1 /*
2 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 /* Generated By:JavaCC: Do not edit this line. ParseException.java Version 3.0 */
26 package com.sun.xml.internal.rngom.parse.compact;
27
28 /**
29 * This exception is thrown when parse errors are encountered.
30 * You can explicitly create objects of this exception type by
31 * calling the method generateParseException in the generated
32 * parser.
33 *
34 * You can modify this class to customize your error reporting
35 * mechanisms so long as you retain the public fields.
36 */
37 public class ParseException extends Exception {
38
39 /**
40 * This constructor is used by the method "generateParseException"
41 * in the generated parser. Calling this constructor generates
42 * a new object of this type with the fields "currentToken",
43 * "expectedTokenSequences", and "tokenImage" set. The boolean
44 * flag "specialConstructor" is also set to true to indicate that
45 * this constructor was used to create this object.
46 * This constructor calls its super class with the empty string
47 * to force the "toString" method of parent class "Throwable" to
48 * print the error message in the form:
49 * ParseException: <result of getMessage>
50 */
51 public ParseException(Token currentTokenVal,
52 int[][] expectedTokenSequencesVal,
53 String[] tokenImageVal
54 )
55 {
56 super("");
57 specialConstructor = true;
58 currentToken = currentTokenVal;
59 expectedTokenSequences = expectedTokenSequencesVal;
60 tokenImage = tokenImageVal;
61 }
62
63 /**
64 * The following constructors are for use by you for whatever
65 * purpose you can think of. Constructing the exception in this
66 * manner makes the exception behave in the normal way - i.e., as
67 * documented in the class "Throwable". The fields "errorToken",
68 * "expectedTokenSequences", and "tokenImage" do not contain
69 * relevant information. The JavaCC generated code does not use
70 * these constructors.
71 */
72
73 public ParseException() {
74 super();
75 specialConstructor = false;
76 }
77
78 public ParseException(String message) {
79 super(message);
80 specialConstructor = false;
81 }
82
83 /**
84 * This variable determines which constructor was used to create
85 * this object and thereby affects the semantics of the
86 * "getMessage" method (see below).
87 */
88 protected boolean specialConstructor;
89
90 /**
91 * This is the last token that has been consumed successfully. If
92 * this object has been created due to a parse error, the token
93 * followng this token will (therefore) be the first error token.
94 */
95 public Token currentToken;
96
97 /**
98 * Each entry in this array is an array of integers. Each array
99 * of integers represents a sequence of tokens (by their ordinal
100 * values) that is expected at this point of the parse.
101 */
102 public int[][] expectedTokenSequences;
103
104 /**
105 * This is a reference to the "tokenImage" array of the generated
106 * parser within which the parse error occurred. This array is
107 * defined in the generated ...Constants interface.
108 */
109 public String[] tokenImage;
110
111 /**
112 * This method has the standard behavior when this object has been
113 * created using the standard constructors. Otherwise, it uses
114 * "currentToken" and "expectedTokenSequences" to generate a parse
115 * error message and returns it. If this object has been created
116 * due to a parse error, and you do not catch it (it gets thrown
117 * from the parser), then this method is called during the printing
118 * of the final stack trace, and hence the correct error message
119 * gets displayed.
120 */
121 public String getMessage() {
122 if (!specialConstructor) {
123 return super.getMessage();
124 }
125 String expected = "";
126 int maxSize = 0;
127 for (int i = 0; i < expectedTokenSequences.length; i++) {
128 if (maxSize < expectedTokenSequences[i].length) {
129 maxSize = expectedTokenSequences[i].length;
130 }
131 for (int j = 0; j < expectedTokenSequences[i].length; j++) {
132 expected += tokenImage[expectedTokenSequences[i][j]] + " ";
133 }
134 if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
135 expected += "...";
136 }
137 expected += eol + " ";
138 }
139 String retval = "Encountered \"";
140 Token tok = currentToken.next;
141 for (int i = 0; i < maxSize; i++) {
142 if (i != 0) retval += " ";
143 if (tok.kind == 0) {
144 retval += tokenImage[0];
145 break;
146 }
147 retval += add_escapes(tok.image);
148 tok = tok.next;
149 }
150 retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn;
151 retval += "." + eol;
152 if (expectedTokenSequences.length == 1) {
153 retval += "Was expecting:" + eol + " ";
154 } else {
155 retval += "Was expecting one of:" + eol + " ";
156 }
157 retval += expected;
158 return retval;
159 }
160
161 /**
162 * The end of line string for this machine.
163 */
164 protected String eol = System.getProperty("line.separator", "\n");
165
166 /**
167 * Used to convert raw characters to their escaped version
168 * when these raw version cannot be used as part of an ASCII
169 * string literal.
170 */
171 protected String add_escapes(String str) {
172 StringBuffer retval = new StringBuffer();
173 char ch;
174 for (int i = 0; i < str.length(); i++) {
175 switch (str.charAt(i))
176 {
177 case 0 :
178 continue;
179 case '\b':
180 retval.append("\\b");
181 continue;
182 case '\t':
183 retval.append("\\t");
184 continue;
185 case '\n':
186 retval.append("\\n");
187 continue;
188 case '\f':
189 retval.append("\\f");
190 continue;
191 case '\r':
192 retval.append("\\r");
193 continue;
194 case '\"':
195 retval.append("\\\"");
196 continue;
197 case '\'':
198 retval.append("\\\'");
199 continue;
200 case '\\':
201 retval.append("\\\\");
202 continue;
203 default:
204 if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
205 String s = "0000" + Integer.toString(ch, 16);
206 retval.append("\\u" + s.substring(s.length() - 4, s.length()));
207 } else {
208 retval.append(ch);
209 }
210 continue;
211 }
212 }
213 return retval.toString();
214 }
215
216 }