001 /* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 4.1 */
002 /* JavaCCOptions: */
003 package net.sourceforge.pmd.lang.ast;
004
005 /** Token Manager Error. */
006 public class TokenMgrError extends RuntimeException
007 {
008
009 /*
010 * Ordinals for various reasons why an Error of this type can be thrown.
011 */
012
013 /**
014 * Lexical error occurred.
015 */
016 public static final int LEXICAL_ERROR = 0;
017
018 /**
019 * An attempt was made to create a second instance of a static token manager.
020 */
021 public static final int STATIC_LEXER_ERROR = 1;
022
023 /**
024 * Tried to change to an invalid lexical state.
025 */
026 public static final int INVALID_LEXICAL_STATE = 2;
027
028 /**
029 * Detected (and bailed out of) an infinite loop in the token manager.
030 */
031 public static final int LOOP_DETECTED = 3;
032
033 /**
034 * Indicates the reason why the exception is thrown. It will have
035 * one of the above 4 values.
036 */
037 int errorCode;
038
039 /**
040 * Replaces unprintable characters by their escaped (or unicode escaped)
041 * equivalents in the given string
042 */
043 protected static final String addEscapes(String str) {
044 StringBuffer retval = new StringBuffer();
045 char ch;
046 for (int i = 0; i < str.length(); i++) {
047 switch (str.charAt(i))
048 {
049 case 0 :
050 continue;
051 case '\b':
052 retval.append("\\b");
053 continue;
054 case '\t':
055 retval.append("\\t");
056 continue;
057 case '\n':
058 retval.append("\\n");
059 continue;
060 case '\f':
061 retval.append("\\f");
062 continue;
063 case '\r':
064 retval.append("\\r");
065 continue;
066 case '\"':
067 retval.append("\\\"");
068 continue;
069 case '\'':
070 retval.append("\\\'");
071 continue;
072 case '\\':
073 retval.append("\\\\");
074 continue;
075 default:
076 if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
077 String s = "0000" + Integer.toString(ch, 16);
078 retval.append("\\u" + s.substring(s.length() - 4, s.length()));
079 } else {
080 retval.append(ch);
081 }
082 continue;
083 }
084 }
085 return retval.toString();
086 }
087
088 /**
089 * Returns a detailed message for the Error when it is thrown by the
090 * token manager to indicate a lexical error.
091 * Parameters :
092 * EOFSeen : indicates if EOF caused the lexical error
093 * curLexState : lexical state in which this error occurred
094 * errorLine : line number when the error occurred
095 * errorColumn : column number when the error occurred
096 * errorAfter : prefix that was seen before this error occurred
097 * curchar : the offending character
098 * Note: You can customize the lexical error message by modifying this method.
099 */
100 protected static String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) {
101 return("Lexical error in file " + AbstractTokenManager.getFileName() + " 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 *
113 * "Internal Error : Please file a bug report .... "
114 *
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 /** No arg constructor. */
126 public TokenMgrError() {
127 }
128
129 /** Constructor with message and reason. */
130 public TokenMgrError(String message, int reason) {
131 super(message);
132 errorCode = reason;
133 }
134
135 /** Full Constructor. */
136 public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) {
137 this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
138 }
139 }
140 /* JavaCC - OriginalChecksum=887ef629387efaf1cf31f0dc7c077049 (do not edit this line) */
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