133 lines
4.0 KiB
Java
133 lines
4.0 KiB
Java
/* PatternSyntaxException - Indicates illegal pattern for regular expression.
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Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.util.regex;
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/**
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* Indicates illegal pattern for regular expression.
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* Includes state to inspect the pattern and what and where the expression
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* was not valid regular expression.
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*/
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public class PatternSyntaxException extends IllegalArgumentException
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{
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private static final long serialVersionUID = -3864639126226059218L;
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/**
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* Human readable escription of the syntax error.
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*/
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private final String desc;
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/**
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* The original pattern that contained the syntax error.
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*/
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private final String pattern;
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/**
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* Index of the first character in the String that was probably invalid,
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* or -1 when unknown.
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*/
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private final int index;
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/**
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* Creates a new PatternSyntaxException.
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*
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* @param description Human readable escription of the syntax error.
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* @param pattern The original pattern that contained the syntax error.
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* @param index Index of the first character in the String that was
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* probably invalid, or -1 when unknown.
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*/
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public PatternSyntaxException(String description,
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String pattern,
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int index)
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{
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super(description);
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this.desc = description;
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this.pattern = pattern;
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this.index = index;
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}
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/**
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* Returns a human readable escription of the syntax error.
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*/
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public String getDescription()
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{
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return desc;
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}
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/**
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* Returns the original pattern that contained the syntax error.
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*/
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public String getPattern()
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{
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return pattern;
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}
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/**
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* Returns the index of the first character in the String that was probably
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* invalid, or -1 when unknown.
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*/
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public int getIndex()
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{
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return index;
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}
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/**
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* Returns a string containing a line with the description, a line with
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* the original pattern and a line indicating with a ^ which character is
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* probably the first invalid character in the pattern if the index is not
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* negative.
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*/
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public String getMessage()
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{
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String lineSep = System.getProperty("line.separator");
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StringBuffer sb = new StringBuffer(desc);
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sb.append(lineSep);
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sb.append('\t');
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sb.append(pattern);
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if (index != -1)
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{
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sb.append(lineSep);
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sb.append('\t');
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for (int i=0; i<index; i++)
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sb.append(' ');
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sb.append('^');
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}
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return sb.toString();
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}
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}
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