/interpreter/tags/at2dist170907/src/edu/vub/util/regexp/REException.java
Java | 182 lines | 39 code | 23 blank | 120 comment | 0 complexity | e5636ad15b053d3234b99d58b95b332a MD5 | raw file
1/* gnu/regexp/REException.java 2 Copyright (C) 1998-2001, 2004 Free Software Foundation, Inc. 3 4This file is part of GNU Classpath. 5 6GNU Classpath is free software; you can redistribute it and/or modify 7it under the terms of the GNU General Public License as published by 8the Free Software Foundation; either version 2, or (at your option) 9any later version. 10 11GNU Classpath is distributed in the hope that it will be useful, but 12WITHOUT ANY WARRANTY; without even the implied warranty of 13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14General Public License for more details. 15 16You should have received a copy of the GNU General Public License 17along with GNU Classpath; see the file COPYING. If not, write to the 18Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 1902110-1301 USA. 20 21Linking this library statically or dynamically with other modules is 22making a combined work based on this library. Thus, the terms and 23conditions of the GNU General Public License cover the whole 24combination. 25 26As a special exception, the copyright holders of this library give you 27permission to link this library with independent modules to produce an 28executable, regardless of the license terms of these independent 29modules, and to copy and distribute the resulting executable under 30terms of your choice, provided that you also meet, for each linked 31independent module, the terms and conditions of the license of that 32module. An independent module is a module which is not derived from 33or based on this library. If you modify this library, you may extend 34this exception to your version of the library, but you are not 35obligated to do so. If you do not wish to do so, delete this 36exception statement from your version. */ 37 38package edu.vub.util.regexp; 39 40import java.text.MessageFormat; 41 42/** 43 * This is the regular expression exception class. An exception of this type 44 * defines the three attributes: 45 * <OL> 46 * <LI> A descriptive message of the error. 47 * <LI> An integral type code equivalent to one of the statically 48 * defined symbols listed below. 49 * <LI> The approximate position in the input string where the error 50 * occurred. 51 * </OL> 52 * 53 * @author <A HREF="mailto:wes@cacas.org">Wes Biggs</A> 54 */ 55 56public class REException extends Exception { 57 private int type; 58 private int pos; 59 60 // Error conditions from GNU regcomp(3) manual 61 62 /** 63 * Error flag. 64 * Invalid use of repetition operators such as using 65 * `*' as the first character. 66 */ 67 public static final int REG_BADRPT = 1; 68 69 /** 70 * Error flag. 71 * Invalid use of back reference operator. 72 */ 73 public static final int REG_BADBR = 2; 74 75 /** 76 * Error flag. 77 * Un-matched brace interval operators. 78 */ 79 public static final int REG_EBRACE = 3; 80 81 /** 82 * Error flag. 83 * Un-matched bracket list operators. 84 */ 85 public static final int REG_EBRACK = 4; 86 87 /** 88 * Error flag. 89 * Invalid use of the range operator, eg. the ending 90 * point of the range occurs prior to the starting 91 * point. 92 */ 93 public static final int REG_ERANGE = 5; 94 95 /** 96 * Error flag. 97 * Unknown character class name. <B>Not implemented</B>. 98 */ 99 public static final int REG_ECTYPE = 6; 100 101 /** 102 * Error flag. 103 * Un-matched parenthesis group operators. 104 */ 105 public static final int REG_EPAREN = 7; 106 107 /** 108 * Error flag. 109 * Invalid back reference to a subexpression. 110 */ 111 public static final int REG_ESUBREG = 8; 112 113 /** 114 * Error flag. 115 * Non specific error. <B>Not implemented</B>. 116 */ 117 public static final int REG_EEND = 9; 118 119 /** 120 * Error flag. 121 * Invalid escape sequence. <B>Not implemented</B>. 122 */ 123 public static final int REG_ESCAPE = 10; 124 125 /** 126 * Error flag. 127 * Invalid use of pattern operators such as group or list. 128 */ 129 public static final int REG_BADPAT = 11; 130 131 /** 132 * Error flag. 133 * Compiled regular expression requires a pattern 134 * buffer larger than 64Kb. <B>Not implemented</B>. 135 */ 136 public static final int REG_ESIZE = 12; 137 138 /** 139 * Error flag. 140 * The regex routines ran out of memory. <B>Not implemented</B>. 141 */ 142 public static final int REG_ESPACE = 13; 143 144 REException(String msg, int type, int position) { 145 super(msg); 146 this.type = type; 147 this.pos = position; 148 } 149 150 /** 151 * Returns the type of the exception, one of the constants listed above. 152 */ 153 154 public int getType() { 155 return type; 156 } 157 158 /** 159 * Returns the position, relative to the string or character array being 160 * compiled, where the error occurred. This position is generally the point 161 * where the error was detected, not necessarily the starting index of 162 * a bad subexpression. 163 */ 164 public int getPosition() { 165 return pos; 166 } 167 168 /** 169 * Reports the descriptive message associated with this exception 170 * as well as its index position in the string or character array 171 * being compiled. 172 */ 173 public String getMessage() { 174 Object[] args = {new Integer(pos)}; 175 StringBuffer sb = new StringBuffer(); 176 String prefix = "At position {0} in regular expression pattern:"; 177 sb.append(MessageFormat.format(prefix, args)); 178 sb.append('\n'); 179 sb.append(super.getMessage()); 180 return sb.toString(); 181 } 182}