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org.apache.commons.jexl.parser.ParseException |
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1 | /* |
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2 | * Copyright 2002-2006 The Apache Software Foundation. |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | */ |
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16 | /* Generated By:JavaCC: Do not edit this line. ParseException.java Version 2.1 */ |
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17 | package org.apache.commons.jexl.parser; |
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18 | ||
19 | /** |
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20 | * This exception is thrown when parse errors are encountered. You can |
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21 | * explicitly create objects of this exception type by calling the method |
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22 | * generateParseException in the generated parser. |
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23 | * |
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24 | * You can modify this class to customize your error reporting mechanisms so |
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25 | * long as you retain the public fields. |
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26 | */ |
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27 | public class ParseException extends Exception { |
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28 | ||
29 | /** serialization version id jdk13 generated. */ |
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30 | static final long serialVersionUID = 654626477565941968L; |
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31 | ||
32 | /** |
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33 | * This constructor is used by the method "generateParseException" in the |
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34 | * generated parser. Calling this constructor generates a new object of this |
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35 | * type with the fields "currentToken", "expectedTokenSequences", and |
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36 | * "tokenImage" set. The boolean flag "specialConstructor" is also set to |
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37 | * true to indicate that this constructor was used to create this object. |
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38 | * This constructor calls its super class with the empty string to force the |
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39 | * "toString" method of parent class "Throwable" to print the error message |
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40 | * in the form: ParseException: (result of getMessage) |
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41 | */ |
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42 | public ParseException(Token currentTokenVal, int[][] expectedTokenSequencesVal, String[] tokenImageVal) { |
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43 | 3 | super(""); |
44 | 3 | specialConstructor = true; |
45 | 3 | currentToken = currentTokenVal; |
46 | 3 | expectedTokenSequences = expectedTokenSequencesVal; |
47 | 3 | tokenImage = tokenImageVal; |
48 | 3 | } |
49 | ||
50 | /** |
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51 | * The following constructors are for use by you for whatever purpose you |
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52 | * can think of. Constructing the exception in this manner makes the |
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53 | * exception behave in the normal way - i.e., as documented in the class |
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54 | * "Throwable". The fields "errorToken", "expectedTokenSequences", and |
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55 | * "tokenImage" do not contain relevant information. The JavaCC generated |
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56 | * code does not use these constructors. |
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57 | */ |
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58 | ||
59 | public ParseException() { |
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60 | 0 | super(); |
61 | 0 | specialConstructor = false; |
62 | 0 | } |
63 | ||
64 | public ParseException(String message) { |
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65 | 3 | super(message); |
66 | 3 | specialConstructor = false; |
67 | 3 | } |
68 | ||
69 | /** |
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70 | * This variable determines which constructor was used to create this object |
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71 | * and thereby affects the semantics of the "getMessage" method (see below). |
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72 | */ |
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73 | protected boolean specialConstructor; |
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74 | ||
75 | /** |
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76 | * This is the last token that has been consumed successfully. If this |
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77 | * object has been created due to a parse error, the token followng this |
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78 | * token will (therefore) be the first error token. |
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79 | */ |
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80 | public Token currentToken; |
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81 | ||
82 | /** |
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83 | * Each entry in this array is an array of integers. Each array of integers |
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84 | * represents a sequence of tokens (by their ordinal values) that is |
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85 | * expected at this point of the parse. |
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86 | */ |
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87 | public int[][] expectedTokenSequences; |
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88 | ||
89 | /** |
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90 | * This is a reference to the "tokenImage" array of the generated parser |
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91 | * within which the parse error occurred. This array is defined in the |
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92 | * generated ...Constants interface. |
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93 | */ |
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94 | public String[] tokenImage; |
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95 | ||
96 | /** |
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97 | * This method has the standard behavior when this object has been created |
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98 | * using the standard constructors. Otherwise, it uses "currentToken" and |
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99 | * "expectedTokenSequences" to generate a parse error message and returns |
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100 | * it. If this object has been created due to a parse error, and you do not |
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101 | * catch it (it gets thrown from the parser), then this method is called |
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102 | * during the printing of the final stack trace, and hence the correct error |
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103 | * message gets displayed. |
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104 | */ |
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105 | public String getMessage() { |
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106 | 0 | if (!specialConstructor) { |
107 | 0 | return super.getMessage(); |
108 | } |
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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 | } |
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115 | 0 | for (int j = 0; j < expectedTokenSequences[i].length; j++) { |
116 | 0 | expected += tokenImage[expectedTokenSequences[i][j]] + " "; |
117 | } |
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118 | 0 | if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) { |
119 | 0 | expected += "..."; |
120 | } |
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121 | 0 | expected += eol + " "; |
122 | } |
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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 | } |
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132 | 0 | retval += add_escapes(tok.image); |
133 | 0 | tok = tok.next; |
134 | } |
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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 { |
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140 | 0 | retval += "Was expecting one of:" + eol + " "; |
141 | } |
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142 | 0 | retval += expected; |
143 | 0 | return retval; |
144 | } |
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145 | ||
146 | /** |
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147 | * The end of line string for this machine. |
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148 | */ |
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149 | 6 | protected String eol = System.getProperty("line.separator", "\n"); |
150 | ||
151 | /** |
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152 | * Used to convert raw characters to their escaped version when these raw |
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153 | * version cannot be used as part of an ASCII string literal. |
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154 | */ |
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155 | protected String add_escapes(String str) { |
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156 | 0 | StringBuffer retval = new StringBuffer(); |
157 | char ch; |
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158 | 0 | for (int i = 0; i < str.length(); i++) { |
159 | 0 | switch (str.charAt(i)) { |
160 | case 0: |
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161 | 0 | continue; |
162 | case '\b': |
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163 | 0 | retval.append("\\b"); |
164 | 0 | continue; |
165 | case '\t': |
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166 | 0 | retval.append("\\t"); |
167 | 0 | continue; |
168 | case '\n': |
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169 | 0 | retval.append("\\n"); |
170 | 0 | continue; |
171 | case '\f': |
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172 | 0 | retval.append("\\f"); |
173 | 0 | continue; |
174 | case '\r': |
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175 | 0 | retval.append("\\r"); |
176 | 0 | continue; |
177 | case '\"': |
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178 | 0 | retval.append("\\\""); |
179 | 0 | continue; |
180 | case '\'': |
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181 | 0 | retval.append("\\\'"); |
182 | 0 | continue; |
183 | case '\\': |
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184 | 0 | retval.append("\\\\"); |
185 | 0 | continue; |
186 | default: |
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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 { |
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191 | 0 | retval.append(ch); |
192 | } |
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193 | continue; |
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194 | } |
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195 | } |
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196 | 0 | return retval.toString(); |
197 | } |
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198 | ||
199 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |