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