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 any library licensed under the Apache Software License,
22 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
23 * (or with modified versions of the above that use the same license as the above),
24 * and distribute linked combinations including the two. You must obey the
25 * GNU General Public License in all respects for all of the code used other than
26 * the above mentioned libraries. If you modify this file, you may extend this
27 * exception to your version of the file, but you are not obligated to do so.
28 * If you do not wish to do so, delete this exception statement from your version.
40 * Class to parse structured content:
44 * countries = [ spain 'united kingdom' germany ]
46 * spain = [ 'madrid' barcelona bilbao ]
47 * 'united kingdom' = [ 'london' 'lancaster' ]
48 * germany = [ 'berlin' 'bremen' ]
53 * And put it into a <code>String</code>/<code>Map</code>/<code>List</code> structure.
56 * Parsing is be very optimistic: no exception is ever to be thrown.
58 * <p>Copyright: Copyright (c) 2003</p>
60 * @author not attributable
63 public class StructuredContentParser {
64 public StructuredContentParser() {
67 private static class Scanner {
71 public Scanner(String aData) {
76 public String scanIdentifier() {
77 StringBuffer result = new StringBuffer();
79 while (!isAtEnd() && Character.isJavaIdentifierPart(peek())) {
80 result.append(scan());
83 return result.toString();
86 public String scanString() {
87 StringBuffer result = new StringBuffer();
94 boolean finished = false;
96 while (!finished && !isAtEnd()) {
99 if (data == delimiter) {
100 if (!isAtEnd() && peek() == delimiter) {
111 return result.toString();
114 public void skipSpace() {
115 while (!isAtEnd() && Character.isWhitespace(peek()))
119 public boolean isAtEnd() {
120 return position >= data.length();
125 return data.charAt(position);
133 char result =data.charAt(position);
142 public static List parseList(Scanner aScanner) {
143 List result = new Vector();
144 aScanner.skipSpace();
145 if (aScanner.peek() == '[')
147 aScanner.skipSpace();
148 Object object = parseObject(aScanner);
150 while (object != null) {
152 aScanner.skipSpace();
153 object = parseObject(aScanner);
156 aScanner.skipSpace();
157 if (aScanner.peek() == ']')
163 public static Map parseMap(Scanner aScanner) {
164 Map result = new HashMap();
165 aScanner.skipSpace();
166 if (aScanner.peek() == '{')
168 aScanner.skipSpace();
169 Object key = parseObject(aScanner);
170 aScanner.skipSpace();
171 if (aScanner.peek() == '=')
173 aScanner.skipSpace();
174 Object value = parseObject(aScanner);
177 while (key != null && value!=null) {
178 result.put(key, value);
179 aScanner.skipSpace();
180 key = parseObject(aScanner);
181 aScanner.skipSpace();
182 if (aScanner.peek() == '=')
184 aScanner.skipSpace();
185 value = parseObject(aScanner);
188 aScanner.skipSpace();
189 if (aScanner.peek() == '}')
195 public static Object parseObject(Scanner aScanner) {
196 Object result = null;
198 aScanner.skipSpace();
200 if (!aScanner.isAtEnd()) {
201 char data = aScanner.peek();
204 return parseList(aScanner);
206 return parseMap(aScanner);
207 if (data == '\'' || data == '"')
208 return aScanner.scanString();
209 if (Character.isJavaIdentifierPart(data))
210 return aScanner.scanIdentifier();
216 public static Object parse(String aData) {
217 Scanner scanner = new Scanner(aData);
219 return parseObject(scanner);
222 public static String constructStringLiteral(String aString) {
223 final char[] CHARACTERS_TO_ESCAPE = { '\'' };
224 final String[] ESCAPE_CODES = { "\'\'" };
226 return "'" + StringRoutines.replaceStringCharacters(aString, CHARACTERS_TO_ESCAPE, ESCAPE_CODES) + "'";