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| 1 | +/* | |
| 2 | + * Copyright (c) 1999, 2001, 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 | + | |
| 26 | +/* Generated By:JavaCC: Do not edit this line. ParseException.java Version 0.7pre6 */ | |
| 27 | +package com.sun.tools.example.debug.expr; | |
| 28 | + | |
| 29 | +/** | |
| 30 | + * This exception is thrown when parse errors are encountered. | |
| 31 | + * You can explicitly create objects of this exception type by | |
| 32 | + * calling the method generateParseException in the generated | |
| 33 | + * parser. | |
| 34 | + * | |
| 35 | + * You can modify this class to customize your error reporting | |
| 36 | + * mechanisms so long as you retain the public fields. | |
| 37 | + */ | |
| 38 | +public class ParseException extends Exception { | |
| 39 | + | |
| 40 | + private static final long serialVersionUID = 7978489144303647901L; | |
| 41 | + | |
| 42 | + /** | |
| 43 | + * This constructor is used by the method "generateParseException" | |
| 44 | + * in the generated parser. Calling this constructor generates | |
| 45 | + * a new object of this type with the fields "currentToken", | |
| 46 | + * "expectedTokenSequences", and "tokenImage" set. The boolean | |
| 47 | + * flag "specialConstructor" is also set to true to indicate that | |
| 48 | + * this constructor was used to create this object. | |
| 49 | + * This constructor calls its super class with the empty string | |
| 50 | + * to force the "toString" method of parent class "Throwable" to | |
| 51 | + * print the error message in the form: | |
| 52 | + * ParseException: <result of getMessage> | |
| 53 | + */ | |
| 54 | + public ParseException(Token currentTokenVal, | |
| 55 | + int[][] expectedTokenSequencesVal, | |
| 56 | + String[] tokenImageVal | |
| 57 | + ) | |
| 58 | + { | |
| 59 | + super(""); | |
| 60 | + specialConstructor = true; | |
| 61 | + currentToken = currentTokenVal; | |
| 62 | + expectedTokenSequences = expectedTokenSequencesVal; | |
| 63 | + tokenImage = tokenImageVal; | |
| 64 | + } | |
| 65 | + | |
| 66 | + /** | |
| 67 | + * The following constructors are for use by you for whatever | |
| 68 | + * purpose you can think of. Constructing the exception in this | |
| 69 | + * manner makes the exception behave in the normal way - i.e., as | |
| 70 | + * documented in the class "Throwable". The fields "errorToken", | |
| 71 | + * "expectedTokenSequences", and "tokenImage" do not contain | |
| 72 | + * relevant information. The JavaCC generated code does not use | |
| 73 | + * these constructors. | |
| 74 | + */ | |
| 75 | + | |
| 76 | + public ParseException() { | |
| 77 | + super(); | |
| 78 | + specialConstructor = false; | |
| 79 | + } | |
| 80 | + | |
| 81 | + public ParseException(String message) { | |
| 82 | + super(message); | |
| 83 | + specialConstructor = false; | |
| 84 | + } | |
| 85 | + | |
| 86 | + /** | |
| 87 | + * This variable determines which constructor was used to create | |
| 88 | + * this object and thereby affects the semantics of the | |
| 89 | + * "getMessage" method (see below). | |
| 90 | + */ | |
| 91 | + protected boolean specialConstructor; | |
| 92 | + | |
| 93 | + /** | |
| 94 | + * This is the last token that has been consumed successfully. If | |
| 95 | + * this object has been created due to a parse error, the token | |
| 96 | + * followng this token will (therefore) be the first error token. | |
| 97 | + */ | |
| 98 | + public Token currentToken; | |
| 99 | + | |
| 100 | + /** | |
| 101 | + * Each entry in this array is an array of integers. Each array | |
| 102 | + * of integers represents a sequence of tokens (by their ordinal | |
| 103 | + * values) that is expected at this point of the parse. | |
| 104 | + */ | |
| 105 | + public int[][] expectedTokenSequences; | |
| 106 | + | |
| 107 | + /** | |
| 108 | + * This is a reference to the "tokenImage" array of the generated | |
| 109 | + * parser within which the parse error occurred. This array is | |
| 110 | + * defined in the generated ...Constants interface. | |
| 111 | + */ | |
