1 /* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */ 2 /* 3 * Copyright 2004 the mime4j project 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.james.mime4j.field.datetime.parser; 18 19 public class TokenMgrError extends Error 20 { 21 /* 22 * Ordinals for various reasons why an Error of this type can be thrown. 23 */ 24 25 /** 26 * Lexical error occured. 27 */ 28 static final int LEXICAL_ERROR = 0; 29 30 /** 31 * An attempt wass made to create a second instance of a static token manager. 32 */ 33 static final int STATIC_LEXER_ERROR = 1; 34 35 /** 36 * Tried to change to an invalid lexical state. 37 */ 38 static final int INVALID_LEXICAL_STATE = 2; 39 40 /** 41 * Detected (and bailed out of) an infinite loop in the token manager. 42 */ 43 static final int LOOP_DETECTED = 3; 44 45 /** 46 * Indicates the reason why the exception is thrown. It will have 47 * one of the above 4 values. 48 */ 49 int errorCode; 50 51 /** 52 * Replaces unprintable characters by their espaced (or unicode escaped) 53 * equivalents in the given string 54 */ 55 protected static final String addEscapes(String str) { 56 StringBuffer retval = new StringBuffer(); 57 char ch; 58 for (int i = 0; i < str.length(); i++) { 59 switch (str.charAt(i)) 60 { 61 case 0 : 62 continue; 63 case '\b': 64 retval.append("\\b"); 65 continue; 66 case '\t': 67 retval.append("\\t"); 68 continue; 69 case '\n': 70 retval.append("\\n"); 71 continue; 72 case '\f': 73 retval.append("\\f"); 74 continue; 75 case '\r': 76 retval.append("\\r"); 77 continue; 78 case '\"': 79 retval.append("\\\""); 80 continue; 81 case '\'': 82 retval.append("\\\'"); 83 continue; 84 case '\\': 85 retval.append("\\\\"); 86 continue; 87 default: 88 if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) { 89 String s = "0000" + Integer.toString(ch, 16); 90 retval.append("\\u" + s.substring(s.length() - 4, s.length())); 91 } else { 92 retval.append(ch); 93 } 94 continue; 95 } 96 } 97 return retval.toString(); 98 } 99 100 /** 101 * Returns a detailed message for the Error when it is thrown by the 102 * token manager to indicate a lexical error. 103 * Parameters : 104 * EOFSeen : indicates if EOF caused the lexicl error 105 * curLexState : lexical state in which this error occured 106 * errorLine : line number when the error occured 107 * errorColumn : column number when the error occured 108 * errorAfter : prefix that was seen before this error occured 109 * curchar : the offending character 110 * Note: You can customize the lexical error message by modifying this method. 111 */ 112 protected static String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) { 113 return("Lexical error at line " + 114 errorLine + ", column " + 115 errorColumn + ". Encountered: " + 116 (EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int)curChar + "), ") + 117 "after : \"" + addEscapes(errorAfter) + "\""); 118 } 119 120 /** 121 * You can also modify the body of this method to customize your error messages. 122 * For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not 123 * of end-users concern, so you can return something like : 124 * 125 * "Internal Error : Please file a bug report .... " 126 * 127 * from this method for such cases in the release version of your parser. 128 */ 129 public String getMessage() { 130 return super.getMessage(); 131 } 132 133 /* 134 * Constructors of various flavors follow. 135 */ 136 137 public TokenMgrError() { 138 } 139 140 public TokenMgrError(String message, int reason) { 141 super(message); 142 errorCode = reason; 143 } 144 145 public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) { 146 this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason); 147 } 148 } 149