mitm.common.dlp.impl.MatchFilterRegistryImpl.java Source code

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Here is the source code for mitm.common.dlp.impl.MatchFilterRegistryImpl.java

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/*
 * Copyright (c) 2010-2011, Martijn Brinkers, Djigzo.
 * 
 * This file is part of Djigzo email encryption.
 *
 * Djigzo is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License 
 * version 3, 19 November 2007 as published by the Free Software 
 * Foundation.
 *
 * Djigzo 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public 
 * License along with Djigzo. If not, see <http://www.gnu.org/licenses/>
 *
 * Additional permission under GNU AGPL version 3 section 7
 * 
 * If you modify this Program, or any covered work, by linking or 
 * combining it with aspectjrt.jar, aspectjweaver.jar, tyrex-1.0.3.jar, 
 * freemarker.jar, dom4j.jar, mx4j-jmx.jar, mx4j-tools.jar, 
 * spice-classman-1.0.jar, spice-loggerstore-0.5.jar, spice-salt-0.8.jar, 
 * spice-xmlpolicy-1.0.jar, saaj-api-1.3.jar, saaj-impl-1.3.jar, 
 * wsdl4j-1.6.1.jar (or modified versions of these libraries), 
 * containing parts covered by the terms of Eclipse Public License, 
 * tyrex license, freemarker license, dom4j license, mx4j license,
 * Spice Software License, Common Development and Distribution License
 * (CDDL), Common Public License (CPL) the licensors of this Program grant 
 * you additional permission to convey the resulting work.
 */
package mitm.common.dlp.impl;

import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang.StringUtils;

import mitm.common.dlp.MatchFilter;
import mitm.common.dlp.MatchFilterRegistry;
import mitm.common.util.Check;

/**
 * Implementation of MatchFilterRegistry that stores MatchFilter's in memory.
 * 
 * @author Martijn Brinkers
 *
 */
public class MatchFilterRegistryImpl implements MatchFilterRegistry {
    private final Map<String, MatchFilter> filters = new HashMap<String, MatchFilter>();

    public MatchFilterRegistryImpl(List<MatchFilter> filters) {
        if (filters != null) {
            for (MatchFilter filter : filters) {
                addMatchFilter(filter);
            }
        }
    }

    @Override
    public synchronized void addMatchFilter(MatchFilter filter) {
        Check.notNull(filter, "filter");

        String name = StringUtils.lowerCase(filter.getName());

        if (StringUtils.isEmpty(name)) {
            throw new IllegalArgumentException("Filter name is empty.");
        }

        if (filters.containsKey(name)) {
            throw new IllegalArgumentException("Filter with name " + name + " is already registered.");
        }

        filters.put(name, filter);
    }

    @Override
    public synchronized MatchFilter getMatchFilter(String name) {
        if (name == null) {
            return null;
        }

        return filters.get(StringUtils.lowerCase(name));
    }

    @Override
    public synchronized List<MatchFilter> getMatchFilters() {
        return new LinkedList<MatchFilter>(filters.values());
    }
}