Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
ParseException |
|
| 5.4;5.4 |
1 | /* Generated By:JavaCC: Do not edit this line. ParseException.java Version 2.1 */ | |
2 | package org.apache.commons.el.parser; | |
3 | ||
4 | /** | |
5 | * This exception is thrown when parse errors are encountered. | |
6 | * You can explicitly create objects of this exception type by | |
7 | * calling the method generateParseException in the generated | |
8 | * parser. | |
9 | * | |
10 | * You can modify this class to customize your error reporting | |
11 | * mechanisms so long as you retain the public fields. | |
12 | */ | |
13 | public class ParseException extends Exception { | |
14 | ||
15 | /** | |
16 | * This constructor is used by the method "generateParseException" | |
17 | * in the generated parser. Calling this constructor generates | |
18 | * a new object of this type with the fields "currentToken", | |
19 | * "expectedTokenSequences", and "tokenImage" set. The boolean | |
20 | * flag "specialConstructor" is also set to true to indicate that | |
21 | * this constructor was used to create this object. | |
22 | * This constructor calls its super class with the empty string | |
23 | * to force the "toString" method of parent class "Throwable" to | |
24 | * print the error message in the form: | |
25 | * ParseException: <result of getMessage> | |
26 | */ | |
27 | public ParseException(Token currentTokenVal, | |
28 | int[][] expectedTokenSequencesVal, | |
29 | String[] tokenImageVal | |
30 | ) | |
31 | { | |
32 | 0 | super(""); |
33 | 0 | specialConstructor = true; |
34 | 0 | currentToken = currentTokenVal; |
35 | 0 | expectedTokenSequences = expectedTokenSequencesVal; |
36 | 0 | tokenImage = tokenImageVal; |
37 | 0 | } |
38 | ||
39 | /** | |
40 | * The following constructors are for use by you for whatever | |
41 | * purpose you can think of. Constructing the exception in this | |
42 | * manner makes the exception behave in the normal way - i.e., as | |
43 | * documented in the class "Throwable". The fields "errorToken", | |
44 | * "expectedTokenSequences", and "tokenImage" do not contain | |
45 | * relevant information. The JavaCC generated code does not use | |
46 | * these constructors. | |
47 | */ | |
48 | ||
49 | public ParseException() { | |
50 | 0 | super(); |
51 | 0 | specialConstructor = false; |
52 | 0 | } |
53 | ||
54 | public ParseException(String message) { | |
55 | 0 | super(message); |
56 | 0 | specialConstructor = false; |
57 | 0 | } |
58 | ||
59 | /** | |
60 | * This variable determines which constructor was used to create | |
61 | * this object and thereby affects the semantics of the | |
62 | * "getMessage" method (see below). | |
63 | */ | |
64 | protected boolean specialConstructor; | |
65 | ||
66 | /** | |
67 | * This is the last token that has been consumed successfully. If | |
68 | * this object has been created due to a parse error, the token | |
69 | * followng this token will (therefore) be the first error token. | |
70 | */ | |
71 | public Token currentToken; | |
72 | ||
73 | /** | |
74 | * Each entry in this array is an array of integers. Each array | |
75 | * of integers represents a sequence of tokens (by their ordinal | |
76 | * values) that is expected at this point of the parse. | |
77 | */ | |
78 | public int[][] expectedTokenSequences; | |
79 | ||
80 | /** | |
81 | * This is a reference to the "tokenImage" array of the generated | |
82 | * parser within which the parse error occurred. This array is | |
83 | * defined in the generated ...Constants interface. | |
84 | */ | |
85 | public String[] tokenImage; | |
86 | ||
87 | /** | |
