/******************************************************************************
 * This program copies an Unicode text input stream to the console 
 * character with the execption of the standard XML character entities
 * which it encodes.  Also encodes codepoints above 127.
 * 
 * Copyright © 2020 Richard Lesh.  All rights reserved.
 *****************************************************************************/

import org.pureprogrammer.Utils;

public class XMLEncodingFilter {

    public static void main(String[] args) {
        int c;
        while ((c = Utils.getchar()) != -1) {
            if (c == "<".codePointAt(0)) {
                System.out.print("&lt;");
            } else if (c == ">".codePointAt(0)) {
                System.out.print("&gt;");
            } else if (c == "&".codePointAt(0)) {
                System.out.print("&amp;");
            } else if (c == "'".codePointAt(0)) {
                System.out.print("&apos;");
            } else if (c == "\"".codePointAt(0)) {
                System.out.print("&quot;");
            } else if (c > 127) {
                System.out.print(Utils.format("&#x{0:04x};", c));
            } else {
                System.out.print(String.valueOf(Character.toChars(c)));
            }
        }
    }
}