001:/* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */
002:package de.gulden.util.javasource.jjt;
003:
004:public class TokenMgrError extends Error
005:{
006: /*
007: * Ordinals for various reasons why an Error of this type can be thrown.
008: */
009:
010: /**
011: * Lexical error occured.
012: */
013: static final int LEXICAL_ERROR = 0;
014:
015: /**
016: * An attempt wass made to create a second instance of a static token manager.
017: */
018: static final int STATIC_LEXER_ERROR = 1;
019:
020: /**
021: * Tried to change to an invalid lexical state.
022: */
023: static final int INVALID_LEXICAL_STATE = 2;
024:
025: /**
026: * Detected (and bailed out of) an infinite loop in the token manager.
027: */
028: static final int LOOP_DETECTED = 3;
029:
030: /**
031: * Indicates the reason why the exception is thrown. It will have
032: * one of the above 4 values.
033: */
034: int errorCode;
035:
036: /**
037: * Replaces unprintable characters by their espaced (or unicode escaped)
038: * equivalents in the given string
039: */
040: protected static final String addEscapes(String str) {
041: StringBuffer retval = new StringBuffer();
042: char ch;
043: for (int i = 0; i < str.length(); i++) {
044: switch (str.charAt(i))
045: {
046: case 0 :
047: continue;
048: case '\b':
049: retval.append("\\b");
050: continue;
051: case '\t':
052: retval.append("\\t");
053: continue;
054: case '\n':
055: retval.append("\\n");
056: continue;
057: case '\f':
058: retval.append("\\f");
059: continue;
060: case '\r':
061: retval.append("\\r");
062: continue;
063: case '\"':
064: retval.append("\\\"");
065: continue;
066: case '\'':
067: retval.append("\\\'");
068: continue;
069: case '\\':
070: retval.append("\\\\");
071: continue;
072: default:
073: if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
074: String s = "0000" + Integer.toString(ch, 16);
075: retval.append("\\u" + s.substring(s.length() - 4, s.length()));
076: } else {
077: retval.append(ch);
078: }
079: continue;
080: }
081: }
082: return retval.toString();
083: }
084:
085: /**
086: * Returns a detailed message for the Error when it is thrown by the
087: * token manager to indicate a lexical error.
088: * Parameters :
089: * EOFSeen : indicates if EOF caused the lexicl error
090: * curLexState : lexical state in which this error occured
091: * errorLine : line number when the error occured
092: * errorColumn : column number when the error occured
093: * errorAfter : prefix that was seen before this error occured
094: * curchar : the offending character
095: * Note: You can customize the lexical error message by modifying this method.
096: */
097: protected static String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) {
098: return("Lexical error at line " +
099: 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:}
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