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| org.apache.commons.jexl.parser.ParseException | 
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| 1 |  /* | |
| 2 |   * Copyright 2002-2006 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 |  /* Generated By:JavaCC: Do not edit this line. ParseException.java Version 2.1 */ | |
| 17 |  package org.apache.commons.jexl.parser; | |
| 18 | ||
| 19 |  /** | |
| 20 |   * This exception is thrown when parse errors are encountered. You can | |
| 21 |   * explicitly create objects of this exception type by calling the method | |
| 22 |   * generateParseException in the generated parser. | |
| 23 |   *  | |
| 24 |   * You can modify this class to customize your error reporting mechanisms so | |
| 25 |   * long as you retain the public fields. | |
| 26 |   */ | |
| 27 | public class ParseException extends Exception { | |
| 28 | ||
| 29 |      /** serialization version id jdk13 generated. */ | |
| 30 | static final long serialVersionUID = 654626477565941968L; | |
| 31 | ||
| 32 |      /** | |
| 33 |       * This constructor is used by the method "generateParseException" in the | |
| 34 |       * generated parser. Calling this constructor generates a new object of this | |
| 35 |       * type with the fields "currentToken", "expectedTokenSequences", and | |
| 36 |       * "tokenImage" set. The boolean flag "specialConstructor" is also set to | |
| 37 |       * true to indicate that this constructor was used to create this object. | |
| 38 |       * This constructor calls its super class with the empty string to force the | |
| 39 |       * "toString" method of parent class "Throwable" to print the error message | |
| 40 |       * in the form: ParseException: (result of getMessage) | |
| 41 |       */ | |
| 42 | public ParseException(Token currentTokenVal, int[][] expectedTokenSequencesVal, String[] tokenImageVal) { | |
| 43 | 3 | super(""); | 
| 44 | 3 |          specialConstructor = true; | 
| 45 | 3 | currentToken = currentTokenVal; | 
| 46 | 3 | expectedTokenSequences = expectedTokenSequencesVal; | 
| 47 | 3 | tokenImage = tokenImageVal; | 
| 48 | 3 | } | 
| 49 | ||
| 50 |      /** | |
| 51 |       * The following constructors are for use by you for whatever purpose you | |
| 52 |       * can think of. Constructing the exception in this manner makes the | |
| 53 |       * exception behave in the normal way - i.e., as documented in the class | |
| 54 |       * "Throwable". The fields "errorToken", "expectedTokenSequences", and | |
| 55 |       * "tokenImage" do not contain relevant information. The JavaCC generated | |
| 56 |       * code does not use these constructors. | |
| 57 |       */ | |
| 58 | ||
| 59 |      public ParseException() { | |
| 60 | 0 |          super(); | 
| 61 | 0 |          specialConstructor = false; | 
| 62 | 0 |      } | 
| 63 | ||
| 64 |      public ParseException(String message) { | |
| 65 | 3 |          super(message); | 
| 66 | 3 | specialConstructor = false; | 
| 67 | 3 | } | 
| 68 | ||
| 69 |      /** | |
| 70 |       * This variable determines which constructor was used to create this object | |
| 71 |       * and thereby affects the semantics of the "getMessage" method (see below). | |
| 72 |       */ | |
| 73 | protected boolean specialConstructor; | |
| 74 | ||
| 75 |      /** | |
| 76 |       * This is the last token that has been consumed successfully. If this | |
| 77 |       * object has been created due to a parse error, the token followng this | |
| 78 |       * token will (therefore) be the first error token. | |
| 79 |       */ | |
| 80 |      public Token currentToken; | |
| 81 | ||
| 82 |      /** | |
| 83 |       * Each entry in this array is an array of integers. Each array of integers | |
| 84 |       * represents a sequence of tokens (by their ordinal values) that is | |
| 85 |       * expected at this point of the parse. | |
| 86 |       */ | |
| 87 | public int[][] expectedTokenSequences; | |
| 88 | ||
| 89 |      /** | |
| 90 |       * This is a reference to the "tokenImage" array of the generated parser | |
| 91 |       * within which the parse error occurred. This array is defined in the | |
| 92 |       * generated ...Constants interface. | |
| 93 |       */ | |
| 94 |      public String[] tokenImage; | |
| 95 | ||
| 96 |      /** | |
| 97 |       * This method has the standard behavior when this object has been created | |
| 98 |       * using the standard constructors. Otherwise, it uses "currentToken" and | |
| 99 |       * "expectedTokenSequences" to generate a parse error message and returns | |
| 100 |       * it. If this object has been created due to a parse error, and you do not | |
