001/*
002 * (C) Copyright 2006-2008 Nuxeo SAS (http://nuxeo.com/) and contributors.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     Alexandre Russel
016 *
017 * $Id$
018 */
019
020package org.nuxeo.ecm.platform.annotations.service;
021
022import java.util.List;
023
024/**
025 * @author Alexandre Russel
026 */
027public class URLPatternFilter {
028
029    private final boolean allowDeny;
030
031    private final List<String> denies;
032
033    private final List<String> allows;
034
035    public URLPatternFilter(boolean allowDeny, List<String> denies, List<String> allows) {
036        this.allowDeny = allowDeny;
037        this.denies = denies;
038        this.allows = allows;
039    }
040
041    public boolean allow(String url) {
042        if (checkFirstPass(url) && !checkSecondPass(url)) {
043            return allowDeny;
044        }
045        return !allowDeny;
046    }
047
048    private boolean checkSecondPass(String url) {
049        return checkMatch(allowDeny ? denies : allows, url);
050    }
051
052    private static boolean checkMatch(List<String> list, String url) {
053        for (String regex : list) {
054            if (url.matches(regex)) {
055                return true;
056            }
057        }
058        return false;
059    }
060
061    private boolean checkFirstPass(String url) {
062        return checkMatch(allowDeny ? allows : denies, url);
063    }
064
065}