source: josm/src/org/openstreetmap/josm/tools/XmlWriter.java@ 74

package org.openstreetmap.josm.tools;

import java.util.HashMap;

/**
 * Helper class to use for xml outputting classes.
 * 
 * @author imi
 */
public class XmlWriter {

        /**
         * Encode the given string in XML1.0 format.
         * Optimized to fast pass strings that don't need encoding (normal case).
         */
        public static String encode(String unencoded) {
                StringBuilder buffer = null;
                for (int i = 0; i < unencoded.length(); ++i) {
                        String encS = XmlWriter.encoding.get(unencoded.charAt(i));
                        if (encS != null) {
                                if (buffer == null)
                                        buffer = new StringBuilder(unencoded.substring(0,i));
                                buffer.append(encS);
                        } else if (buffer != null)
                                buffer.append(unencoded.charAt(i));
                }
                return (buffer == null) ? unencoded : buffer.toString();
        }

        /**
         * @return The standard XML1.0 header. Encoding is utf-8
         */
        public static String header() {
                return "<?xml version='1.0' encoding='UTF-8'?>";
        }

        
        
        final private static HashMap<Character, String> encoding = new HashMap<Character, String>();
        static {
                encoding.put('<', "&lt;");
                encoding.put('>', "&gt;");
                encoding.put('"', "&quot;");
                encoding.put('\'', "&apos;");
                encoding.put('&', "&amp;");
                encoding.put('\n', "&#xA;");
                encoding.put('\r', "&#xD;");
                encoding.put('\t', "&#x9;");
        }
}