.append("\\\'");
066 continue;
067 case '\\':
068 retval.append("\\\\");
069 continue;
070 default:
071 if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
072 String s = "0000" + Integer.toString(ch, 16);
073 retval.append("\\u" + s.substring(s.length() - 4, s.length()));
074 }
075 else {
076 retval.append(ch);
077 }
078 continue;
079 }
080 }
081 return retval.toString();
082 }
083
084 /**
085 * Returns a detailed message for the Error when it is thrown by the
086 * token manager to indicate a lexical error.
087 * Parameters :
088 * EOFSeen : indicates if EOF caused the lexicl error
089 * curLexState : lexical state in which this error occured
090 * errorLine : line number when the error occured
091 * errorColumn : column number when the error occured
092 * errorAfter : prefix that was seen before this error occured
093 * curchar : the offending character
094 * Note: You can customize the lexical error message by modifying this method.
095 */
096 private static final String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) {
097 return ("Lexical error at line " +
098 errorLine + ", column " +
099 errorColumn + ". Encountered: " +
100 (EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int) curChar + "), ") +
101 "after : \"" + addEscapes(errorAfter) + "\"");
102 }
103
104 /**
105 * You can also modify the body of this method to customize your error messages.
106 * For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
107 * of end-users concern, so you can return something like :
108 * <p/>
109 * "Internal Error : Please file a bug report .... "
110 * <p/>
111 * from this method for such cases in the release version of your parser.
112 */
113 public String getMessage() {
114 return super.getMessage();
115 }
116
117 /*
118 * Constructors of various flavors follow.
119 */
120
121 public TokenMgrError() {
122 }
123
124 public TokenMgrError(String message, int reason) {
125 super(message);
126 errorCode = reason;
127 }
128
129 public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) {
130 this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
131 }
132 }