001/* 002 * Sonar, open source software quality management tool. 003 * Copyright (C) 2008-2012 SonarSource 004 * mailto:contact AT sonarsource DOT com 005 * 006 * Sonar is free software; you can redistribute it and/or 007 * modify it under the terms of the GNU Lesser General Public 008 * License as published by the Free Software Foundation; either 009 * version 3 of the License, or (at your option) any later version. 010 * 011 * Sonar is distributed in the hope that it will be useful, 012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 * Lesser General Public License for more details. 015 * 016 * You should have received a copy of the GNU Lesser General Public 017 * License along with Sonar; if not, write to the Free Software 018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02 019 */ 020package org.sonar.api.web; 021 022import com.google.common.annotations.Beta; 023import com.google.common.base.Preconditions; 024import com.google.common.base.Strings; 025import org.sonar.api.ServerExtension; 026 027import javax.servlet.Filter; 028 029/** 030 * @since 3.1 031 */ 032@Beta 033public abstract class ServletFilter implements ServerExtension, Filter { 034 035 /** 036 * Override to change URL. Default is /* 037 */ 038 public UrlPattern doGetPattern() { 039 return UrlPattern.create("/*"); 040 } 041 042 public static final class UrlPattern { 043 private int code; 044 private String url; 045 private String urlToMatch; 046 047 public static UrlPattern create(String pattern) { 048 return new UrlPattern(pattern); 049 } 050 051 private UrlPattern(String url) { 052 Preconditions.checkArgument(!Strings.isNullOrEmpty(url), "Empty url"); 053 this.url = url; 054 this.urlToMatch = url.replaceAll("/?\\*", ""); 055 if ("/*".equals(url)) { 056 code = 1; 057 } else if (url.startsWith("*")) { 058 code = 2; 059 } else if (url.endsWith("*")) { 060 code = 3; 061 } else { 062 code = 4; 063 } 064 } 065 066 public boolean matches(String path) { 067 switch (code) { 068 case 1: 069 return true; 070 case 2: 071 return path.endsWith(urlToMatch); 072 case 3: 073 return path.startsWith(urlToMatch); 074 default: 075 return path.equals(urlToMatch); 076 } 077 } 078 079 public String getUrl() { 080 return url; 081 } 082 083 @Override 084 public String toString() { 085 return url; 086 } 087 } 088}