| 112 | + public String[] tokenImage; | |
| 113 | + | |
| 114 | + /** | |
| 115 | + * This method has the standard behavior when this object has been | |
| 116 | + * created using the standard constructors. Otherwise, it uses | |
| 117 | + * "currentToken" and "expectedTokenSequences" to generate a parse | |
| 118 | + * error message and returns it. If this object has been created | |
| 119 | + * due to a parse error, and you do not catch it (it gets thrown | |
| 120 | + * from the parser), then this method is called during the printing | |
| 121 | + * of the final stack trace, and hence the correct error message | |
| 122 | + * gets displayed. | |
| 123 | + */ | |
| 124 | + @Override | |
| 125 | + public String getMessage() { | |
| 126 | + if (!specialConstructor) { | |
| 127 | + return super.getMessage(); | |
| 128 | + } | |
| 129 | + String expected = ""; | |
| 130 | + int maxSize = 0; | |
| 131 | + for (int[] expectedTokenSequence : expectedTokenSequences) { | |
| 132 | + if (maxSize < expectedTokenSequence.length) { | |
| 133 | + maxSize = expectedTokenSequence.length; | |
| 134 | + } | |
| 135 | + for (int j = 0; j < expectedTokenSequence.length; j++) { | |
| 136 | + expected += tokenImage[expectedTokenSequence[j]] + " "; | |
| 137 | + } | |
| 138 | + if (expectedTokenSequence[expectedTokenSequence.length - 1] != 0) { | |
| 139 | + expected += "..."; | |
| 140 | + } | |
| 141 | + expected += eol + " "; | |
| 142 | + } | |
| 143 | + String retval = "Encountered \""; | |
| 144 | + Token tok = currentToken.next; | |
| 145 | + for (int i = 0; i < maxSize; i++) { | |
| 146 | + if (i != 0) { | |
| 147 | + retval += " "; | |
| 148 | + } | |
| 149 | + if (tok.kind == 0) { | |
| 150 | + retval += tokenImage[0]; | |
| 151 | + break; | |
| 152 | + } | |
| 153 | + retval += add_escapes(tok.image); | |
| 154 | + tok = tok.next; | |
| 155 | + } | |
| 156 | + retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn + "." + eol; | |
| 157 | + if (expectedTokenSequences.length == 1) { | |
| 158 | + retval += "Was expecting:" + eol + " "; | |
| 159 | + } else { | |
| 160 | + retval += "Was expecting one of:" + eol + " "; | |
| 161 | + } | |
| 162 | + retval += expected; | |
| 163 | + return retval; | |
| 164 | + } | |
| 165 | + | |
| 166 | + /** | |
| 167 | + * The end of line string for this machine. | |
| 168 | + */ | |
| 169 | + protected String eol = System.getProperty("line.separator", "\n"); | |
| 170 | + | |
| 171 | + /** | |
| 172 | + * Used to convert raw characters to their escaped version | |
| 173 | + * when these raw version cannot be used as part of an ASCII | |
| 174 | + * string literal. | |
| 175 | + */ | |
| 176 | + protected String add_escapes(String str) { | |
| 177 | + StringBuffer retval = new StringBuffer(); | |
| 178 | + char ch; | |
| 179 | + for (int i = 0; i < str.length(); i++) { | |
| 180 | + switch (str.charAt(i)) | |
| 181 | + { | |
| 182 | + case 0 : | |
| 183 | + continue; | |
| 184 | + case '\b': | |
| 185 | + retval.append("\\b"); | |
| 186 | + continue; | |
| 187 | + case '\t': | |
| 188 | + retval.append("\\t"); | |
| 189 | + continue; | |
| 190 | + case '\n': | |
| 191 | + retval.append("\\n"); | |
| 192 | + continue; | |
| 193 | + case '\f': | |
| 194 | + retval.append("\\f"); | |
| 195 | + continue; | |
| 196 | + case '\r': | |
| 197 | + retval.append("\\r"); | |
| 198 | + continue; | |
| 199 | + case '\"': | |
| 200 | + retval.append("\\\""); | |
| 201 | + continue; | |
| 202 | + case '\'': | |
| 203 | + retval.append("\\\'"); | |
| 204 | + continue; | |
| 205 | + case '\\': | |
| 206 | + retval.append("\\\\"); | |
| 207 | + continue; | |
| 208 | + default: | |
| 209 | + if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) { | |
| 210 | + String s = "0000" + Integer.toString(ch, 16); | |
| 211 | + retval.append("\\u" + s.substring(s.length() - 4, s.length())); | |
| 212 | + } else { | |
| 213 | + retval.append(ch); | |
| 214 | + } | |
| 215 | + continue; | |
| 216 | + } | |
| 217 | + } | |
| 218 | + return retval.toString(); | |
| 219 | + } | |
| 220 | + | |
| 221 | +} | |