/**
 * This class contains very simple methods that parse out 
 * xml chat message. This class is not intend to use for
 * complicate xml.
 *
 * @author David Dao (ddao@arsdigita.com)
 * @creation-date December 6, 2000
 * @cvs-id $Id: adChatSimpleXMLParser.java,v 1.1.1.1 2002/07/09 17:35:02 rmello Exp $
 */
public class adChatSimpleXMLParser {
    public static String removeTag(String str, String tag) {
	String ret = str;
	
	int start_index = str.indexOf("<" + tag + ">");
	
	if (start_index >= 0) {
	    int end_index = str.indexOf("</" + tag + ">");
	    if (end_index >= 0) {

		ret = str.substring(0, start_index);
		ret = ret.concat(str.substring(end_index + 3 + tag.length(), str.length()));
	    }
	}
	
	return ret;
    }

    public static String getTag(String str, String tag) {
	String ret = null;
	
	int start_index = str.indexOf("<" + tag + ">");
	
	if (start_index >= 0) {
	    int end_index = str.indexOf("</" + tag + ">");
	    if (end_index >= 0) {
		ret = str.substring(start_index + 2 + tag.length(), end_index);
	    }
	}
	
	return ret;
    }

    public static boolean containTag(String str, String tag) {
	boolean ret = false;

	int start_index = str.indexOf("<" + tag + ">");
	if (start_index >= 0) {
	    int end_index = str.indexOf("</" + tag + ">");
	    if (end_index >= 0)
		ret = true;

	}
	
	return ret;
    }

}