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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 | } | ||