beagled/Lucene.Net/QueryParser/TokenMgrError.cs

   1 /*
   2  * Copyright 2004 The Apache Software Foundation
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 /* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */
  18
  19 using System;
  20
  21 namespace Lucene.Net.QueryParsers
  22 {
  23
  24         [Serializable]
  25         public class TokenMgrError:System.ApplicationException
  26         {
  27                 /// <summary> You can also modify the body of this method to customize your error messages.
  28                 /// For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
  29                 /// of end-users concern, so you can return something like :
  30                 ///
  31                 /// "Internal Error : Please file a bug report .... "
  32                 ///
  33                 /// from this method for such cases in the release version of your parser.
  34                 /// </summary>
  35                 public override System.String Message
  36                 {
  37                         get
  38                         {
  39                                 return base.Message;
  40                         }
  41
  42                 }
  43                 /*
  44                 * Ordinals for various reasons why an Error of this type can be thrown.
  45                 */
  46
  47                 /// <summary> Lexical error occured.</summary>
  48                 internal const int LEXICAL_ERROR = 0;
  49
  50                 /// <summary> An attempt wass made to create a second instance of a static token manager.</summary>
  51                 internal const int STATIC_LEXER_ERROR = 1;
  52
  53                 /// <summary> Tried to change to an invalid lexical state.</summary>
  54                 internal const int INVALID_LEXICAL_STATE = 2;
  55
  56                 /// <summary> Detected (and bailed out of) an infinite loop in the token manager.</summary>
  57                 internal const int LOOP_DETECTED = 3;
  58
  59                 /// <summary> Indicates the reason why the exception is thrown. It will have
  60                 /// one of the above 4 values.
  61                 /// </summary>
  62                 internal int errorCode;
  63
  64                 /// <summary> Replaces unprintable characters by their espaced (or unicode escaped)
  65                 /// equivalents in the given string
  66                 /// </summary>
  67                 protected internal static System.String addEscapes(System.String str)
  68                 {
  69                         System.Text.StringBuilder retval = new System.Text.StringBuilder();
  70                         char ch;
  71                         for (int i = 0; i < str.Length; i++)
  72                         {
  73                                 switch (str[i])
  74                                 {
  75
  76                                         case (char) (0):
  77                                                 continue;
  78
  79                                         case '\b':
  80                                                 retval.Append("\\b");
  81                                                 continue;
  82
  83                                         case '\t':
  84                                                 retval.Append("\\t");
  85                                                 continue;
  86
  87                                         case '\n':
  88                                                 retval.Append("\\n");
  89                                                 continue;
  90
  91                                         case '\f':
  92                                                 retval.Append("\\f");
  93                                                 continue;
  94
  95                                         case '\r':
  96                                                 retval.Append("\\r");
  97                                                 continue;
  98
  99                                         case '\"':
 100                                                 retval.Append("\\\"");
 101                                                 continue;
 102
 103                                         case '\'':
 104                                                 retval.Append("\\\'");
 105                                                 continue;
 106
 107                                         case '\\':
 108                                                 retval.Append("\\\\");
 109                                                 continue;
 110
 111                                         default:
 112                                                 if ((ch = str[i]) < 0x20 || ch > 0x7e)
 113                                                 {
 114                                                         System.String s = "0000" + System.Convert.ToString(ch, 16);
 115                                                         retval.Append("\\u" + s.Substring(s.Length - 4, (s.Length) - (s.Length - 4)));
 116                                                 }
 117                                                 else
 118                                                 {
 119                                                         retval.Append(ch);
 120                                                 }
 121                                                 continue;
 122
 123                                 }
 124                         }
 125                         return retval.ToString();
 126                 }
 127
 128                 /// <summary> Returns a detailed message for the Error when it is thrown by the
 129                 /// token manager to indicate a lexical error.
 130                 /// Parameters :
 131                 /// EOFSeen     : indicates if EOF caused the lexicl error
 132                 /// curLexState : lexical state in which this error occured
 133                 /// errorLine   : line number when the error occured
 134                 /// errorColumn : column number when the error occured
 135                 /// errorAfter  : prefix that was seen before this error occured
 136                 /// curchar     : the offending character
 137                 /// Note: You can customize the lexical error message by modifying this method.
 138                 /// </summary>
 139                 protected internal static System.String LexicalError(bool EOFSeen, int lexState, int errorLine, int errorColumn, System.String errorAfter, char curChar)
 140                 {
 141                         return ("Lexical error at line " + errorLine + ", column " + errorColumn + ".  Encountered: " + (EOFSeen?"<EOF> ":("\"" + addEscapes(System.Convert.ToString(curChar)) + "\"") + " (" + (int) curChar + "), ") + "after : \"" + addEscapes(errorAfter) + "\"");
 142                 }
 143
 144                 /*
 145                 * Constructors of various flavors follow.
 146                 */
 147
 148                 public TokenMgrError()
 149                 {
 150                 }
 151
 152                 public TokenMgrError(System.String message, int reason):base(message)
 153                 {
 154                         errorCode = reason;
 155                 }
 156
 157                 public TokenMgrError(bool EOFSeen, int lexState, int errorLine, int errorColumn, System.String errorAfter, char curChar, int reason):this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason)
 158                 {
 159                 }
 160         }
 161 }