/**
 * HTMLUtils.java
 * CoolServlets.com
 * February 2, 2000
 * Version 1.0
 *
 *  Copyright (C) 2000 CoolServlets.com
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU Library General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package com.coolservlets.util;

public class HTMLUtils {

    /**
     * This method takes a string which may contain HTML tags (ie, <b>, ,
     * etc) and converts the '<' and '>' characters to their HTML escape
     * sequences.
     *
     * @param input The text to be converted.
     * @return The input string with the characters '<' and '>' replaced with < and > respectively.
     */
    public static String escapeHTMLTags( String input ) {
        // Check if the string is null or zero length -- if so, return what was sent in.
        if( input == null || input.length() == 0 ) {
            return input;
        }
        // Use a StringBuffer in lieu of String concatenation -- it is much more efficient this way.
        StringBuffer buf = new StringBuffer();
        char ch = ' ';
        for( int i=0; i<input.length(); i++ ) {
            ch = input.charAt(i);
            if( ch == '<' ) {
                buf.append( "<" );
            }
            else if( ch == '>' ) {
                buf.append( ">" );
            }
            else {
                buf.append( ch );
            }
        }
        return buf.toString();
    }

}




  

      

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