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