001/*
002 * (C) Copyright 2006-2007 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 *     Nuxeo - initial API and implementation
018 *
019 * $Id: ActionFilterRegistry.java 20637 2007-06-17 12:37:03Z sfermigier $
020 */
021
022package org.nuxeo.ecm.platform.actions;
023
024import java.io.Serializable;
025import java.util.Collection;
026import java.util.Collections;
027import java.util.HashMap;
028import java.util.Map;
029
030import org.apache.commons.logging.Log;
031import org.apache.commons.logging.LogFactory;
032
033/**
034 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
035 */
036public class ActionFilterRegistry implements Serializable {
037
038    private static final Log log = LogFactory.getLog(ActionFilterRegistry.class);
039
040    private static final long serialVersionUID = 1L;
041
042    private final Map<String, ActionFilter> filters;
043
044    public ActionFilterRegistry() {
045        filters = new HashMap<String, ActionFilter>();
046    }
047
048    public synchronized void addFilter(ActionFilter filter) {
049        String id = filter.getId();
050        if (log.isDebugEnabled()) {
051            if (filters.containsKey(id)) {
052                log.debug("Overriding action filter: " + id);
053            } else {
054                log.debug("Registering action filter: " + id);
055            }
056        }
057        filters.put(id, filter);
058    }
059
060    public synchronized ActionFilter removeFilter(String id) {
061        if (log.isDebugEnabled()) {
062            log.debug("Un-Registering action filter: " + id);
063        }
064
065        return filters.remove(id);
066    }
067
068    public synchronized Collection<ActionFilter> getFilters() {
069        return Collections.unmodifiableCollection(filters.values());
070    }
071
072    public synchronized ActionFilter getFilter(String id) {
073        return filters.get(id);
074    }
075
076}