2 * Copyright (C) 2001, 2002 The Mir-coders group
4 * This file is part of Mir.
6 * Mir is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Mir is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Mir; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * In addition, as a special exception, The Mir-coders gives permission to link
21 * the code of this program with the com.oreilly.servlet library, any library
22 * licensed under the Apache Software License, The Sun (tm) Java Advanced
23 * Imaging library (JAI), The Sun JIMI library (or with modified versions of
24 * the above that use the same license as the above), and distribute linked
25 * combinations including the two. You must obey the GNU General Public
26 * License in all respects for all of the code used other than the above
27 * mentioned libraries. If you modify this file, you may extend this exception
28 * to your version of the file, but you are not obligated to do so. If you do
29 * not wish to do so, delete this exception statement from your version.
35 import gnu.regexp.REException;
36 import gnu.regexp.REMatch;
38 import multex.Failure;
40 public class SimpleParser {
44 public SimpleParser(String aData) {
49 public boolean parses(RE aRegularExpression) throws SimpleParserExc {
50 REMatch match = aRegularExpression.getMatch(data, position);
52 return (match!=null && match.getStartIndex()==position) ;
55 public String parse(RE aRegularExpression, String aMessage) throws SimpleParserExc {
56 REMatch match = aRegularExpression.getMatch(data, position);
58 if (match==null || match.getStartIndex()!=position)
59 throw new SimpleParserExc(aMessage+" at position "+position+" in '"+data+"'");
61 position=match.getEndIndex();
63 return match.toString();
66 public String parse(RE aRegularExpression) throws SimpleParserExc {
67 return parse( aRegularExpression, "No match found for '"+aRegularExpression.toString()+"'");
70 public void skip(RE aRegularExpression) throws SimpleParserExc {
71 REMatch match = aRegularExpression.getMatch(data, position);
73 if (match!=null && match.getStartIndex()==position)
74 position=match.getEndIndex();
77 public boolean parses(String anExpression) throws SimpleParserExc {
79 return parses(new RE(anExpression));
81 catch (SimpleParserExc e) {
84 catch (REException e) {
85 throw new SimpleParserFailure( "Error compiling regular expression '" + anExpression + "': " + e.getMessage(), e);
88 throw new SimpleParserFailure( t );
92 public String parse(String anExpression) throws SimpleParserExc, SimpleParserFailure {
94 return parse(new RE(anExpression));
96 catch (SimpleParserExc e) {
99 catch (REException e) {
100 throw new SimpleParserFailure( "Error compiling regular expression '" + anExpression + "': " + e.getMessage(), e);
102 catch (Throwable t) {
103 throw new SimpleParserFailure( t );
107 public String parse(String anExpression, String aMessage) throws SimpleParserExc, SimpleParserFailure {
109 return parse(new RE(anExpression), aMessage);
111 catch (SimpleParserExc e) {
114 catch (REException e) {
115 throw new SimpleParserFailure( "Error compiling regular expression '" + anExpression + "': " + e.getMessage(), e);
117 catch (Throwable t) {
118 throw new SimpleParserFailure( t );
122 public void skip(String anExpression) throws SimpleParserExc, SimpleParserFailure {
124 skip(new RE(anExpression));
126 catch (SimpleParserExc e) {
129 catch (REException e) {
130 throw new SimpleParserFailure( "Error compiling regular expression '" + anExpression + "': " + e.getMessage(), e);
132 catch (Throwable t) {
133 throw new SimpleParserFailure( t );
136 public boolean isAtEnd() {
137 return position>=data.length();
140 public static class SimpleParserFailure extends Failure {
141 public SimpleParserFailure(Throwable aThrowable) {
142 super(aThrowable.getMessage(), aThrowable);
145 public SimpleParserFailure(String aMessage, Throwable aThrowable) {
146 super(aMessage, aThrowable);
150 public static class SimpleParserExc extends Exc {
151 public SimpleParserExc(String aMessage) {