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The source code/* * $Header: /cvsroot/mvnforum/myvietnam/src/net/myvietnam/mvncore/filter/EnableHtmlTagFilter.java,v 1.5 2005/01/18 12:16:40 minhnn Exp $ * $Author: minhnn $ * $Revision: 1.5 $ * $Date: 2005/01/18 12:16:40 $ * * ==================================================================== * * Copyright (C) 2002-2005 by MyVietnam.net * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or any later version. * * All copyright notices regarding MyVietnam and MyVietnam CoreLib * MUST remain intact in the scripts and source code. * * 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 General Public License for more details. * * You should have received a copy of the GNU 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. * * Correspondence and Marketing Questions can be sent to: * info@MyVietnam.net * * @author: Minh Nguyen minhnn@MyVietnam.net * @author: Mai Nguyen mai.nh@MyVietnam.net */ package net.myvietnam.mvncore.filter; public final class EnableHtmlTagFilter { private EnableHtmlTagFilter() { //prevent instantiation } public static String filter(String input) { if (input == null) { return null; } char[] s = input.toCharArray(); int length = s.length; StringBuffer ret = new StringBuffer(length); for (int i = 0; i < length; i++) { if (s[i] == '&') { if ( ((i + 3) < length) && (s[i + 1] == 'l') && (s[i + 2] == 't') && (s[i + 3] == ';')) { // < = < ret.append('<'); i += 3; } else if ( ((i + 3) < length) && (s[i+1] == 'g') && (s[i+2] == 't') && (s[i+3] == ';') ) { // > = > ret.append('>'); i += 3; } else if ( ((i + 4) < length) && (s[i+1] == 'a') && (s[i+2] == 'm') && (s[i+3] == 'p') && (s[i+4] == ';') ) { // & = & ret.append('&'); i += 4; } else if ( ((i + 5) < length) && (s[i+1] == 'q') && (s[i+2] == 'u') && (s[i+3] == 'o') && (s[i+4] == 't') && (s[i+5] == ';') ) { // " = " ret.append('"'); i += 5; } else { ret.append('&'); } } else { ret.append(s[i]); } }// for return ret.toString(); } /* public static void main(String[] args) { //String input = " < > & ""; String input = "<> <mvn> & &" ;"; System.out.println("input = '" + input + "' length = " + input.length()); EnableHtmlTagFilter enableEmotionFilter = new EnableHtmlTagFilter(); long start = System.currentTimeMillis(); String output = null; for (int i = 0; i <100; i++) { output = enableEmotionFilter.filter(input); } long time = System.currentTimeMillis() - start; System.out.println("total time = " + time); System.out.println(output); } */ } |
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