/* Copyright 2002, 2003 Elliotte Rusty Harold
This library is free software; you can redistribute it and/or modify
it under the terms of version 2.1 of the GNU Lesser General Public
License as published by the Free Software Foundation.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
You can contact Elliotte Rusty Harold by sending e-mail to
[email protected]. Please include the word "XOM" in the
subject line. The XOM home page is located at http://www.xom.nu/
*/
package nu.xom.samples;
import java.io.IOException;
import nu.xom.Builder;
import nu.xom.Document;
import nu.xom.Node;
import nu.xom.ParsingException;
import nu.xom.Text;
/**
* <p>
* Demonstrates getter and setter methods in the <code>Text</code> class,
* as well as recursive descent through a document.
* </p>
*
* @author Elliotte Rusty Harold
* @version 1.0
*
*/
public class ROT13XML {
// note use of recursion
public static void encode(Node node) {
if (node instanceof Text) {
Text text = (Text) node;
String data = text.getValue();
text.setValue(rot13(data));
}
// recurse the children
for (int i = 0; i < node.getChildCount(); i++) {
encode(node.getChild(i));
}
}
public static String rot13(String s) {
StringBuffer out = new StringBuffer(s.length());
for (int i = 0; i < s.length(); i++) {
int c = s.charAt(i);
if (c >= 'A' && c <= 'M') out.append((char) (c+13));
else if (c >= 'N' && c <= 'Z') out.append((char) (c-13));
else if (c >= 'a' && c <= 'm') out.append((char) (c+13));
else if (c >= 'n' && c <= 'z') out.append((char) (c-13));
else out.append((char) c);
}
return out.toString();
}
public static void main(String[] args) {
if (args.length <= 0) {
System.out.println("Usage: java nu.xom.samples.ROT13XML URL");
return;
}
String url = args[0];
try {
Builder parser = new Builder();
// Read the document
Document document = parser.build(url);
// Modify the document
ROT13XML.encode(document);
// Write it out again
System.out.println(document.toXML());
}
catch (IOException ex) {
System.out.println(
"Due to an IOException, the parser could not encode " + url
);
}
catch (ParsingException ex) {
System.out.println(ex);
}
} // end main
}
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