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.
33 import java.util.HashMap;
34 import java.util.List;
36 import java.util.Vector;
42 * Class to parse structured content:
46 * countries = [ spain 'united kingdom' germany ]
48 * spain = [ 'madrid' barcelona bilbao ]
49 * 'united kingdom' = [ 'london' 'lancaster' ]
50 * germany = [ 'berlin' 'bremen' ]
55 * And put it into a <code>String</code>/<code>Map</code>/<code>List</code> structure.
58 * Parsing is be very optimistic: no exception is ever to be thrown.
61 public class StructuredContentParser {
62 public StructuredContentParser() {
65 private static class Scanner {
69 public Scanner(String aData) {
74 public String scanIdentifier() {
75 StringBuffer result = new StringBuffer();
77 while (!isAtEnd() && Character.isJavaIdentifierPart(peek())) {
78 result.append(scan());
81 return result.toString();
84 public String scanString() {
85 StringBuffer result = new StringBuffer();
92 boolean finished = false;
94 while (!finished && !isAtEnd()) {
97 if (data == delimiter) {
98 if (!isAtEnd() && peek() == delimiter) {
109 return result.toString();
112 public void skipSpace() {
113 while (!isAtEnd() && Character.isWhitespace(peek()))
117 public boolean isAtEnd() {
118 return position >= data.length();
123 return data.charAt(position);
131 char result = data.charAt(position);
140 public static List parseList(Scanner aScanner) {
141 List result = new Vector();
142 aScanner.skipSpace();
143 if (aScanner.peek() == '[')
145 aScanner.skipSpace();
146 Object object = parseObject(aScanner);
148 while (object != null) {
150 aScanner.skipSpace();
151 object = parseObject(aScanner);
154 aScanner.skipSpace();
155 if (aScanner.peek() == ']')
161 public static Map parseMap(Scanner aScanner) {
162 Map result = new HashMap();
163 aScanner.skipSpace();
164 if (aScanner.peek() == '{')
166 aScanner.skipSpace();
167 Object key = parseObject(aScanner);
168 aScanner.skipSpace();
169 if (aScanner.peek() == '=')
171 aScanner.skipSpace();
172 Object value = parseObject(aScanner);
175 while (key != null && value!=null) {
176 result.put(key, value);
177 aScanner.skipSpace();
178 key = parseObject(aScanner);
179 aScanner.skipSpace();
180 if (aScanner.peek() == '=')
182 aScanner.skipSpace();
183 value = parseObject(aScanner);
186 aScanner.skipSpace();
187 if (aScanner.peek() == '}')
193 public static Object parseObject(Scanner aScanner) {
194 aScanner.skipSpace();
196 if (!aScanner.isAtEnd()) {
197 char data = aScanner.peek();
200 return parseList(aScanner);
202 return parseMap(aScanner);
203 if (data == '\'' || data == '"')
204 return aScanner.scanString();
205 if (Character.isJavaIdentifierPart(data))
206 return aScanner.scanIdentifier();
212 public static Object parse(String aData) {
213 Scanner scanner = new Scanner(aData);
215 return parseObject(scanner);
218 public static String constructStringLiteral(String aString) {
219 final char[] CHARACTERS_TO_ESCAPE = { '\'' };
220 final String[] ESCAPE_CODES = { "\'\'" };
222 return "'" + StringRoutines.replaceStringCharacters(aString, CHARACTERS_TO_ESCAPE, ESCAPE_CODES) + "'";