| 101 |       * catch it (it gets thrown from the parser), then this method is called | |
| 102 |       * during the printing of the final stack trace, and hence the correct error | |
| 103 |       * message gets displayed. | |
| 104 |       */ | |
| 105 |      public String getMessage() { | |
| 106 | 0 |          if (!specialConstructor) { | 
| 107 | 0 |              return super.getMessage(); | 
| 108 | } | |
| 109 | 0 |          String expected = ""; | 
| 110 | 0 |          int maxSize = 0; | 
| 111 | 0 |          for (int i = 0; i < expectedTokenSequences.length; i++) { | 
| 112 | 0 |              if (maxSize < expectedTokenSequences[i].length) { | 
| 113 | 0 |                  maxSize = expectedTokenSequences[i].length; | 
| 114 | } | |
| 115 | 0 |              for (int j = 0; j < expectedTokenSequences[i].length; j++) { | 
| 116 | 0 |                  expected += tokenImage[expectedTokenSequences[i][j]] + " "; | 
| 117 | } | |
| 118 | 0 |              if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) { | 
| 119 | 0 |                  expected += "..."; | 
| 120 | } | |
| 121 | 0 |              expected += eol + "    "; | 
| 122 | } | |
| 123 | 0 |          String retval = "Encountered \""; | 
| 124 | 0 |          Token tok = currentToken.next; | 
| 125 | 0 |          for (int i = 0; i < maxSize; i++) { | 
| 126 | 0 |              if (i != 0) | 
| 127 | 0 |                  retval += " "; | 
| 128 | 0 |              if (tok.kind == 0) { | 
| 129 | 0 |                  retval += tokenImage[0]; | 
| 130 | 0 |                  break; | 
| 131 | } | |
| 132 | 0 |              retval += add_escapes(tok.image); | 
| 133 | 0 |              tok = tok.next; | 
| 134 | } | |
| 135 | 0 |          retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn; | 
| 136 | 0 |          retval += "." + eol; | 
| 137 | 0 |          if (expectedTokenSequences.length == 1) { | 
| 138 | 0 |              retval += "Was expecting:" + eol + "    "; | 
| 139 |          } else { | |
| 140 | 0 |              retval += "Was expecting one of:" + eol + "    "; | 
| 141 | } | |
| 142 | 0 |          retval += expected; | 
| 143 | 0 |          return retval; | 
| 144 | } | |
| 145 | ||
| 146 |      /** | |
| 147 |       * The end of line string for this machine. | |
| 148 |       */ | |
| 149 | 6 | protected String eol = System.getProperty("line.separator", "\n"); | 
| 150 | ||
| 151 |      /** | |
| 152 |       * Used to convert raw characters to their escaped version when these raw | |
| 153 |       * version cannot be used as part of an ASCII string literal. | |
| 154 |       */ | |
| 155 |      protected String add_escapes(String str) { | |
| 156 | 0 |          StringBuffer retval = new StringBuffer(); | 
| 157 |          char ch; | |
| 158 | 0 |          for (int i = 0; i < str.length(); i++) { | 
| 159 | 0 |              switch (str.charAt(i)) { | 
| 160 |                  case 0: | |
| 161 | 0 |                      continue; | 
| 162 |                  case '\b': | |
| 163 | 0 |                      retval.append("\\b"); | 
| 164 | 0 |                      continue; | 
| 165 |                  case '\t': | |
| 166 | 0 |                      retval.append("\\t"); | 
| 167 | 0 |                      continue; | 
| 168 |                  case '\n': | |
| 169 | 0 |                      retval.append("\\n"); | 
| 170 | 0 |                      continue; | 
| 171 |                  case '\f': | |
| 172 | 0 |                      retval.append("\\f"); | 
| 173 | 0 |                      continue; | 
| 174 |                  case '\r': | |
| 175 | 0 |                      retval.append("\\r"); | 
| 176 | 0 |                      continue; | 
| 177 |                  case '\"': | |
| 178 | 0 |                      retval.append("\\\""); | 
| 179 | 0 |                      continue; | 
| 180 |                  case '\'': | |
| 181 | 0 |                      retval.append("\\\'"); | 
| 182 | 0 |                      continue; | 
| 183 |                  case '\\': | |
| 184 | 0 |                      retval.append("\\\\"); | 
| 185 | 0 |                      continue; | 
| 186 |                  default: | |
| 187 | 0 |                      if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) { | 
| 188 | 0 |                          String s = "0000" + Integer.toString(ch, 16); | 
| 189 | 0 |                          retval.append("\\u").append(s.substring(s.length() - 4, s.length())); | 
| 190 |                      } else { | |
| 191 | 0 |                          retval.append(ch); | 
| 192 | } | |
| 193 |                      continue; | |
| 194 | } | |
| 195 | } | |
| 196 | 0 |          return retval.toString(); | 
| 197 | } | |
| 198 | ||
| 199 | } | 
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