88 | * This method has the standard behavior when this object has been | |
89 | * created using the standard constructors. Otherwise, it uses | |
90 | * "currentToken" and "expectedTokenSequences" to generate a parse | |
91 | * error message and returns it. If this object has been created | |
92 | * due to a parse error, and you do not catch it (it gets thrown | |
93 | * from the parser), then this method is called during the printing | |
94 | * of the final stack trace, and hence the correct error message | |
95 | * gets displayed. | |
96 | */ | |
97 | public String getMessage() { | |
98 | 0 | if (!specialConstructor) { |
99 | 0 | return super.getMessage(); |
100 | } | |
101 | 0 | String expected = ""; |
102 | 0 | int maxSize = 0; |
103 | 0 | for (int i = 0; i < expectedTokenSequences.length; i++) { |
104 | 0 | if (maxSize < expectedTokenSequences[i].length) { |
105 | 0 | maxSize = expectedTokenSequences[i].length; |
106 | } | |
107 | 0 | for (int j = 0; j < expectedTokenSequences[i].length; j++) { |
108 | 0 | expected += tokenImage[expectedTokenSequences[i][j]] + " "; |
109 | } | |
110 | 0 | if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) { |
111 | 0 | expected += "..."; |
112 | } | |
113 | 0 | expected += eol + " "; |
114 | } | |
115 | 0 | String retval = "Encountered \""; |
116 | 0 | Token tok = currentToken.next; |
117 | 0 | for (int i = 0; i < maxSize; i++) { |
118 | 0 | if (i != 0) retval += " "; |
119 | 0 | if (tok.kind == 0) { |
120 | 0 | retval += tokenImage[0]; |
121 | 0 | break; |
122 | } | |
123 | 0 | retval += add_escapes(tok.image); |
124 | 0 | tok = tok.next; |
125 | } | |
126 | 0 | retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn; |
127 | 0 | retval += "." + eol; |
128 | 0 | if (expectedTokenSequences.length == 1) { |
129 | 0 | retval += "Was expecting:" + eol + " "; |
130 | } else { | |
131 | 0 | retval += "Was expecting one of:" + eol + " "; |
132 | } | |
133 | 0 | retval += expected; |
134 | 0 | return retval; |
135 | } | |
136 | ||
137 | /** | |
138 | * The end of line string for this machine. | |
139 | */ | |
140 | 0 | protected String eol = System.getProperty("line.separator", "\n"); |
141 | ||
142 | /** | |
143 | * Used to convert raw characters to their escaped version | |
144 | * when these raw version cannot be used as part of an ASCII | |
145 | * string literal. | |
146 | */ | |
147 | protected String add_escapes(String str) { | |
148 | 0 | StringBuffer retval = new StringBuffer(); |
149 | char ch; | |
150 | 0 | for (int i = 0, length = str.length(); i < length; i++) { |
151 | 0 | switch (str.charAt(i)) |
152 | { | |
153 | case 0 : | |
154 | 0 | continue; |
155 | case '\b': | |
156 | 0 | retval.append("\\b"); |
157 | 0 | continue; |
158 | case '\t': | |
159 | 0 | retval.append("\\t"); |
160 | 0 | continue; |
161 | case '\n': | |
162 | 0 | retval.append("\\n"); |
163 | 0 | continue; |
164 | case '\f': | |
165 | 0 | retval.append("\\f"); |
166 | 0 | continue; |
167 | case '\r': | |
168 | 0 | retval.append("\\r"); |
169 | 0 | continue; |
170 | case '\"': | |
171 | 0 | retval.append("\\\""); |
172 | 0 | continue; |
173 | case '\'': | |
174 | 0 | retval.append("\\\'"); |
175 | 0 | continue; |
176 | case '\\': | |
177 | 0 | retval.append("\\\\"); |
178 | 0 | continue; |
179 | default: | |
180 | 0 | if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) { |
181 | 0 | String s = "0000" + Integer.toString(ch, 16); |
182 | 0 | retval.append("\\u" + s.substring(s.length() - 4, s.length())); |
183 | 0 | } else { |
184 | 0 | retval.append(ch); |
185 | } | |
186 | continue; | |
187 | } | |
188 | } | |
189 | 0 | return retval.toString(); |
190 | } | |
191 | ||
192 | } |