package rabbit.filter;import java.util.List;import rabbit.html.HtmlBlock;import rabbit.html.Token;import rabbit.html.Tag;import rabbit.http.HttpHeader;import rabbit.proxy.Connection;/** A class that inserts some text and links at the top of a page. *  Useful for inserting links to unfiltered page. * * @author <a href="mailto:robo@khelekore.org">Robert Olofsson</a> */public abstract class SimpleTagFilter extends HtmlFilter {        // For the factory.    public SimpleTagFilter () {    }    /** Create a new SimpleTagFilter for the given request, response pair.     * @param con the Connection handling the request.     * @param request the actual request made.     * @param response the actual response being sent.     */    public SimpleTagFilter (Connection con, 			    HttpHeader request, 			    HttpHeader response) {		super (con, request, response);    }    /** Iterate over all tags and call handleTag on them.      * @param block the part of the html page we are filtering.     */    public void filterHtml (HtmlBlock block) {	List<Token> tokens = block.getTokens ();	int tsize = tokens.size ();	for (int i = 0; i < tsize; i++) {	    Token t = tokens.get (i);	    switch (t.getType ()) {	    case TAG:		Tag tag = t.getTag ();		handleTag (tag, block, i);	    }	}    }    /** Handle a tag.      * @param tag the Tag to handle.     * @param block the current HtmlBlock     * @param tokenIndex the index of the current Token     */    public abstract void handleTag (Tag tag, HtmlBlock block, int tokenIndex);}