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1: /** 2: * ========================================= 3: * LibLayout : a free Java layouting library 4: * ========================================= 5: * 6: * Project Info: http://www.jfree.org/liblayout/ 7: * Project Lead: Thomas Morgner; 8: * 9: * (C) Copyright 2006, by Pentaho Corperation and Contributors. 10: * 11: * This library is free software; you can redistribute it and/or modify it under the terms 12: * of the GNU Lesser General Public License as published by the Free Software Foundation; 13: * either version 2.1 of the License, or (at your option) any later version. 14: * 15: * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 16: * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 17: * See the GNU Lesser General Public License for more details. 18: * 19: * You should have received a copy of the GNU Lesser General Public License along with this 20: * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, 21: * Boston, MA 02111-1307, USA. 22: * 23: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 24: * in the United States and other countries.] 25: * 26: * ------------ 27: * ParseException.java 28: * ------------ 29: * (C) Copyright 2006, by Pentaho Corperation. 30: * 31: * Original Author: Thomas Morgner; 32: * Contributor(s): -; 33: * 34: * $Id: ParseException.java,v 1.1.1.1 2006/04/23 14:51:51 taqua Exp $ 35: * 36: * Changes 37: * ------- 38: * 39: * 40: */ 41: 42: /* Generated By:JavaCC: Do not edit this line. ParseException.java Version 3.0 */ 43: package org.w3c.flute.parser; 44: 45: import org.w3c.css.sac.CSSException; 46: 47: /** 48: * This exception is thrown when parse errors are encountered. 49: * You can explicitly create objects of this exception type by 50: * calling the method generateParseException in the generated 51: * parser. 52: * 53: * You can modify this class to customize your error reporting 54: * mechanisms so long as you retain the public fields. 55: */ 56: public class ParseException extends CSSException { 57: 58: /** 59: * This constructor is used by the method "generateParseException" 60: * in the generated parser. Calling this constructor generates 61: * a new object of this type with the fields "currentToken", 62: * "expectedTokenSequences", and "tokenImage" set. The boolean 63: * flag "specialConstructor" is also set to true to indicate that 64: * this constructor was used to create this object. 65: * This constructor calls its super class with the empty string 66: * to force the "toString" method of parent class "Throwable" to 67: * print the error message in the form: 68: * ParseException: <result of getMessage> 69: */ 70: public ParseException(Token currentTokenVal, 71: int[][] expectedTokenSequencesVal, 72: String[] tokenImageVal 73: ) 74: { 75: super(""); 76: specialConstructor = true; 77: currentToken = currentTokenVal; 78: expectedTokenSequences = expectedTokenSequencesVal; 79: tokenImage = tokenImageVal; 80: } 81: 82: /** 83: * The following constructors are for use by you for whatever 84: * purpose you can think of. Constructing the exception in this 85: * manner makes the exception behave in the normal way - i.e., as 86: * documented in the class "Throwable". The fields "errorToken", 87: * "expectedTokenSequences", and "tokenImage" do not contain 88: * relevant information. The JavaCC generated code does not use 89: * these constructors. 90: */ 91: 92: public ParseException() { 93: super(); 94: specialConstructor = false; 95: } 96: 97: public ParseException(String message) { 98: super(message); 99: specialConstructor = false; 100: } 101: 102: /** 103: * This variable determines which constructor was used to create 104: * this object and thereby affects the semantics of the 105: * "getMessage" method (see below). 106: */ 107: protected boolean specialConstructor; 108: 109: /** 110: * This is the last token that has been consumed successfully. If 111: * this object has been created due to a parse error, the token 112: * followng this token will (therefore) be the first error token. 113: */ 114: public Token currentToken; 115: 116: /** 117: * Each entry in this array is an array of integers. Each array 118: * of integers represents a sequence of tokens (by their ordinal 119: * values) that is expected at this point of the parse. 120: */ 121: public int[][] expectedTokenSequences; 122: 123: /** 124: * This is a reference to the "tokenImage" array of the generated 125: * parser within which the parse error occurred. This array is 126: * defined in the generated ...Constants interface. 127: */ 128: public String[] tokenImage; 129: 130: /** 131: * This method has the standard behavior when this object has been 132: * created using the standard constructors. Otherwise, it uses 133: * "currentToken" and "expectedTokenSequences" to generate a parse 134: * error message and returns it. If this object has been created 135: * due to a parse error, and you do not catch it (it gets thrown 136: * from the parser), then this method is called during the printing 137: * of the final stack trace, and hence the correct error message 138: * gets displayed. 139: */ 140: public String getMessage() { 141: if (!specialConstructor) { 142: return super.getMessage(); 143: } 144: String expected = ""; 145: int maxSize = 0; 146: for (int i = 0; i < expectedTokenSequences.length; i++) { 147: if (maxSize < expectedTokenSequences[i].length) { 148: maxSize = expectedTokenSequences[i].length; 149: } 150: for (int j = 0; j < expectedTokenSequences[i].length; j++) { 151: expected += tokenImage[expectedTokenSequences[i][j]] + " "; 152: } 153: if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) { 154: expected += "..."; 155: } 156: expected += eol + " "; 157: } 158: String retval = "Encountered \""; 159: Token tok = currentToken.next; 160: for (int i = 0; i < maxSize; i++) { 161: if (i != 0) retval += " "; 162: if (tok.kind == 0) { 163: retval += tokenImage[0]; 164: break; 165: } 166: retval += add_escapes(tok.image); 167: tok = tok.next; 168: } 169: retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn; 170: retval += "." + eol; 171: if (expectedTokenSequences.length == 1) { 172: retval += "Was expecting:" + eol + " "; 173: } else { 174: retval += "Was expecting one of:" + eol + " "; 175: } 176: retval += expected; 177: return retval; 178: } 179: 180: /** 181: * The end of line string for this machine. 182: */ 183: protected String eol = System.getProperty("line.separator", "\n"); 184: 185: /** 186: * Used to convert raw characters to their escaped version 187: * when these raw version cannot be used as part of an ASCII 188: * string literal. 189: */ 190: protected String add_escapes(String str) { 191: StringBuffer retval = new StringBuffer(); 192: char ch; 193: for (int i = 0; i < str.length(); i++) { 194: switch (str.charAt(i)) 195: { 196: case 0 : 197: continue; 198: case '\b': 199: retval.append("\\b"); 200: continue; 201: case '\t': 202: retval.append("\\t"); 203: continue; 204: case '\n': 205: retval.append("\\n"); 206: continue; 207: case '\f': 208: retval.append("\\f"); 209: continue; 210: case '\r': 211: retval.append("\\r"); 212: continue; 213: case '\"': 214: retval.append("\\\""); 215: continue; 216: case '\'': 217: retval.append("\\\'"); 218: continue; 219: case '\\': 220: retval.append("\\\\"); 221: continue; 222: default: 223: if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) { 224: String s = "0000" + Integer.toString(ch, 16); 225: retval.append("\\u" + s.substring(s.length() - 4, s.length())); 226: } else { 227: retval.append(ch); 228: } 229: continue; 230: } 231: } 232: return retval.toString(); 233: } 234: 235: }