001 /* Generated By:JavaCC: Do not edit this line. ParseException.java Version 0.7pre6 */
002
003 /*
004 * Cobertura - http://cobertura.sourceforge.net/
005 *
006 * This file was taken from JavaNCSS
007 * http://www.kclee.com/clemens/java/javancss/
008 * Copyright (C) 2000 Chr. Clemens Lee <clemens a.t kclee d.o.t com>
009 *
010 * Cobertura is free software; you can redistribute it and/or modify
011 * it under the terms of the GNU General Public License as published
012 * by the Free Software Foundation; either version 2 of the License,
013 * or (at your option) any later version.
014 *
015 * Cobertura is distributed in the hope that it will be useful, but
016 * WITHOUT ANY WARRANTY; without even the implied warranty of
017 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
018 * General Public License for more details.
019 *
020 * You should have received a copy of the GNU General Public License
021 * along with Cobertura; if not, write to the Free Software
022 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
023 * USA
024 */
025 package net.sourceforge.cobertura.javancss;
026
027 /**
028 * This exception is thrown when parse errors are encountered.
029 * You can explicitly create objects of this exception type by
030 * calling the method generateParseException in the generated
031 * parser.
032 *
033 * You can modify this class to customize your error reporting
034 * mechanisms so long as you retain the public fields.
035 */
036 public class ParseException extends Exception {
037
038 /**
039 * This constructor is used by the method "generateParseException"
040 * in the generated parser. Calling this constructor generates
041 * a new object of this type with the fields "currentToken",
042 * "expectedTokenSequences", and "tokenImage" set. The boolean
043 * flag "specialConstructor" is also set to true to indicate that
044 * this constructor was used to create this object.
045 * This constructor calls its super class with the empty string
046 * to force the "toString" method of parent class "Throwable" to
047 * print the error message in the form:
048 * ParseException: <result of getMessage>
049 */
050 public ParseException(Token currentTokenVal,
051 int[][] expectedTokenSequencesVal,
052 String[] tokenImageVal
053 )
054 {
055 super("");
056 specialConstructor = true;
057 currentToken = currentTokenVal;
058 expectedTokenSequences = expectedTokenSequencesVal;
059 tokenImage = tokenImageVal;
060 }
061
062 /**
063 * The following constructors are for use by you for whatever
064 * purpose you can think of. Constructing the exception in this
065 * manner makes the exception behave in the normal way - i.e., as
066 * documented in the class "Throwable". The fields "errorToken",
067 * "expectedTokenSequences", and "tokenImage" do not contain
068 * relevant information. The JavaCC generated code does not use
069 * these constructors.
070 */
071
072 public ParseException() {
073 super();
074 specialConstructor = false;
075 }
076
077 public ParseException(String message) {
078 super(message);
079 specialConstructor = false;
080 }
081
082 /**
083 * This variable determines which constructor was used to create
084 * this object and thereby affects the semantics of the
085 * "getMessage" method (see below).
086 */
087 protected boolean specialConstructor;
088
089 /**
090 * This is the last token that has been consumed successfully. If
091 * this object has been created due to a parse error, the token
092 * followng this token will (therefore) be the first error token.
093 */
094 public Token currentToken;
095
096 /**
097 * Each entry in this array is an array of integers. Each array
098 * of integers represents a sequence of tokens (by their ordinal
099 * values) that is expected at this point of the parse.
100 */
101 public int[][] expectedTokenSequences;
102
103 /**
104 * This is a reference to the "tokenImage" array of the generated
105 * parser within which the parse error occurred. This array is
106 * defined in the generated ...Constants interface.
107 */
108 public String[] tokenImage;
109
110 /**
111 * This method has the standard behavior when this object has been
112 * created using the standard constructors. Otherwise, it uses
113 * "currentToken" and "expectedTokenSequences" to generate a parse
114 * error message and returns it. If this object has been created
115 * due to a parse error, and you do not catch it (it gets thrown
116 * from the parser), then this method is called during the printing
117 * of the final stack trace, and hence the correct error message
118 * gets displayed.
119 */
120 public String getMessage() {
121 if (!specialConstructor) {
122 return super.getMessage();
123 }
124 String expected = "";
125 int maxSize = 0;
126 for (int i = 0; i < expectedTokenSequences.length; i++) {
127 if (maxSize < expectedTokenSequences[i].length) {
128 maxSize = expectedTokenSequences[i].length;
129 }
130 for (int j = 0; j < expectedTokenSequences[i].length; j++) {
131 expected += tokenImage[expectedTokenSequences[i][j]] + " ";
132 }
133 if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
134 expected += "...";
135 }
136 expected += eol + " ";
137 }
138 String retval = "Encountered \"";
139 Token tok = currentToken.next;
140 for (int i = 0; i < maxSize; i++) {
141 if (i != 0) retval += " ";
142 if (tok.kind == 0) {
143 retval += tokenImage[0];
144 break;
145 }
146 retval += add_escapes(tok.image);
147 tok = tok.next;
148 }
149 retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn + "." + eol;
150 if (expectedTokenSequences.length == 1) {
151 retval += "Was expecting:" + eol + " ";
152 } else {
153 retval += "Was expecting one of:" + eol + " ";
154 }
155 retval += expected;
156 return retval;
157 }
158
159 /**
160 * The end of line string for this machine.
161 */
162 protected String eol = System.getProperty("line.separator", "\n");
163
164 /**
165 * Used to convert raw characters to their escaped version
166 * when these raw version cannot be used as part of an ASCII
167 * string literal.
168 */
169 protected String add_escapes(String str) {
170 StringBuffer retval = new StringBuffer();
171 char ch;
172 for (int i = 0; i < str.length(); i++) {
173 switch (str.charAt(i))
174 {
175 case 0 :
176 continue;
177 case '\b':
178 retval.append("\\b");
179 continue;
180 case '\t':
181 retval.append("\\t");
182 continue;
183 case '\n':
184 retval.append("\\n");
185 continue;
186 case '\f':
187 retval.append("\\f");
188 continue;
189 case '\r':
190 retval.append("\\r");
191 continue;
192 case '\"':
193 retval.append("\\\"");
194 continue;
195 case '\'':
196 retval.append("\\\'");
197 continue;
198 case '\\':
199 retval.append("\\\\");
200 continue;
201 default:
202 if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
203 String s = "0000" + Integer.toString(ch, 16);
204 retval.append("\\u" + s.substring(s.length() - 4, s.length()));
205 } else {
206 retval.append(ch);
207 }
208 continue;
209 }
210 }
211 return retval.toString();
212 }
213
214 }