001: /*
002: License $Id: Comment.java,v 1.4 2003/09/13 04:59:56 hendriks73 Exp $
003:
004: Copyright (c) 2001-2005 tagtraum industries.
005:
006: LGPL
007: ====
008:
009: jo! is free software; you can redistribute it and/or
010: modify it under the terms of the GNU Lesser General Public
011: License as published by the Free Software Foundation; either
012: version 2.1 of the License, or (at your option) any later version.
013:
014: jo! is distributed in the hope that it will be useful,
015: but WITHOUT ANY WARRANTY; without even the implied warranty of
016: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
017: Lesser General Public License for more details.
018:
019: You should have received a copy of the GNU Lesser General Public
020: License along with this library; if not, write to the Free Software
021: Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
022:
023: For LGPL see <http://www.fsf.org/copyleft/lesser.txt>
024:
025:
026: Sun license
027: ===========
028:
029: This release contains software by Sun Microsystems. Therefore
030: the following conditions have to be met, too. They apply to the
031: files
032:
033: - lib/mail.jar
034: - lib/activation.jar
035: - lib/jsse.jar
036: - lib/jcert.jar
037: - lib/jaxp.jar
038: - lib/crimson.jar
039: - lib/servlet.jar
040: - lib/jnet.jar
041: - lib/jaas.jar
042: - lib/jaasmod.jar
043:
044: contained in this release.
045:
046: a. Licensee may not modify the Java Platform
047: Interface (JPI, identified as classes contained within the javax
048: package or any subpackages of the javax package), by creating additional
049: classes within the JPI or otherwise causing the addition to or modification
050: of the classes in the JPI. In the event that Licensee creates any
051: Java-related API and distribute such API to others for applet or
052: application development, you must promptly publish broadly, an accurate
053: specification for such API for free use by all developers of Java-based
054: software.
055:
056: b. Software is confidential copyrighted information of Sun and
057: title to all copies is retained by Sun and/or its licensors. Licensee
058: shall not modify, decompile, disassemble, decrypt, extract, or otherwise
059: reverse engineer Software. Software may not be leased, assigned, or
060: sublicensed, in whole or in part. Software is not designed or intended
061: for use in on-line control of aircraft, air traffic, aircraft navigation
062: or aircraft communications; or in the design, construction, operation or
063: maintenance of any nuclear facility. Licensee warrants that it will not
064: use or redistribute the Software for such purposes.
065:
066: c. Software is provided "AS IS," without a warranty
067: of any kind. ALL EXPRESS OR IMPLIED REPRESENTATIONS AND WARRANTIES,
068: INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
069: PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED.
070:
071: d. This License is effective until terminated. Licensee may
072: terminate this License at any time by destroying all copies of Software.
073: This License will terminate immediately without notice from Sun if Licensee
074: fails to comply with any provision of this License. Upon such termination,
075: Licensee must destroy all copies of Software.
076:
077: e. Software, including technical data, is subject to U.S.
078: export control laws, including the U.S. Export Administration Act and its
079: associated regulations, and may be subject to export or import regulations
080: in other countries. Licensee agrees to comply strictly with all such
081: regulations and acknowledges that it has the responsibility to obtain
082: licenses to export, re-export, or import Software. Software may not be
083: downloaded, or otherwise exported or re-exported (i) into, or to a national
084: or resident of, Cuba, Iraq, Iran, North Korea, Libya, Sudan, Syria or any
085: country to which the U.S. has embargoed goods; or (ii) to anyone on the
086: U.S. Treasury Department's list of Specially Designated Nations or the U.S.
087: Commerce Department's Table of Denial Orders.
088:
089:
090: Feedback
091: ========
092:
093: We encourage your feedback and suggestions and want to use your feedback to
094: improve the Software. Send all such feedback to:
095: <feedback@tagtraum.com>
096:
097: For more information on tagtraum industries and jo!
098: please see <http://www.tagtraum.com/>.
099:
100:
101: */
102: package com.tagtraum.framework.markup;
103:
104: import java.io.IOException;
105: import java.io.Reader;
106:
107: /**
108: * Parses a comment: <code><--! ... --></code>
109: *
110: * @author <a href="mailto:hs@tagtraum.com">Hendrik Schreiber</a>
111: * @version 1.1beta1 $Id: Comment.java,v 1.4 2003/09/13 04:59:56 hendriks73 Exp $
112: */
113: public class Comment extends RawDataElement {
114:
115: /**
116: * Source-Version
117: */
118: public static String vcid = "$Id: Comment.java,v 1.4 2003/09/13 04:59:56 hendriks73 Exp $";
119:
120: /**
121: * Constructor.
122: */
123: public Comment(String aTagStart) {
124: super (aTagStart);
125: }
126:
127: /**
128: * Parses the comment.
129: */
130: public void parse(Reader aReader) throws IOException {
131: int c = 0;
132: boolean endOfComment = false;
133: int ringHead = 0;
134: int bufpos;
135: int len = 0;
136: int tagpos;
137: String theTagEnd = getTagEnd() + ">";
138: int theTagEndLength = theTagEnd.length();
139: char buf[] = new char[theTagEndLength];
140:
141: aReader.skip(getTagStart().length());
142:
143: while (!endOfComment) {
144: c = aReader.read();
145:
146: append((char) c);
147:
148: if (c == -1) {
149: return; // EOF
150: }
151:
152: len++;
153: buf[ringHead] = (char) c; // ringbuffer
154:
155: if (len >= theTagEndLength) {
156: // compare, beginning from the last position backward
157: for (bufpos = ringHead + buf.length, tagpos = theTagEndLength - 1; tagpos >= 0; --bufpos, --tagpos) {
158: if (theTagEnd.charAt(tagpos) != buf[bufpos
159: % buf.length]) {
160: break;
161: }
162: }
163:
164: endOfComment = (tagpos == -1);
165: }
166:
167: ringHead = (++ringHead) % buf.length;
168: }
169:
170: finish();
171: }
172:
173: /**
174: * Internal method.
175: */
176: protected void finish() {
177: myData = sb
178: .substring(0, sb.length() - getTagEnd().length() - 1);
179: }
180:
181: /**
182: * String representation.
183: */
184: public String toString() {
185: return "<" + getTagStart() + myData + getTagEnd() + ">";
186: }
187:
188: /**
189: * Returns the end characters of a tag.
190: */
191: public String getTagEnd() {
192: return "--";
193: }
194:
195: }
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