core/src/main/java/org/apache/ftpserver/ipfilter/MinaSessionFilter.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.ftpserver.ipfilter;

import org.apache.mina.core.filterchain.IoFilterAdapter;
import org.apache.mina.core.session.IoSession;

/**
 * A wrapper for <code>SessionFilter</code> so it can be added to the MINA
 * filter chain.
 * 
 * @author <a href="http://mina.apache.org">Apache MINA Project</a>
 * 
 */

public class MinaSessionFilter extends IoFilterAdapter {

    /**
     * The actual (or wrapped) <code>SessionFilter</code> used by this filter.
     */
    private final SessionFilter filter;

    /**
     * Creates a new instance of <code>MinaSessionFilter</code>.
     * 
     * @param filter
     *            the filter
     */
    public MinaSessionFilter(SessionFilter filter) {
        this.filter = filter;
    }

    @Override
    public void sessionCreated(NextFilter nextFilter, IoSession session) {
        if (!filter.accept(session)) {
            session.close(true);
        } else {
            nextFilter.sessionCreated(session);
        }
    }
}