001/* 002 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * bstefanescu 018 * 019 * $Id$ 020 */ 021 022package org.nuxeo.ecm.platform.rendering.wiki.extensions; 023 024import java.util.regex.Matcher; 025import java.util.regex.Pattern; 026 027import org.nuxeo.common.xmap.annotation.XNode; 028import org.nuxeo.common.xmap.annotation.XObject; 029import org.nuxeo.ecm.platform.rendering.wiki.WikiFilter; 030 031/** 032 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a> 033 */ 034@XObject("filter") 035public class PatternFilter implements WikiFilter { 036 037 @XNode("pattern") 038 protected Pattern pattern; 039 040 @XNode("replacement") 041 protected String replacement; 042 043 public PatternFilter(String pattern, String replacement) { 044 this.pattern = Pattern.compile(pattern); 045 this.replacement = replacement; 046 } 047 048 public String apply(String content) { 049 Matcher matcher = pattern.matcher(content); 050 if (!matcher.find()) { 051 return null; 052 } 053 StringBuffer sb = new StringBuffer(); 054 do { 055 matcher.appendReplacement(sb, replacement); 056 } while (matcher.find()); 057 matcher.appendTail(sb); 058 return sb.toString(); 059 } 060 061}