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.
37 import multex.Failure;
39 public class SimpleParser {
43 public SimpleParser(String aData) {
48 public boolean parses(RE aRegularExpression) throws SimpleParserExc {
49 REMatch match = aRegularExpression.getMatch(data, position);
51 return (match!=null && match.getStartIndex()==position) ;
54 public String parse(RE aRegularExpression, String aMessage) throws SimpleParserExc {
55 REMatch match = aRegularExpression.getMatch(data, position);
57 if (match==null || match.getStartIndex()!=position)
58 throw new SimpleParserExc(aMessage+" at position "+position+" in '"+data+"'");
60 position=match.getEndIndex();
62 return match.toString();
65 public String parse(RE aRegularExpression) throws SimpleParserExc {
66 return parse( aRegularExpression, "No match found for '"+aRegularExpression.toString()+"'");
69 public void skip(RE aRegularExpression) throws SimpleParserExc {
70 REMatch match = aRegularExpression.getMatch(data, position);
72 if (match!=null && match.getStartIndex()==position)
73 position=match.getEndIndex();
76 public boolean parses(String anExpression) throws SimpleParserExc {
78 return parses(new RE(anExpression));
80 catch (SimpleParserExc e) {
83 catch (REException e) {
84 throw new SimpleParserFailure( "Error compiling regular expression '" + anExpression + "': " + e.getMessage(), e);
87 throw new SimpleParserFailure( t );
91 public String parse(String anExpression) throws SimpleParserExc, SimpleParserFailure {
93 return parse(new RE(anExpression));
95 catch (SimpleParserExc e) {
98 catch (REException e) {
99 throw new SimpleParserFailure( "Error compiling regular expression '" + anExpression + "': " + e.getMessage(), e);
101 catch (Throwable t) {
102 throw new SimpleParserFailure( t );
106 public String parse(String anExpression, String aMessage) throws SimpleParserExc, SimpleParserFailure {
108 return parse(new RE(anExpression), aMessage);
110 catch (SimpleParserExc e) {
113 catch (REException e) {
114 throw new SimpleParserFailure( "Error compiling regular expression '" + anExpression + "': " + e.getMessage(), e);
116 catch (Throwable t) {
117 throw new SimpleParserFailure( t );
121 public void skip(String anExpression) throws SimpleParserExc, SimpleParserFailure {
123 skip(new RE(anExpression));
125 catch (SimpleParserExc e) {
128 catch (REException e) {
129 throw new SimpleParserFailure( "Error compiling regular expression '" + anExpression + "': " + e.getMessage(), e);
131 catch (Throwable t) {
132 throw new SimpleParserFailure( t );
135 public boolean isAtEnd() {
136 return position>=data.length();
139 public static class SimpleParserFailure extends Failure {
140 public SimpleParserFailure(Throwable aThrowable) {
141 super(aThrowable.getMessage(), aThrowable);
144 public SimpleParserFailure(String aMessage, Throwable aThrowable) {
145 super(aMessage, aThrowable);
149 public static class SimpleParserExc extends Exc {
150 public SimpleParserExc(String aMessage) {