001 /* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 5.0 */
002 /* JavaCCOptions: */
003 package org.apache.commons.ognl;
004
005 /** Token Manager Error. */
006 public class TokenMgrError extends Error
007 {
008
009 /**
010 * The version identifier for this Serializable class.
011 * Increment only if the <i>serialized</i> form of the
012 * class changes.
013 */
014 private static final long serialVersionUID = 1L;
015
016 /*
017 * Ordinals for various reasons why an Error of this type can be thrown.
018 */
019
020 /**
021 * Lexical error occurred.
022 */
023 static final int LEXICAL_ERROR = 0;
024
025 /**
026 * An attempt was made to create a second instance of a static token manager.
027 */
028 static final int STATIC_LEXER_ERROR = 1;
029
030 /**
031 * Tried to change to an invalid lexical state.
032 */
033 static final int INVALID_LEXICAL_STATE = 2;
034
035 /**
036 * Detected (and bailed out of) an infinite loop in the token manager.
037 */
038 static final int LOOP_DETECTED = 3;
039
040 /**
041 * Indicates the reason why the exception is thrown. It will have
042 * one of the above 4 values.
043 */
044 int errorCode;
045
046 /**
047 * Replaces unprintable characters by their escaped (or unicode escaped)
048 * equivalents in the given string
049 */
050 protected static final String addEscapes(String str) {
051 StringBuffer retval = new StringBuffer();
052 char ch;
053 for (int i = 0; i < str.length(); i++) {
054 switch (str.charAt(i))
055 {
056 case 0 :
057 continue;
058 case '\b':
059 retval.append("\\b");
060 continue;
061 case '\t':
062 retval.append("\\t");
063 continue;
064 case '\n':
065 retval.append("\\n");
066 continue;
067 case '\f':
068 retval.append("\\f");
069 continue;
070 case '\r':
071 retval.append("\\r");
072 continue;
073 case '\"':
074 retval.append("\\\"");
075 continue;
076 case '\'':
077 retval.append("\\\'");
078 continue;
079 case '\\':
080 retval.append("\\\\");
081 continue;
082 default:
083 if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
084 String s = "0000" + Integer.toString(ch, 16);
085 retval.append("\\u" + s.substring(s.length() - 4, s.length()));
086 } else {
087 retval.append(ch);
088 }
089 continue;
090 }
091 }
092 return retval.toString();
093 }
094
095 /**
096 * Returns a detailed message for the Error when it is thrown by the
097 * token manager to indicate a lexical error.
098 * Parameters :
099 * EOFSeen : indicates if EOF caused the lexical error
100 * curLexState : lexical state in which this error occurred
101 * errorLine : line number when the error occurred
102 * errorColumn : column number when the error occurred
103 * errorAfter : prefix that was seen before this error occurred
104 * curchar : the offending character
105 * Note: You can customize the lexical error message by modifying this method.
106 */
107 protected static String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) {
108 return("Lexical error at line " +
109 errorLine + ", column " +
110 errorColumn + ". Encountered: " +
111 (EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int)curChar + "), ") +
112 "after : \"" + addEscapes(errorAfter) + "\"");
113 }
114
115 /**
116 * You can also modify the body of this method to customize your error messages.
117 * For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
118 * of end-users concern, so you can return something like :
119 *
120 * "Internal Error : Please file a bug report .... "
121 *
122 * from this method for such cases in the release version of your parser.
123 */
124 public String getMessage() {
125 return super.getMessage();
126 }
127
128 /*
129 * Constructors of various flavors follow.
130 */
131
132 /** No arg constructor. */
133 public TokenMgrError() {
134 }
135
136 /** Constructor with message and reason. */
137 public TokenMgrError(String message, int reason) {
138 super(message);
139 errorCode = reason;
140 }
141
142 /** Full Constructor. */
143 public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) {
144 this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
145 }
146 }
147 /* JavaCC - OriginalChecksum=88836de4775361194d75316d54f0bfad (do not edit this line) */