| /* |
| * Copyright (c) 1999, 2001, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * This source code is provided to illustrate the usage of a given feature |
| * or technique and has been deliberately simplified. Additional steps |
| * required for a production-quality application, such as security checks, |
| * input validation and proper error handling, might not be present in |
| * this sample code. |
| */ |
| |
| |
| /* Generated By:JavaCC: Do not edit this line. ParseException.java Version 0.7pre6 */ |
| package com.sun.tools.example.debug.expr; |
| |
| /** |
| * This exception is thrown when parse errors are encountered. |
| * You can explicitly create objects of this exception type by |
| * calling the method generateParseException in the generated |
| * parser. |
| * |
| * You can modify this class to customize your error reporting |
| * mechanisms so long as you retain the public fields. |
| */ |
| public class ParseException extends Exception { |
| |
| private static final long serialVersionUID = 7978489144303647901L; |
| |
| /** |
| * This constructor is used by the method "generateParseException" |
| * in the generated parser. Calling this constructor generates |
| * a new object of this type with the fields "currentToken", |
| * "expectedTokenSequences", and "tokenImage" set. The boolean |
| * flag "specialConstructor" is also set to true to indicate that |
| * this constructor was used to create this object. |
| * This constructor calls its super class with the empty string |
| * to force the "toString" method of parent class "Throwable" to |
| * print the error message in the form: |
| * ParseException: <result of getMessage> |
| */ |
| public ParseException(Token currentTokenVal, |
| int[][] expectedTokenSequencesVal, |
| String[] tokenImageVal |
| ) |
| { |
| super(""); |
| specialConstructor = true; |
| currentToken = currentTokenVal; |
| expectedTokenSequences = expectedTokenSequencesVal; |
| tokenImage = tokenImageVal; |
| } |
| |
| /** |
| * The following constructors are for use by you for whatever |
| * purpose you can think of. Constructing the exception in this |
| * manner makes the exception behave in the normal way - i.e., as |
| * documented in the class "Throwable". The fields "errorToken", |
| * "expectedTokenSequences", and "tokenImage" do not contain |
| * relevant information. The JavaCC generated code does not use |
| * these constructors. |
| */ |
| |
| public ParseException() { |
| super(); |
| specialConstructor = false; |
| } |
| |
| public ParseException(String message) { |
| super(message); |
| specialConstructor = false; |
| } |
| |
| /** |
| * This variable determines which constructor was used to create |
| * this object and thereby affects the semantics of the |
| * "getMessage" method (see below). |
| */ |
| protected boolean specialConstructor; |
| |
| /** |
| * This is the last token that has been consumed successfully. If |
| * this object has been created due to a parse error, the token |
| * followng this token will (therefore) be the first error token. |
| */ |
| public Token currentToken; |
| |
| /** |
| * Each entry in this array is an array of integers. Each array |
| * of integers represents a sequence of tokens (by their ordinal |
| * values) that is expected at this point of the parse. |
| */ |
| public int[][] expectedTokenSequences; |
| |
| /** |
| * This is a reference to the "tokenImage" array of the generated |
| * parser within which the parse error occurred. This array is |
| * defined in the generated ...Constants interface. |
| */ |
| public String[] tokenImage; |
| |
| /** |
| * This method has the standard behavior when this object has been |
| * created using the standard constructors. Otherwise, it uses |
| * "currentToken" and "expectedTokenSequences" to generate a parse |
| * error message and returns it. If this object has been created |
| * due to a parse error, and you do not catch it (it gets thrown |
| * from the parser), then this method is called during the printing |
| * of the final stack trace, and hence the correct error message |
| * gets displayed. |
| */ |
| @Override |
| public String getMessage() { |
| if (!specialConstructor) { |
| return super.getMessage(); |
| } |
| String expected = ""; |
| int maxSize = 0; |
| for (int[] expectedTokenSequence : expectedTokenSequences) { |
| if (maxSize < expectedTokenSequence.length) { |
| maxSize = expectedTokenSequence.length; |
| } |
| for (int j = 0; j < expectedTokenSequence.length; j++) { |
| expected += tokenImage[expectedTokenSequence[j]] + " "; |
| } |
| if (expectedTokenSequence[expectedTokenSequence.length - 1] != 0) { |
| expected += "..."; |
| } |
| expected += eol + " "; |
| } |
| String retval = "Encountered \""; |
| Token tok = currentToken.next; |
| for (int i = 0; i < maxSize; i++) { |
| if (i != 0) { |
| retval += " "; |
| } |
| if (tok.kind == 0) { |
| retval += tokenImage[0]; |
| break; |
| } |
| retval += add_escapes(tok.image); |
| tok = tok.next; |
| } |
| retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn + "." + eol; |
| if (expectedTokenSequences.length == 1) { |
| retval += "Was expecting:" + eol + " "; |
| } else { |
| retval += "Was expecting one of:" + eol + " "; |
| } |
| retval += expected; |
| return retval; |
| } |
| |
| /** |
| * The end of line string for this machine. |
| */ |
| protected String eol = System.getProperty("line.separator", "\n"); |
| |
| /** |
| * Used to convert raw characters to their escaped version |
| * when these raw version cannot be used as part of an ASCII |
| * string literal. |
| */ |
| protected String add_escapes(String str) { |
| StringBuffer retval = new StringBuffer(); |
| char ch; |
| for (int i = 0; i < str.length(); i++) { |
| switch (str.charAt(i)) |
| { |
| case 0 : |
| continue; |
| case '\b': |
| retval.append("\\b"); |
| continue; |
| case '\t': |
| retval.append("\\t"); |
| continue; |
| case '\n': |
| retval.append("\\n"); |
| continue; |
| case '\f': |
| retval.append("\\f"); |
| continue; |
| case '\r': |
| retval.append("\\r"); |
| continue; |
| case '\"': |
| retval.append("\\\""); |
| continue; |
| case '\'': |
| retval.append("\\\'"); |
| continue; |
| case '\\': |
| retval.append("\\\\"); |
| continue; |
| default: |
| if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) { |
| String s = "0000" + Integer.toString(ch, 16); |
| retval.append("\\u" + s.substring(s.length() - 4, s.length())); |
| } else { |
| retval.append(ch); |
| } |
| continue; |
| } |
| } |
| return retval.toString(); |
| } |
| |
| } |
